CN104363192A - Receiving method and device of MIMO (multiple-input multiple-output) communication system compatible to multiple frame formats - Google Patents

Receiving method and device of MIMO (multiple-input multiple-output) communication system compatible to multiple frame formats Download PDF

Info

Publication number
CN104363192A
CN104363192A CN201410564348.3A CN201410564348A CN104363192A CN 104363192 A CN104363192 A CN 104363192A CN 201410564348 A CN201410564348 A CN 201410564348A CN 104363192 A CN104363192 A CN 104363192A
Authority
CN
China
Prior art keywords
ppdu
sig
mimo
ofdm
field
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201410564348.3A
Other languages
Chinese (zh)
Other versions
CN104363192B (en
Inventor
何世文
吴波
王海明
黄永明
张军
洪伟
江华
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nanjing Etaco Communication Technology Co ltd
Nanjing Zeputuo Information Technology Co ltd
Original Assignee
In Jiangsu Emerging Micro-Communication Ceases Science And Technology Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by In Jiangsu Emerging Micro-Communication Ceases Science And Technology Ltd filed Critical In Jiangsu Emerging Micro-Communication Ceases Science And Technology Ltd
Priority to CN201410564348.3A priority Critical patent/CN104363192B/en
Publication of CN104363192A publication Critical patent/CN104363192A/en
Application granted granted Critical
Publication of CN104363192B publication Critical patent/CN104363192B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Landscapes

  • Radio Transmission System (AREA)

Abstract

The invention discloses a receiving method and device of an MIMO (multiple-input multiple-output) communication system compatible to multiple frame formats and belongs to the technical field of wireless communication. In a millimeter-wave wireless communication system, stations working in the same basic service set are likely to receive three different types of PPDUs (physical layer protocol data units), namely a single-carrier MIMO PPDU, an OFDM (orthogonal frequency division multiplexing) MIMO PPDU and an OFDM MU-MIMO (multi-user multiple-input multiple-output) PPDU. Preambles of the three frame formats are identical to signaling fields A in format and sent in a single-carrier mode. The receiving method includes that a receiver demodulates the signaling fields A with the single-carrier mode, a receiving process is configured on the basis of the signaling fields A and signaling fields B, and the various PPDUs are demodulated. Compared with the prior art, the receiving method and device have the advantage that reliability and compatibility of the system are improved effectively.

Description

Receiving method and device of MIMO communication system compatible with multiple frame formats
Technical Field
The invention relates to a received signal processing method and a received signal processing device applied to a Multiple-input Multiple-Output (MIMO) mixed carrier mechanism communication system of a wireless local area network, which can process Multiple Physical Layer Protocol Data units (PPDU), a receiver configures a receiving flow based on a signaling field A and a signaling field B, effectively improves the reliability and compatibility of the system and belongs to the technical field of wireless communication.
Background
Due to the increasing shortage of wireless spectrum resources, millimeter wave communication technology has gained wide attention and is one of the most promising communication technologies. Millimeter wave communication technology with high throughput has become one of the most active fields of wireless communication technology. In the millimeter wave frequency band, it is urgently needed to reduce the peak-to-average ratio of the baseband signal so as to reduce the design difficulty of the power amplifier. Compared with an Orthogonal Frequency Division Multiplexing (OFDM) system, the single-carrier modulation mode has the advantage of low peak-to-average ratio and still has the receiver complexity and the communication system performance similar to the OFDM. Therefore, a single carrier system is widely adopted in millimeter wave communication. However, the complexity of single carrier system for implementing precoding and multi-user is relatively high, while the OFDM system can perform precoding design with relatively low complexity and perform precoding operation on the transmitted data, thereby enhancing the reliability and throughput of the system. Therefore, the combined use of single carrier modulation and OFDM modulation is one of the key technologies for millimeter wave communication.
Both the IEEE 802.11ad and IEEE 802.11aj wireless lan standards support single carrier transmission and OFDM transmission at the same time. The IEEE 802.11ad standard uses directional antennas to transmit data, and can only support one data stream. The IEEE 802.11aj standard supports Multiple-Input Multiple-Output (MIMO) technology and Multi-User Multiple-Input Multiple-Output (MU-MIMO) technology. In order to support receiving SC MIMO PPDU, OFDM MIMO PPDU and OFDM MU-MIMO PPDU, three different types of PPDU, IEEE 802.11aj standard provides three different frame formats.
Based on the above findings, a receiver implementing the IEEE 802.11aj standard should have a processing module for receiving the above three frames. The invention provides a receiver processing method and a receiver processing device applied to an MIMO communication system, which can process various physical layer protocol data units, and the receiver configures a receiving process based on a signaling field A and a signaling field B, thereby effectively improving the reliability and the compatibility of the system.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to provide a receiver processing method and a receiver processing device of an MIMO communication system compatible with various PPDU frame formats.
The technical scheme is as follows: in order to better understand the technical scheme of the present invention, the PPDU frame format and the transmission mode based on the method of the present invention are introduced as follows:
the PPDU frame structure of the MIMO communication system processed by the present invention includes: a Single Carrier (SC) MIMO PPDU frame structure containing a Single Carrier preamble (SC sync training field and SC channel estimation training field), SC signaling field A (SIG-A) and SC data field; an OFDM MIMO PPDU frame structure containing an SC preamble, an SC SIG-A, a multi-carrier training field, and an OFDM data field; an OFDM MU-MIMO PPDU frame structure containing an SC preamble, SIG-A, a multi-carrier training field, a signaling field B (SIG-B), and an OFDM data field.
In order to be compatible with the two carrier mechanisms, the preambles and SIG-a in the three structures are all transmitted in an SC manner, and the data field may be transmitted in different carrier manners, such as an SC manner or an OFDM manner. The transmission mode of these PPDUs is briefly described as follows: (1) SC MIMO PPDU: the lead code, the SIG-A and the data field are all sent in an SC mode, and the specific operation mode can refer to a patent with the patent application number of 201410431695.9; (2) OFDM MIMOPPDU and OFDM MU-MIMO PPDU are the mixed carrier mode to send, its detailed sending mode can be seen patent application number 201410431695.9, the brief content is described as follows 1) OFDM MIMO PPDU and OFDM MU-MIMO PPDU lead code and SIG-A are SC mode to send, boost to OFDM sampling rate and send; 2) and the OFDM MU-MIMO PPDU comprises a multi-carrier training field and a data field of the OFDM MIMO PPDU and the OFDM MU-MIMO PPDU, and the SIG-B of the OFDM MU-MIMO are transmitted in an OFDM mode.
In order to achieve the purpose, the invention adopts the following technical scheme:
a receiving method of a MIMO communication system compatible with three frame formats of SC MIMO, OFDM MIMO and OFDM MU-MIMO comprises the following steps:
(1) a station operating under a certain basic service set, when no access channel exists, the radio frequency link is placed in a receiving state, the frame detection is repeated until the arrival of a frame is detected, and the step (2) is entered;
(2) the receiver uses the lead code to complete carrier frequency synchronization, time synchronization and SC MIMO time domain channel coefficient estimation;
(3) after the SIG-A is received and processed based on the time domain channel coefficient obtained in the step (2), performing Cyclic Redundancy Check (CRC) on the SIG-A, if the Check fails, returning to the step (1), and if the Check succeeds, entering the step (4);
(4) analyzing the information of each subfield in SIG-A, judging the frame format type of PPDU according to SC/OFDM subfield and GroupID subfield in SIG-A, calculating the relevant parameters needed by PPDU demodulation aiming at the specific frame format type, if the receiver does not support the Modulation and Coding Scheme (MCS) indicated by SIG-A, returning to the step (1) after waiting for a certain time, otherwise, entering the step (5);
the relevant parameters are specifically:
1) if the PPDU is SC MIMO PPDU, the parameter includes the number of codewords N of the data fieldCWAnd number of SC symbol blocks NBLK；
NCWThe calculation formula of (a) is as follows:
(formula 1)
In equation 1, Length is SIG-A and represents the sub-field of the PPDU data payload, the unit is byte, LCWAnd R respectively represents the code length and code rate of a Low Density Parity Check code (LDPC) codeword;
NBLKthe calculation formula of (a) is as follows:
(formula 2)
In formula 2, NCBPBThe coding bit number of each symbol block of the data field, the value is determined by the coding modulation scheme indicated by SIG-A and the number of spatial streams, when the PPDU is transmitted by non-STBC, mSTBCWhen the PPDU is transmitted in STBC mode, m is 1STBCWhen the PPDU is transmitted in the quasi-orthogonal STBC scheme, m is 2STBC＝4。
2) If the PPDU is an OFDM MIMO PPDU, the parameter comprises the OFDM symbol number N of the data fieldsym；
NsymThe calculation formula of (a) is as follows:
(formula 3)
In formula 3, NCBPSRepresenting the number of coded bits in each OFDM symbol, NCBPSThe value depends on the coded modulation scheme indicated by SIG-A and the number of spatial streams, lcm {. cndot.) denotes the least common multiple, which is derived from the indication of the NSTS/PAID sub-field of SIG-ASTS。
3) If the PPDU is an OFDM MU-MIMO PPDU, the parameters comprise the number of the space-time streams corresponding to the site and the corresponding position; the calculation method comprises the following steps: firstly, determining a user index number corresponding to the site according to the value of the sub-field GroupID in the SIG-A, and then determining the number N of the space-time streams corresponding to the site according to the NSTS/PAIDSTS,uAnd a corresponding position, wherein u represents the user index number and is an integer between 0 and 3. When u is 0, 1 st to N thSTS,0The space-time stream is the space-time stream sent to user 0, and when u ≠ 0, the second timeTo get it readyThe space-time stream is the space-time stream of user u, wherein NSTS,iFor MU [ i ] in SIG-A]The NSTS subfield indicates the number of space-time streams corresponding to user i.
(5) Judging whether the PPDU is related to the station or not according to the information of the sub-field in the SIG-A, if the PPDU is not related to the station, the receiver does not process the PPDU, waits for a certain time length, returns to the step (1), otherwise, enters the step (6); the specific judgment method comprises the following steps: if any one of the following conditions is satisfied, the PPDU is irrelevant to the station, otherwise, the PPDU is relevant to the station:
1) when GroupID is 0 or 63 (including SC MIMO PPDU and OFDM MIMO PPDU), the receiver indicated by the PAID subfield in SIG-a is not the own station;
2) when the assignment of the GroupID is a certain number between 1 and 62, the site does not belong to a site set corresponding to a group number indicated by the GroupID subfield in SIG-A;
3) when the assignment of the GroupID is a certain number between 1 and 62, the station belongs to a station set corresponding to a packet number indicated by a GroupID subfield in SIG-a, but the value of an MU [ u ] NSTS subfield in SIG-a is 0, that is, the transmitted PPDU does not contain data of the station, and u is a user index number corresponding to the station.
(6) Determining a demodulation mode according to the frame format type of the PPDU, if the PPDU is an SC MIMO PPDU, executing the step (7), if the PPDU is an OFDM MIMO PPDU, executing the step (8), otherwise, executing the step (9);
(7) demodulating a subsequent portion of the PPDU in SC MIMO;
(8) demodulating a subsequent portion of the PPDU in an OFDM SU MIMO manner;
(9) the subsequent portion of the PPDU is demodulated in an OFDM MU-MIMO manner.
The specific steps of the step (7) comprise:
(7.1) if the power of the data field signal is lower than a threshold value which can be processed by the receiver, waiting for a certain time, returning to the step (1), otherwise, receiving and processing the SC symbol block, wherein the process comprises the steps of removing a guard interval, balancing, constellation mapping and de-streaming analysis;
(7.2)NBLK:＝NBLK1, i.e. NBLKIs given to N by subtracting 1 from the value ofBLKIf N is presentBLKIf the value of (2) is greater than 1, returning to the step (7.1), otherwise, entering the step (7.3);
(7.3) reserving N according to the calculation result of the step (4)CW×LCWAnd (2) after the data of each bit is decoded and descrambled by the LDPC decoder, removing zero padding bits of zero padding of the code word, namely obtaining the transmitted data according to the data of the first Length byte of the data stream indicated by the Length subfield of the SIG-A, finishing the receiving process of the PPDU, setting the receiving state to be error-free, waiting for a certain time Length, and returning to the step (1).
The specific steps of the step (8) comprise:
(8.1) estimating the MIMO-OFDM equivalent channel matrix by using the multi-carrier training field to respectively obtain the channel matrix on each subcarrier and the equivalent channel matrix H on the subcarrier kkIs of size NRXLine NSTSColumn, NRXIndicating the number of receiving antennas of the station;
(8.2) if the power of the data field signal is lower than a threshold value which can be processed by the receiver, waiting for a certain time, returning to the step (1), otherwise, receiving the OFDM symbol based on the equivalent channel matrix obtained in the step (8.1), wherein the process comprises the steps of removing a guard interval, balancing, de-LDPC subcarrier mapping, de-constellation mapping and de-streaming analysis, and storing the data after the de-streaming analysis operation into a buffer area;
(8.3)Nsym:＝Nsym1, i.e. NsymIs given to N by subtracting 1 from the value ofsymIf N is presentsymIf not, entering the step (8.4), otherwise, returning to the step (8.2);
and (8.4) decoding the LDPC sequence obtained in the step (8.2), after descrambling, removing zero padding according to the indication of the Length sub-field of the SIG-A, namely, taking the data of the first Length bytes of the data stream to obtain the transmission data, waiting for a certain time Length, and returning to the step (1).
The specific steps of the step (9) comprise:
(9.1) based on the space-time stream position and the space-time stream number of the site obtained in the step (4), estimating an MIMO-OFDM equivalent channel matrix by using a multi-carrier training field to respectively obtain a channel matrix on each subcarrier and an equivalent channel matrix H on a subcarrier kkIs of size NRXLine NSTS,uColumns;
(9.2) the receiver receives and demodulates SIG-B based on the equivalent channel matrix estimated in the step (9.1), CRC is carried out on the SIG-B, if CRC check fails, a certain time duration is waited, the step (1) is returned, and otherwise, the step (9.3) is carried out;
(9.3) if the receiver can process the MCS indicated by the SIG-B, entering the step (9.4), otherwise, waiting for a certain time length, and returning to the step (1);
(9.4) configuring parameters related to the PPDU reception, including length (number of data field payload bytes) and number of data field OFDM symbols N that the receiver needs to demodulatesym，NsymThe calculation method of (2) is as follows:
(formula 4)
In formula 4, NCBPS,uIs derived from the MU MCS in SIG-B of the u-th userSub-fields and MU [ u ] in SIG-A]NSTS subfield decision, LengthuThe value of (a) is equal to the value of the Length field in the SIG-B of the u-th user;
(9.5) if the power of the data field signal is lower than a threshold value which can be processed by the receiver, waiting for a certain time, returning to the step (1), otherwise, receiving an OFDM symbol based on the equivalent channel matrix obtained in the step (9.1), wherein the process comprises the steps of removing a guard interval, balancing, de-LDPC subcarrier mapping, de-constellation mapping and de-streaming analysis, and storing the data of the de-streaming analysis into a buffer area;
(9.6)Nsym:＝Nsym1, i.e. NsymIs given to N by subtracting 1 from the value ofsymIf N is presentsymIf yes, entering step (9.7), otherwise, returning to step (9.5);
(9.7) de-zero-filling the first Length of the data stream according to the indication of the Length sub-field of SIG-B received by the siteuAnd (4) obtaining sending data by using the data of each byte, waiting for a certain time length, and returning to the step (1).
A receiving apparatus of a MIMO communication system compatible with a plurality of frame formats, which employs the above method, comprising: the system comprises a frame detection module, a lead code processing module, a SIG-A field analysis module, a site judgment module, a demodulation selection module, an SC MIMO demodulation module, an OFDM SU MIMO demodulation module and an OFDM MU-MIMO demodulation module; wherein,
the frame detection module is used for placing the radio frequency link into a receiving state when the station does not access a channel, repeatedly detecting frames until the arrival of one frame is detected, and outputting the data of one frame to the lead code processing module;
the lead code processing module is used for receiving frame data output by the frame detection module and finishing carrier frequency synchronization, time synchronization and SC MIMO time domain channel coefficient estimation by using a lead code;
the SIG-A processing module is used for receiving and processing the SIG-A according to the time domain channel coefficient and performing cyclic redundancy check on the SIG-A;
the SIG-A field analysis module is used for analyzing the information of each sub-field in the SIG-A and calculating relevant parameters required by PPDU demodulation;
the station judging module is used for judging whether the received PPDU is related to the station according to the sub-field information obtained by the SIG-A field analyzing module;
a demodulation selection module for selecting a specific PPDU demodulation mode according to the frame format type;
the SC MIMO demodulation module is used for demodulating an SC data field of the PPDU in an SC MIMO mode according to the related parameters obtained by the SIG-A field analysis module;
the OFDM SU MIMO demodulation module is used for demodulating a multi-carrier training field and an OFDM data field of the PPDU in an OFDM (orthogonal frequency division multiplexing) mode according to the related parameters obtained by the SIG-A field analysis module;
and the number of the first and second groups,
and the OFDM MU-MIMO demodulation module is used for demodulating the multi-carrier training field, the SIG-B and the OFDM data field of the PPDU in an OFDM MU-MIMO mode according to the related parameters obtained by the SIG-A field analysis module.
Drawings
FIG. 1 is a general flow diagram of an embodiment of the present invention;
FIG. 2 is a diagram of SIG-A section fields according to an embodiment of the present invention;
fig. 3 is a diagram illustrating a SIG-B part field according to an embodiment of the present invention.
Detailed Description
The techniques of the present invention may be used in a variety of broadband wireless communication systems, and the implemented wireless nodes may include access points or access terminals, examples of such communication systems include millimeter wave wireless multiple-input multiple-output communication systems, and the like.
The following takes a millimeter wave wireless local area network (IEEE 802.11aj)540MHz bandwidth as an example, and the following detailed description is made on a specific implementation of a receiving method and a receiving apparatus of a MIMO communication system compatible with multiple frame formats according to the present invention, where the frame formats include the following three types:
the SC MIMO frame structure, i.e., the structure of SC Preamble (abbreviated SC Preamble), SC SIG-a, and SC data field, may contain SC synchronization training field (abbreviated SC STF), SC channel estimation training field (abbreviated SC CTF), SC SIG-a, SC data field.
The single-user MIMO frame structure, i.e., the structure of SC Preamble (abbreviated SC Preamble), SC SIG-a and OFDM field, may contain SC synchronization training field (abbreviated SC STF), SC channel estimation training field (abbreviated SC CTF), SC SIG-a, OFDM long training field (abbreviated OFDM-LTF) and OFDM data field.
The structure of the multi-user MIMO frame, namely SC Preamble (abbreviated SC Preamble), SC SIG-a and OFDM field, may contain SC synchronization training field (abbreviated SC STF), SC channel estimation training field (abbreviated SC CTF), SC SIG-a, OFDM long training field (abbreviated OFDM-LTF), SIG-B and data field.
In the millimeter wave wireless local area network (IEEE 802.11aj) standard, system-related parameters are defined, as shown in table 1, and these parameters are used directly in the following discussion.
TABLE 1 millimeter wave WLAN related parameters
In the embodiment of the invention, a receiver is configured with 2 antennas, an MCS value adopted by an SC MIMO PPDU is 3, namely, the modulation mode is pi/2-16-QAM, the code rate is transmitted in a mode of 1/2, the length of a single PSDU is 4000 bytes, the number of the adopted space data streams is 2, and the space data streams are transmitted in a non-STBC mode; the MCS value adopted by the OFDM MIMO PPDU is 3, namely the modulation mode is 16-QAM, the code rate is 1/2, the length of a single PSDU is 4000 bytes, the number of the adopted space data streams is 2, and the OFDM MIMO PPDU is sent in a non-STBC mode; in the embodiment of OFDM MU-MIMO PPDU, the PSDU length is 4000 bytes and 6000 bytes, the number of spatial data streams used is 2 and 1, respectively, the receiver is the 0 th user of the PPDU, the MCS value of the 0 th user is 3, that is, the modulation mode is 16-QAM, and the code rate is 1/2. This embodiment explains the processing procedure of the receiver. Scenarios supporting different bandwidths, different numbers of spatial data streams, and different modulation schemes can be obtained by modifying the example in this embodiment.
Fig. 1 is a general flowchart of a receiving method of a MIMO communication system compatible with multiple frame formats according to an embodiment of the present invention, and specific operation steps of the embodiment of the method of the present invention are described in detail below with three examples of receiving one SC MIMO PPDU, one OFDM MIMO PPDU, and one OFDM MU-MIMO pdu, respectively.
Example 1: receiving one SC MIMO PPDU
(A1) A station operating in a certain basic service set, when there is no access channel, putting the radio frequency link into a receiving state, repeating the detection frame until the arrival of a frame is detected, and entering the step (A2);
(A2) the receiver uses the lead code to complete carrier frequency synchronization, time synchronization and SC MIMO time domain channel coefficient estimation;
(A3) after the SIG-a is received and processed based on the time domain channel coefficient obtained in the step (a2), making a cyclic redundancy check on the SIG-a, returning to the step (a1) if the check fails, and entering the step (a4) if the check succeeds;
(A4) resolving the information of each subfield in the SIG-A, wherein the value of the SC/OFDM subfield in the SIG-A is 0 because the received PPDU is SC MIMOPPDU in the example, calculating the relevant parameters required by demodulating the PPDU and the number N of code words of the data fieldCWAnd number of SC symbol blocks NBLKThe calculation steps are as follows:
1) calculating the number of codewords N of a data fieldCW:
From the parameter configuration in the embodimentCW672, Length is indicated by a sub-field Length of SIG-A, 4000, the modulation mode of the PPDU is pi/2-16-QAM indicated by a sub-field SU MCS of SIG-A, the code rate is 1/2, and the method is calculated according to formula 1:
(formula 5)
2) Calculating the number of data field symbol blocks NBLK:
M is configured according to parameters in the embodimentSTBC＝1，NCBPB2048, calculated according to equation 2:
(formula 6)
If the receiver does not support the MCS indicated by the SIG-A, after waiting for a certain time, returning to the step (A1), otherwise, entering the step (A5);
(A5) the receiver judges whether the PPDU is related to the station according to the indication of a sub field NSTS/PAID in SIG-A, if the receiver indicated by PAID sub field in SIG-A is not the station, the PPDU is not related to the station, the receiver does not process the PPDU, waits for a certain time length, returns to the step (A1), otherwise, enters the step (A6);
(A6) if the power of the data field signal is lower than the threshold value which can be processed by the receiver, waiting for a certain time length, returning to the step (A1), otherwise, receiving and processing the SC symbol block, wherein the process comprises the steps of removing a guard interval, balancing, constellation mapping and stream resolution;
(A7)NBLK:＝NBLK1, i.e. NBLKIs given to N by subtracting 1 from the value ofBLKIf N is presentBLKIf the value of (A) is more than 1, returning to the step (A6), otherwise, entering the step (A8);
(A8) and (C) reserving 64512 bits of data according to the calculation result of the step (A4), removing zero padding bits of code word zero padding after decoding and descrambling by the LDPC decoder, namely acquiring the transmitted data according to the data of the first Length byte of the data stream indicated by the Length subfield of SIG-A, ending the receiving process of PPDU, setting the receiving state to be error-free, waiting for a certain time Length, and returning to the step (A1).
Example 2: receiving an OFDM MIMO PPDU
(B1) A station operating in a certain basic service set, when there is no access channel, the radio frequency link is set in a receiving state, the detection frame is repeated until the arrival of a frame is detected, and the step (B2) is entered;
(B2) the receiver uses the lead code to complete carrier frequency synchronization, time synchronization and SC MIMO time domain channel coefficient estimation;
(B3) after the SIG-A is received and processed based on the time domain channel coefficient obtained in the step (B2), performing cyclic redundancy check on the SIG-A, if the check fails, returning to the step (B1), and if the check succeeds, entering the step (B4);
(B4) analyzing the information of each sub-field in SIG-A, calculating the related parameters needed for demodulating PPDU, and the number N of OFDM symbols of data fieldsymThe calculation process of (2) is as follows:
from the parameter configuration in the examples, LCW672, 4000 is indicated by the SIG-A sub-field Length, 16-QAM is indicated by the SIG-A sub-field SU MCS, 1/2 is indicated by the SIG-A sub-field SU NSTS, and N is indicated by the SIG-A sub-field SU NSTSSTS2, so NCBPS1344, calculated according to equation 3:
(formula 7)
If the receiver does not support the MCS indicated by the SIG-A, after waiting for a certain time, returning to the step (B1), otherwise, entering the step (B5);
(B5) the receiver judges whether the PPDU is related to the station according to the indication of a sub field NSTS/PAID in SIG-A, if the receiver indicated by PAID sub field in SIG-A is not the station, the PPDU is not related to the station, the receiver does not process the PPDU, waits for a certain time length, returns to the step (B1), otherwise, enters the step (B6);
(B6) estimating MIMO-OFDM equivalent channel matrix by using multi-carrier training field to respectively obtain channel matrix on each subcarrier and equivalent channel matrix H on subcarrier kkIs 2 rows and 2 columns;
(B7) if the power of the data field signal is lower than the threshold value which can be processed by the receiver, waiting for a certain time, returning to the step (B1), otherwise, receiving the OFDM symbol based on the equivalent channel matrix obtained in the step (B6), wherein the process comprises the steps of removing a guard interval, balancing, de-LDPC subcarrier mapping, de-constellation mapping and de-streaming analysis, and storing the data after the de-streaming analysis operation into a buffer area;
(B8)Nsym:＝Nsym1, i.e. NsymIs given to N by subtracting 1 from the value ofsymIf N is presentsymIf yes, entering the step (B9), otherwise, returning to the step (B7);
(B9) and (C) decoding the sequence LDPC obtained in the step (B7), after descrambling, removing zero padding according to the indication of the Length sub-field of the SIG-A, namely, taking the data of the first 4000 bytes of the data stream to obtain the transmission data, waiting for a certain time Length, and returning to the step (B1).
Example 3: receiving an OFDM MU-MIMO PPDU
(C1) A station operating in a certain basic service set, when there is no access channel, putting the radio frequency link into a receiving state, repeating the detection frame until the arrival of a frame is detected, and entering the step (C2);
(C2) the receiver uses the lead code to complete carrier frequency synchronization, time synchronization and SC MIMO time domain channel coefficient estimation;
(C3) after the SIG-A is received and processed based on the time domain channel coefficient obtained in the step (C2), performing cyclic redundancy check on the SIG-A, if the check fails, returning to the step (C1), and if the check succeeds, entering the step (C4);
(C4) analyzing information of each subfield in SIG-A, in this example, sub-field SC/OFDM of SIG-A is 1, and sub-field group ID is assigned to a certain number between 1 and 62, determining that the station is the 0 th user of OFDM MU-MIMO PPDU according to the value of sub-field group ID in SIG-A, then determining that the number of space-time streams corresponding to the station is 2 according to NSTS/PAID, and the position is from space-time stream 1 to space-time stream 2, if the receiver does not support MCS indicated by SIG-A, after waiting for a certain time, returning to step (C1), otherwise, entering step (C5);
(C5) the receiver judges whether the PPDU is related to the station according to the indication of the sub-fields GroupID and NSTS/PAID in the SIG-A, and meets any one of the following conditions:
1) the site does not belong to a site set corresponding to a group number indicated by a group subfield in SIG-A;
2) if the station belongs to the station set corresponding to the packet number indicated by the GroupID subfield in the SIG-a, but the value of the MU [0] NSTS subfield in the SIG-a is 0, that is, the transmitted PPDU does not contain the data of the station.
If the PPDU is not related to the station, the receiver does not process the PPDU, waits for a certain time, and returns to the step (C1), otherwise, the step (C6) is performed, and the step (C6) is performed if the condition is not met in this example;
(C6) based on the space-time stream position and the space-time stream number of the site obtained in the step (C4), estimating the MIMO-OFDM equivalent channel matrix by using the multi-carrier training field, and obtaining the channel matrix on each subcarrier and the equivalent channel on the subcarrier k respectivelyMatrix HkIs 2 rows and 2 columns;
(C7) the receiver receives and demodulates SIG-B based on the equivalent channel matrix estimated in the step (C6), wherein the specific structure of SIG-B is shown in FIG. 3, CRC is carried out on SIG-B, if CRC fails, a certain time length is waited, the step (C1) is returned, and otherwise, the step (C8) is carried out;
(C8) if the receiver can process the MCS indicated by the SIG-B, entering the step (C9), otherwise, waiting for a certain time length, and returning to the step (C1);
(C9) configuring parameters related to PPDU reception, including length (number of data field payload bytes) and number of data field OFDM symbols N to be demodulated by receiversym，NsymThe calculation method of (2) is as follows:
from the parameter configuration in the examples, LCW672, Length is indicated by the sub-field Length in SIG-B04000, the sub-field MCS in SIG-B indicates that the PPDU has a modulation scheme of 16-QAM, a code rate of 1/2, and a sub-field MU [0] in SIG-a]NSTS indication NSTS2, so NCBPS,01344, calculated according to equation 4:
(formula 8)
(C10) If the power of the data field signal is lower than the threshold value which can be processed by the receiver, waiting for a certain time, returning to the step (C1), otherwise, receiving an OFDM symbol based on the equivalent channel matrix obtained in the step (C6), wherein the process comprises the steps of removing a guard interval, balancing, de-LDPC subcarrier mapping, de-constellation mapping and de-streaming analysis, and storing the data of the de-streaming analysis into a buffer area;
(C11)Nsym:＝Nsym1, i.e. NsymIs given to N by subtracting 1 from the value ofsymIf N is presentsymIf yes, entering the step (C12), otherwise, returning to the step (C10);
(C12) and according to the indication of the Length sub-field of the SIG-B received by the site, zero padding is carried out, namely the data of the first 4000 bytes of the data stream is obtained, the sending data is obtained, a certain time Length is waited, and the step (C1) is returned.
The embodiment of the invention also provides a receiving device of the MIMO communication system compatible with various frame formats, which adopts the method and comprises the following steps: the system comprises a frame detection module, a lead code processing module, a SIG-A field analysis module, a site judgment module, a demodulation selection module, an SC MIMO demodulation module, an OFDM SU MIMO demodulation module and an OFDM MU-MIMO demodulation module; wherein,
the frame detection module is used for placing the radio frequency link into a receiving state when the station does not access a channel, repeatedly detecting frames until the arrival of one frame is detected, and outputting the data of one frame to the lead code processing module;
the lead code processing module is used for receiving frame data output by the frame detection module and finishing carrier frequency synchronization, time synchronization and SC MIMO time domain channel coefficient estimation by using a lead code;
the SIG-A processing module is used for receiving and processing the SIG-A according to the time domain channel coefficient and performing cyclic redundancy check on the SIG-A;
the SIG-A field analysis module is used for analyzing the information of each sub-field in the SIG-A and calculating relevant parameters required by PPDU demodulation;
the station judging module is used for judging whether the received PPDU is related to the station according to the sub-field information obtained by the SIG-A field analyzing module;
a demodulation selection module for selecting a specific PPDU demodulation mode according to the frame format type;
the SC MIMO demodulation module is used for demodulating an SC data field of the PPDU in an SC MIMO mode according to the related parameters obtained by the SIG-A field analysis module;
the OFDM SU MIMO demodulation module is used for demodulating a multi-carrier training field and an OFDM data field of the PPDU in an OFDM (orthogonal frequency division multiplexing) mode according to the related parameters obtained by the SIG-A field analysis module;
and the number of the first and second groups,
and the OFDM MU-MIMO demodulation module is used for demodulating the multi-carrier training field, the SIG-B and the OFDM data field of the PPDU in an OFDM MU-MIMO mode according to the related parameters obtained by the SIG-A field analysis module.

Claims (9)

1. A receiving method of a multiple-input multiple-output (MIMO) communication system compatible with a plurality of frame formats, a frame structure of a physical layer protocol data unit (PPDU) of the MIMO communication system comprising:
a Single Carrier (SC) MIMO PPDU frame structure comprising an SC preamble, an SC signaling field A (SIG-A), and an SC data field;
an Orthogonal Frequency Division Multiplexing (OFDM) MIMO PPDU frame structure comprising an SC preamble, an SC SIG-A, a multi-carrier training field and an OFDM data field; and the number of the first and second groups,
an OFDM MU-MIMO PPDU frame structure comprising an SC preamble, an SC SIG-A, a multi-carrier training field, a signaling field B (SIG-B), and an OFDM data field;
the receiving method is characterized by comprising the following steps:
(1) a station operating under a certain basic service set, when no access channel exists, the radio frequency link is placed in a receiving state, the frame detection is repeated until the arrival of a frame is detected, and the step (2) is entered;
(2) the receiver uses the lead code to complete carrier frequency synchronization, time synchronization and SC MIMO time domain channel coefficient estimation;
(3) after the SIG-A is received and processed based on the time domain channel coefficient obtained in the step (2), performing Cyclic Redundancy Check (CRC) on the SIG-A, if the check fails, returning to the step (1), and if the check succeeds, entering the step (4);
(4) analyzing the information of each subfield in the SIG-A, judging the frame format type of the PPDU according to the SC/OFDM subfield and the GroupID subfield in the SIG-A, calculating relevant parameters required by the PPDU demodulation aiming at the specific frame format type, if a receiver does not support a Modulation Coding Scheme (MCS) indicated by the SIG-A, returning to the step (1) after waiting for a certain time, otherwise, entering the step (5);
the relevant parameters are specifically:
if the PPDU is an SC MIMO PPDU, the number of codewords N comprising the data fieldCWAnd number of SC symbol blocks NBLK；
If the PPDU is an OFDM MIMO PPDU, the number of OFDM symbols N comprising the data fieldsym；
If the PPDU is an OFDM MU-MIMO PPDU, the number of the space-time streams corresponding to the station and the corresponding position are included;
(5) judging whether the PPDU is related to the station or not according to the information of the sub-field in the SIG-A, if the PPDU is not related to the station, the receiver does not process the PPDU, waits for a certain time length, returns to the step (1), otherwise, enters the step (6);
(6) determining a demodulation mode according to the frame format type of the PPDU, if the PPDU is an SC MIMO PPDU, executing the step (7), if the PPDU is an OFDM MIMO PPDU, executing the step (8), otherwise, executing the step (9);
(7) demodulating a subsequent portion of the PPDU in SC MIMO;
(8) demodulating a subsequent portion of the PPDU in an OFDM SU MIMO manner;
(9) the subsequent portion of the PPDU is demodulated in an OFDM MU-MIMO manner.
2. The receiving method of the MIMO communication system compatible with multiple frame formats according to claim 1, wherein:
number of codewords N of the data fieldCWThe calculation formula of (2) is as follows:
in equation 1, Length is SIG-A and represents the sub-field of the PPDU data payload, the unit is byte, LCWAnd R represents the code length and code rate of the low density parity check coding codeword, respectively;
the number of SC symbol blocks NBLKThe calculation formula of (2) is as follows:
in formula 2, NCBPBThe coding bit number of each symbol block of the data field, the value is determined by the coding modulation scheme indicated by SIG-A and the number of spatial streams, when the PPDU is transmitted by non-STBC, mSTBCWhen the PPDU is transmitted in STBC mode, m is 1STBCWhen the PPDU is transmitted in the quasi-orthogonal STBC scheme, m is 2STBC＝4。
3. The receiving method of the MIMO communication system compatible with multiple frame formats according to claim 1, wherein:
number of OFDM symbols N of the data fieldsymThe calculation formula of (2) is as follows:
in formula 3, NCBPSRepresenting the number of coded bits in each OFDM symbol, NCBPSThe value depends on the coded modulation scheme indicated by SIG-A and the number of spatial streams, lcm {. cndot.) denotes the least common multiple, which is derived from the indication of the NSTS/PAID sub-field of SIG-ASTS，LCWAnd R represents the code length and code rate of the LDPC coded codeword, respectively, and m is the code length and code rate of the LDPC coded codeword when the PPDU is transmitted for non-STBC transmissionSTBCWhen the PPDU is transmitted in STBC mode, m is 1STBCWhen the PPDU is transmitted in the quasi-orthogonal STBC scheme, m is 2STBC＝4。
4. The receiving method of the MIMO communication system compatible with multiple frame formats according to claim 1, wherein:
the method for calculating the number of the space-time streams and the corresponding positions corresponding to the site comprises the following steps: firstly, determining a user index number corresponding to the site according to the value of the sub-field GroupID in the SIG-A, and then determining the number N of the space-time streams corresponding to the site according to the NSTS/PAIDSTS,uAnd corresponding position, u represents the user index number; when u is 0, 1 st to N thSTS,0The space-time stream is the space-time stream sent to user 0, and when u ≠ 0, the second timeTo get it readyThe space-time stream is the space-time stream of user u, wherein NSTS,iFor MU [ i ] in SIG-A]The NSTS subfield indicates the number of space-time streams corresponding to user i.
5. The receiving method of the MIMO communication system compatible with multiple frame formats according to claim 1, wherein the specific method for determining whether the PPDU is related to the station according to the information of the sub-field in the SIG-a in step (5) is: if any one of the following conditions is satisfied, the PPDU is irrelevant to the station, otherwise, the PPDU is relevant to the station:
the receiver judges whether the PPDU is related to the station according to the indication of the sub-fields GroupID and NSTS/PAID in the SIG-A, and any one of the following conditions is satisfied:
when GroupID is 0 or 63, the recipient indicated by the PAID subfield in SIG-a is not the own station;
when the assignment of the GroupID is a certain number between 1 and 62, the site does not belong to a site set corresponding to a group number indicated by the GroupID subfield in SIG-A;
when the value of the GroupID is a certain number between 1 and 62, the station belongs to a station set corresponding to a packet number indicated by the GroupID subfield in the SIG-a, but the value of the MU [ u ] NSTS subfield in the SIG-a is 0, and u is the index number of a user corresponding to the station.
6. The receiving method of the MIMO communication system compatible with multiple frame formats according to claim 1, wherein the specific step of the step (7) comprises:
(7.1) if the power of the data field signal is lower than a threshold value which can be processed by the receiver, waiting for a certain time, returning to the step (1), otherwise, receiving and processing the SC symbol block, wherein the process comprises the steps of removing a guard interval, balancing, constellation mapping and de-streaming analysis;
(7.2) adding NBLKIs given to N by subtracting 1 from the value ofBLKIf N is presentBLKIf the value of (2) is greater than 1, returning to the step (7.1), otherwise, entering the step (7.3);
(7.3) reserving N according to the calculation result of the step (4)CW×LCWAnd (3) after decoding and descrambling the data of each bit by the LDPC decoder, removing zero padding bits of zero padding of the code words to obtain the transmitted data, ending the receiving process of the PPDU, setting the receiving state to be error-free, waiting for a certain time length, and returning to the step (1).
7. The receiving method of the MIMO communication system compatible with multiple frame formats according to claim 1, wherein the specific step of the step (8) comprises:
(8.1) advantageEstimating MIMO-OFDM equivalent channel matrix by using multi-carrier training field to respectively obtain channel matrix on each subcarrier and equivalent channel matrix H on subcarrier kkIs of size NRXLine NSTSColumn, NRXIndicating the number of receiving antennas of the station;
(8.2) if the power of the data field signal is lower than a threshold value which can be processed by the receiver, waiting for a certain time, returning to the step (1), otherwise, receiving the OFDM symbol based on the equivalent channel matrix obtained in the step (8.1), wherein the process comprises the steps of removing a guard interval, balancing, de-LDPC subcarrier mapping, de-constellation mapping and de-streaming analysis, and storing the data after the de-streaming analysis operation into a buffer area;
(8.3) adding NsymIs given to N by subtracting 1 from the value ofsymIf N is presentsymIf not, entering the step (8.4), otherwise, returning to the step (8.2);
and (8.4) decoding the sequence LDPC obtained in the step (8.2), after descrambling, removing zero padding according to the indication of the Length subfield of the SIG-A to obtain sending data, waiting for a certain time Length, and returning to the step (1).
8. The receiving method of the MIMO communication system compatible with multiple frame formats according to claim 1, wherein the specific step of the step (9) comprises:
(9.1) based on the space-time stream position and the space-time stream number of the site obtained in the step (4), estimating an MIMO-OFDM equivalent channel matrix by using a multi-carrier training field to respectively obtain a channel matrix on each subcarrier and an equivalent channel matrix H on a subcarrier kkIs of size NRXLine NSTS,uColumns;
(9.2) the receiver receives and demodulates SIG-B based on the equivalent channel matrix estimated in the step (9.1), CRC is carried out on the SIG-B, if CRC check fails, a certain time duration is waited, the step (1) is returned, and otherwise, the step (9.3) is carried out;
(9.3) if the receiver can process the MCS indicated by the SIG-B, entering the step (9.4), otherwise, waiting for a certain time length, and returning to the step (1);
(9.4) configuring parameters related to the PPDU reception, including data field loadingNumber of bytes and number of OFDM symbols of data field needing demodulation by receiversym，NsymThe calculation method of (2) is as follows:
in formula 4, NCBPS,uIs derived from the MU MCS subfield in SIG-B and MU [ u ] in SIG-A of the u-th user]NSTS subfield decision, LengthuThe value of (a) is equal to the value of the Length field in the SIG-B of the u-th user;
(9.5) if the power of the data field signal is lower than a threshold value which can be processed by the receiver, waiting for a certain time, returning to the step (1), otherwise, receiving an OFDM symbol based on the equivalent channel matrix obtained in the step (9.1), wherein the process comprises the steps of removing a guard interval, balancing, de-LDPC subcarrier mapping, de-constellation mapping and de-streaming analysis, and storing the data of the de-streaming analysis into a buffer area;
(9.6) adding NsymIs given to N by subtracting 1 from the value ofsymIf N is presentsymIf yes, entering step (9.7), otherwise, returning to step (9.5);
and (9.7) according to the indication of the Length subfield of the SIG-B received by the site, carrying out zero padding to obtain sending data, waiting for a certain time Length, and returning to the step (1).
9. A receiving apparatus of a MIMO communication system compatible with a plurality of frame formats, which employs the receiving method of the MIMO communication system compatible with a plurality of frame formats according to any one of claims 1 to 8, comprising: the system comprises a frame detection module, a lead code processing module, a SIG-A field analysis module, a site judgment module, a demodulation selection module, an SC MIMO demodulation module, an OFDM SU MIMO demodulation module and an OFDM MU-MIMO demodulation module; wherein,
the frame detection module is used for placing the radio frequency link into a receiving state when the station does not access a channel, repeatedly detecting frames until the arrival of one frame is detected, and outputting the data of one frame to the lead code processing module;
the lead code processing module is used for receiving frame data output by the frame detection module and finishing carrier frequency synchronization, time synchronization and SC MIMO time domain channel coefficient estimation by using a lead code;
the SIG-A processing module is used for receiving and processing the SIG-A according to the time domain channel coefficient and performing cyclic redundancy check on the SIG-A;
the SIG-A field analysis module is used for analyzing the information of each sub-field in the SIG-A and calculating relevant parameters required by PPDU demodulation;
the station judging module is used for judging whether the received PPDU is related to the station according to the sub-field information obtained by the SIG-A field analyzing module;
a demodulation selection module for selecting a specific PPDU demodulation mode according to the frame format type;
the SC MIMO demodulation module is used for demodulating an SC data field of the PPDU in an SC MIMO mode according to the related parameters obtained by the SIG-A field analysis module;
the OFDM SU MIMO demodulation module is used for demodulating a multi-carrier training field and an OFDM data field of the PPDU in an OFDM (orthogonal frequency division multiplexing) mode according to the related parameters obtained by the SIG-A field analysis module;
and the number of the first and second groups,
and the OFDM MU-MIMO demodulation module is used for demodulating the multi-carrier training field, the SIG-B and the OFDM data field of the PPDU in an OFDM MU-MIMO mode according to the related parameters obtained by the SIG-A field analysis module.
CN201410564348.3A 2014-10-21 2014-10-21 A kind of method of reseptance and device of the MIMO communication system of compatible a variety of frame formats Active CN104363192B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201410564348.3A CN104363192B (en) 2014-10-21 2014-10-21 A kind of method of reseptance and device of the MIMO communication system of compatible a variety of frame formats

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201410564348.3A CN104363192B (en) 2014-10-21 2014-10-21 A kind of method of reseptance and device of the MIMO communication system of compatible a variety of frame formats

Publications (2)

Publication Number Publication Date
CN104363192A true CN104363192A (en) 2015-02-18
CN104363192B CN104363192B (en) 2017-10-31

Family

ID=52530418

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201410564348.3A Active CN104363192B (en) 2014-10-21 2014-10-21 A kind of method of reseptance and device of the MIMO communication system of compatible a variety of frame formats

Country Status (1)

Country Link
CN (1) CN104363192B (en)

Cited By (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104836652A (en) * 2015-05-11 2015-08-12 西南石油大学 Space time block coding (STBC) multiple input multiple output-orthogonal frequency division multiplexing (MIMO-OFDM) system time frequency synchronization new method under low signal to noise ratio
CN105099621A (en) * 2015-06-29 2015-11-25 魅族科技（中国）有限公司 Communication method and communication equipment
CN105472762A (en) * 2016-01-08 2016-04-06 宇龙计算机通信科技(深圳)有限公司 Random access method, random access apparatus and terminal
CN105471793A (en) * 2014-09-30 2016-04-06 德克萨斯仪器股份有限公司 System and method for generating frame structure for MIMO narrowband power line communications
WO2016176877A1 (en) * 2015-05-05 2016-11-10 华为技术有限公司 Transmission method and device for physical layer protocol data unit
WO2017076020A1 (en) * 2015-11-06 2017-05-11 华为技术有限公司 Ppdu transmission method and apparatus, wireless access point, and station
CN106888179A (en) * 2017-03-30 2017-06-23 上海无疆信息科技有限公司 A kind of channel estimation methods towards WLAN compatibility different frame formats
WO2017206963A1 (en) * 2016-06-03 2017-12-07 中兴通讯股份有限公司 Method and apparatus for sending and processing data unit, and station
CN107529354A (en) * 2015-03-31 2017-12-29 华为技术有限公司 A kind of data transmission method and transmitting device
CN107534897A (en) * 2015-03-06 2018-01-02 交互数字专利控股公司 For WLAN（WLAN）The method and system of long symbol duration migration
CN107534471A (en) * 2015-04-30 2018-01-02 英特尔Ip公司 Transmit the devices, systems, and methods of the wireless communication frame with head
CN107634824A (en) * 2016-07-19 2018-01-26 华为技术有限公司 The method and apparatus of transmission signal
CN107735995A (en) * 2015-07-09 2018-02-23 华为技术有限公司 A kind of data detection method and device
CN107852291A (en) * 2015-07-08 2018-03-27 英特尔Ip公司 Using directive sending and receive the method to be communicated and user equipment（UE）
CN107950029A (en) * 2015-09-10 2018-04-20 Lg 电子株式会社 Broadcast singal dispensing device, broadcast receiver, broadcast singal sending method and broadcast signal received method
CN108141318A (en) * 2015-10-19 2018-06-08 亚马电子有限公司 The transceiver of simultaneous asynchronous data transmissions is carried out by noisy communication channel
CN109218243A (en) * 2017-07-04 2019-01-15 华为技术有限公司 A kind of data processing method and device
CN109565495A (en) * 2016-09-09 2019-04-02 英特尔公司 Symbol piecemeal and protection interval for wireless network
CN109756258A (en) * 2017-11-07 2019-05-14 华为技术有限公司 Wave beam training method and device
CN110351063A (en) * 2015-07-01 2019-10-18 松下知识产权经营株式会社 Terminal station and method of reseptance
CN110431814A (en) * 2017-03-27 2019-11-08 英特尔Ip公司 Utilize the devices, systems, and methods of head B field transmission EDMG MU PPDU
WO2019214212A1 (en) * 2018-05-07 2019-11-14 华为技术有限公司 Data transmission method, device and storage medium
CN110637448A (en) * 2017-04-20 2019-12-31 Lg 电子株式会社 Method for transmitting and receiving signal in wireless LAN system and apparatus for the same
CN110651456A (en) * 2017-04-19 2020-01-03 Lg 电子株式会社 Method for transmitting and receiving signal in wireless LAN system and apparatus for the same
WO2020187208A1 (en) * 2019-03-18 2020-09-24 华为技术有限公司 Information indication method and device, and data transmission system
CN112187427A (en) * 2015-06-10 2021-01-05 华为技术有限公司 Method and device for transmitting physical layer protocol data unit
WO2021031780A1 (en) * 2019-08-22 2021-02-25 中兴通讯股份有限公司 Data frame detection method and apparatus, and storage medium
CN112491501A (en) * 2015-06-03 2021-03-12 松下知识产权经营株式会社 Transmission device and transmission method for collecting physical layer protocol data unit
CN113037448A (en) * 2015-08-07 2021-06-25 纽瑞科姆有限公司 Control information for multi-user transmission in a WLAN system
CN113259043A (en) * 2021-05-18 2021-08-13 力同科技股份有限公司 Data processing method and device for frame synchronization, communication system and communication device
US11337219B2 (en) 2017-06-19 2022-05-17 Intel Corporation Apparatus, system and method of encoding a wireless transmission
CN114510212A (en) * 2021-12-31 2022-05-17 赛因芯微(北京)电子科技有限公司 Data transmission method, device and equipment based on serial digital audio interface
CN114900211A (en) * 2016-11-02 2022-08-12 松下电器（美国）知识产权公司 Communication apparatus and communication method
CN116318583A (en) * 2018-07-09 2023-06-23 华为技术有限公司 Signaling field indication method and device

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1295749A (en) * 1998-12-14 2001-05-16 诺基亚网络有限公司 Reception method and receiver using several different transpost formats
CN1668030A (en) * 2004-03-09 2005-09-14 阿尔卡特公司 System and a method for processing field frames for multiprotocol use in a communications
CN1951069A (en) * 2004-06-14 2007-04-18 三星电子株式会社 Method for configuring signals corresponding to adaptative packet format
EP1737258B1 (en) * 2005-06-24 2009-08-26 Broadcom Corporation Programmable transmitter
US20100008346A1 (en) * 2007-04-27 2010-01-14 Naganori Shirakata Signal judgment apparatus and signal judgment method
US20100310002A1 (en) * 2009-06-05 2010-12-09 Broadcom Corporation Adaptive and selective frame formats within multiple user, multiple access, and/or mimo wireless communications
US8718173B2 (en) * 2010-02-12 2014-05-06 Lg Electronics Inc. Method for transmitting control information and apparatus for the same
CN103986684A (en) * 2014-05-30 2014-08-13 江苏中兴微通信息科技有限公司 Frame scrambling and descrambling method in MIMO wireless communication system and communication device thereof
CN103986682A (en) * 2014-05-30 2014-08-13 江苏中兴微通信息科技有限公司 Signaling field and communication method of wireless MIMO communication system
CN104065454A (en) * 2014-06-20 2014-09-24 江苏中兴微通信息科技有限公司 Dynamic symbol interweaving and de-interleaving method and device based on spatial data flow numbers

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1295749A (en) * 1998-12-14 2001-05-16 诺基亚网络有限公司 Reception method and receiver using several different transpost formats
CN1668030A (en) * 2004-03-09 2005-09-14 阿尔卡特公司 System and a method for processing field frames for multiprotocol use in a communications
CN1951069A (en) * 2004-06-14 2007-04-18 三星电子株式会社 Method for configuring signals corresponding to adaptative packet format
EP1737258B1 (en) * 2005-06-24 2009-08-26 Broadcom Corporation Programmable transmitter
US20100008346A1 (en) * 2007-04-27 2010-01-14 Naganori Shirakata Signal judgment apparatus and signal judgment method
US20100310002A1 (en) * 2009-06-05 2010-12-09 Broadcom Corporation Adaptive and selective frame formats within multiple user, multiple access, and/or mimo wireless communications
US8718173B2 (en) * 2010-02-12 2014-05-06 Lg Electronics Inc. Method for transmitting control information and apparatus for the same
CN103986684A (en) * 2014-05-30 2014-08-13 江苏中兴微通信息科技有限公司 Frame scrambling and descrambling method in MIMO wireless communication system and communication device thereof
CN103986682A (en) * 2014-05-30 2014-08-13 江苏中兴微通信息科技有限公司 Signaling field and communication method of wireless MIMO communication system
CN104065454A (en) * 2014-06-20 2014-09-24 江苏中兴微通信息科技有限公司 Dynamic symbol interweaving and de-interleaving method and device based on spatial data flow numbers

Cited By (79)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105471793A (en) * 2014-09-30 2016-04-06 德克萨斯仪器股份有限公司 System and method for generating frame structure for MIMO narrowband power line communications
CN105471793B (en) * 2014-09-30 2020-07-10 德克萨斯仪器股份有限公司 System and method for generating frame structure for MIMO narrowband power line communication
CN107534897B (en) * 2015-03-06 2021-05-28 交互数字专利控股公司 Method and system for Wireless Local Area Network (WLAN) long symbol duration migration
CN113507344A (en) * 2015-03-06 2021-10-15 交互数字专利控股公司 Method and system for wireless local area network long symbol duration migration
US11121813B2 (en) 2015-03-06 2021-09-14 Interdigital Patent Holdings, Inc. Method and system for wireless local area network (WLAN) long symbol duration migration
US11750323B2 (en) 2015-03-06 2023-09-05 Interdigital Patent Holdings, Inc. Method and system for wireless local area network (WLAN) long symbol duration migration
CN107534897A (en) * 2015-03-06 2018-01-02 交互数字专利控股公司 For WLAN（WLAN）The method and system of long symbol duration migration
CN107529354A (en) * 2015-03-31 2017-12-29 华为技术有限公司 A kind of data transmission method and transmitting device
CN107529354B (en) * 2015-03-31 2020-02-14 华为技术有限公司 Data transmission method and transmission device
CN107534471B (en) * 2015-04-30 2021-08-20 英特尔公司 Apparatus and method for transferring wireless communication frame with header
CN107534471A (en) * 2015-04-30 2018-01-02 英特尔Ip公司 Transmit the devices, systems, and methods of the wireless communication frame with head
WO2016176877A1 (en) * 2015-05-05 2016-11-10 华为技术有限公司 Transmission method and device for physical layer protocol data unit
US11784864B2 (en) 2015-05-05 2023-10-10 Huawei Technologies Co., Ltd. Physical layer protocol data unit transmission method and apparatus
US11398938B2 (en) 2015-05-05 2022-07-26 Huawei Technologies Co., Ltd. Physical layer protocol data unit transmission method and apparatus
US10812307B2 (en) 2015-05-05 2020-10-20 Huawei Technologies Co., Ltd. Physical layer protocol data unit transmission method and apparatus
US10812306B2 (en) 2015-05-05 2020-10-20 Huawei Technologies Co., Ltd. Physical layer protocol data unit transmission method and apparatus
CN104836652B (en) * 2015-05-11 2017-12-08 西南石油大学 A kind of space-time block code MIMO ofdm system Time and Frequency Synchronization new methods under low signal-to-noise ratio
CN104836652A (en) * 2015-05-11 2015-08-12 西南石油大学 Space time block coding (STBC) multiple input multiple output-orthogonal frequency division multiplexing (MIMO-OFDM) system time frequency synchronization new method under low signal to noise ratio
CN112491501A (en) * 2015-06-03 2021-03-12 松下知识产权经营株式会社 Transmission device and transmission method for collecting physical layer protocol data unit
US11968070B2 (en) 2015-06-03 2024-04-23 Apple Inc. Technologies for transmitting or receiving an aggregate physical layer protocol data unit
CN112491501B (en) * 2015-06-03 2024-05-14 苹果公司 Transmission device and transmission method for integrated physical layer protocol data unit
CN112187427B (en) * 2015-06-10 2021-08-13 华为技术有限公司 Method and device for transmitting physical layer protocol data unit
CN112187427A (en) * 2015-06-10 2021-01-05 华为技术有限公司 Method and device for transmitting physical layer protocol data unit
CN105099621B (en) * 2015-06-29 2018-05-22 珠海市魅族科技有限公司 Communication means and communication equipment
CN105099621A (en) * 2015-06-29 2015-11-25 魅族科技（中国）有限公司 Communication method and communication equipment
WO2017000725A1 (en) * 2015-06-29 2017-01-05 珠海市魅族科技有限公司 Communication method and communication device
US10601540B2 (en) 2015-06-29 2020-03-24 Meizu Technology Co., Ltd. Communication method and communication device
CN110351063A (en) * 2015-07-01 2019-10-18 松下知识产权经营株式会社 Terminal station and method of reseptance
CN107852291B (en) * 2015-07-08 2021-02-19 苹果公司 Method and User Equipment (UE) for communication using directional transmission and reception
US11265053B2 (en) 2015-07-08 2022-03-01 Apple Inc. User equipment (UE) and methods for communication using directional transmission and reception
CN107852291A (en) * 2015-07-08 2018-03-27 英特尔Ip公司 Using directive sending and receive the method to be communicated and user equipment（UE）
CN107735995B (en) * 2015-07-09 2020-04-14 华为技术有限公司 Data detection method and device
CN107735995A (en) * 2015-07-09 2018-02-23 华为技术有限公司 A kind of data detection method and device
CN113037448A (en) * 2015-08-07 2021-06-25 纽瑞科姆有限公司 Control information for multi-user transmission in a WLAN system
CN113037448B (en) * 2015-08-07 2023-11-21 纽瑞科姆有限公司 Control information for multi-user transmission in WLAN systems
US10728075B2 (en) 2015-09-10 2020-07-28 Lg Electronics Inc. Apparatus for receiving broadcast signals and method for receiving broadcast signals
CN107950029B (en) * 2015-09-10 2020-07-03 Lg 电子株式会社 Broadcast signal transmitting apparatus and method, and broadcast signal receiving apparatus and method
CN107950029A (en) * 2015-09-10 2018-04-20 Lg 电子株式会社 Broadcast singal dispensing device, broadcast receiver, broadcast singal sending method and broadcast signal received method
US11165618B2 (en) 2015-09-10 2021-11-02 Lg Electronics Inc. Apparatus for receiving broadcast signals and method for receiving broadcast signals
CN108141318A (en) * 2015-10-19 2018-06-08 亚马电子有限公司 The transceiver of simultaneous asynchronous data transmissions is carried out by noisy communication channel
CN108141318B (en) * 2015-10-19 2021-03-02 亚马电子有限公司 Method and transceiver for asynchronous data transmission over noisy channels
CN106685578B (en) * 2015-11-06 2020-04-28 华为技术有限公司 PPDU transmission method and device, wireless access point and station
WO2017076020A1 (en) * 2015-11-06 2017-05-11 华为技术有限公司 Ppdu transmission method and apparatus, wireless access point, and station
CN106685578A (en) * 2015-11-06 2017-05-17 华为技术有限公司 PPDU transmission method and device, wireless access point, and station
CN105472762A (en) * 2016-01-08 2016-04-06 宇龙计算机通信科技(深圳)有限公司 Random access method, random access apparatus and terminal
CN105472762B (en) * 2016-01-08 2019-06-11 宇龙计算机通信科技(深圳)有限公司 Accidental access method, accidental access device and terminal
WO2017206963A1 (en) * 2016-06-03 2017-12-07 中兴通讯股份有限公司 Method and apparatus for sending and processing data unit, and station
CN107634824B (en) * 2016-07-19 2021-02-12 华为技术有限公司 Method and device for transmitting signals
US11444818B2 (en) 2016-07-19 2022-09-13 Huawei Technologies Co., Ltd. Signal transmission method and apparatus
CN107634824A (en) * 2016-07-19 2018-01-26 华为技术有限公司 The method and apparatus of transmission signal
US10819555B2 (en) 2016-07-19 2020-10-27 Huawei Technologies Co., Ltd. Signal transmission method and apparatus
CN109565495B (en) * 2016-09-09 2022-07-12 英特尔公司 Symbol blocking and guard interval for wireless networks
CN109565495A (en) * 2016-09-09 2019-04-02 英特尔公司 Symbol piecemeal and protection interval for wireless network
CN114900211A (en) * 2016-11-02 2022-08-12 松下电器（美国）知识产权公司 Communication apparatus and communication method
CN110431814A (en) * 2017-03-27 2019-11-08 英特尔Ip公司 Utilize the devices, systems, and methods of head B field transmission EDMG MU PPDU
CN106888179A (en) * 2017-03-30 2017-06-23 上海无疆信息科技有限公司 A kind of channel estimation methods towards WLAN compatibility different frame formats
CN110651456B (en) * 2017-04-19 2022-06-14 Lg 电子株式会社 Method for transmitting and receiving signal in wireless LAN system and apparatus for the same
US11469932B2 (en) 2017-04-19 2022-10-11 Lg Electronics Inc. Method for transmitting and receiving signal in wireless LAN system and apparatus for said method
CN110651456A (en) * 2017-04-19 2020-01-03 Lg 电子株式会社 Method for transmitting and receiving signal in wireless LAN system and apparatus for the same
CN110637448A (en) * 2017-04-20 2019-12-31 Lg 电子株式会社 Method for transmitting and receiving signal in wireless LAN system and apparatus for the same
CN110637448B (en) * 2017-04-20 2022-06-03 Lg 电子株式会社 Method for transmitting and receiving signal in wireless LAN system and apparatus for the same
US11337219B2 (en) 2017-06-19 2022-05-17 Intel Corporation Apparatus, system and method of encoding a wireless transmission
US11750435B2 (en) 2017-07-04 2023-09-05 Huawei Technologies Co., Ltd. Data processing method and apparatus
CN109218243A (en) * 2017-07-04 2019-01-15 华为技术有限公司 A kind of data processing method and device
US11265832B2 (en) 2017-07-04 2022-03-01 Huawei Technologies Co., Ltd. Data processing method and apparatus
CN109756258B (en) * 2017-11-07 2021-03-30 华为技术有限公司 Beam training method and device
CN109756258A (en) * 2017-11-07 2019-05-14 华为技术有限公司 Wave beam training method and device
WO2019214212A1 (en) * 2018-05-07 2019-11-14 华为技术有限公司 Data transmission method, device and storage medium
US11431447B2 (en) 2018-05-07 2022-08-30 Huawei Technologies Co., Ltd. Data transmission method and apparatus, and storage medium
CN116318583A (en) * 2018-07-09 2023-06-23 华为技术有限公司 Signaling field indication method and device
CN116318583B (en) * 2018-07-09 2023-12-08 华为技术有限公司 Signaling field indication method and device
US12003454B2 (en) 2018-07-09 2024-06-04 Huawei Technologies Co., Ltd. Signal field indication method and apparatus
WO2020187208A1 (en) * 2019-03-18 2020-09-24 华为技术有限公司 Information indication method and device, and data transmission system
CN111726193A (en) * 2019-03-18 2020-09-29 华为技术有限公司 Information indication method and device and data transmission system
WO2021031780A1 (en) * 2019-08-22 2021-02-25 中兴通讯股份有限公司 Data frame detection method and apparatus, and storage medium
CN113259043B (en) * 2021-05-18 2022-12-09 力同科技股份有限公司 Data processing method, data processing device, communication system, communication device, and medium
CN113259043A (en) * 2021-05-18 2021-08-13 力同科技股份有限公司 Data processing method and device for frame synchronization, communication system and communication device
CN114510212B (en) * 2021-12-31 2023-08-08 赛因芯微(北京)电子科技有限公司 Data transmission method, device and equipment based on serial digital audio interface
CN114510212A (en) * 2021-12-31 2022-05-17 赛因芯微(北京)电子科技有限公司 Data transmission method, device and equipment based on serial digital audio interface

Also Published As

Publication number Publication date
CN104363192B (en) 2017-10-31

Similar Documents

Publication Publication Date Title
CN104363192B (en) A kind of method of reseptance and device of the MIMO communication system of compatible a variety of frame formats
US20230038272A1 (en) Method and apparatus for transmitting and receiving data in a mimo system
US9622247B2 (en) Preamble and header bit allocation for power savings within multiple user, multiple access, and/or MIMO wireless communications
US9634746B2 (en) Method and apparatus for transceiving data in a MIMO system
US8498245B2 (en) Method of arranging packets in a wireless communication system and related device
US20120230448A1 (en) Method and apparatus for transmitting data in very high throughput wireless local area network system
JP6046775B2 (en) Data block transmission method and transmitter in wireless communication system
KR20180016364A (en) Transmission device and transmission method of intensive physical layer protocol data unit
JP6782467B2 (en) Control signal transmitter and transmission method in wireless communication system
US20150256309A1 (en) Methods and apparatuses for wirelessly communicating in a multiple user-multiple-in-multiple-out network
JP2022009349A (en) Communication device, communication method, and integrated circuit
US20180198654A1 (en) Signaling of Training Field Length and Guard Interval Duration
WO2016088956A1 (en) Method and device for transmitting data unit

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant
CP03 Change of name, title or address
CP03 Change of name, title or address

Address after: 211100 9 Jiangning Road, Jiangning economic and Technological Development Zone, Nanjing, China

Patentee after: NANJING ZEPUTUO INFORMATION TECHNOLOGY Co.,Ltd.

Address before: 211100 No.9, mozhou East Road, Jiangning Economic Development Zone, Nanjing, Jiangsu Province

Patentee before: ZTE Wavetone Science and Technology Ltd.

TR01 Transfer of patent right
TR01 Transfer of patent right

Effective date of registration: 20210706

Address after: 211100 8th floor, building B4, wireless Valley, No.9, mozhou East Road, Jiangning District, Nanjing City, Jiangsu Province

Patentee after: Nanjing etaco Communication Technology Co.,Ltd.

Address before: 211100 9 Jiangning Road, Jiangning economic and Technological Development Zone, Nanjing, China

Patentee before: NANJING ZEPUTUO INFORMATION TECHNOLOGY Co.,Ltd.