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A Real-time 802.11 Compatible Distributed MIMO System

Published: 17 August 2015 Publication History

Abstract

We present a demonstration of a real-time distributed MIMO system, DMIMO. DMIMO synchronizes transmissions from 4 distributed MIMO transmitters in time, frequency and phase, and performs distributed multi-user beamforming to independent clients. DMIMO is built on top of a Zynq hardware platform integrated with an FMCOMMS2 RF front end. The platform implements a custom 802.11n compatible MIMO PHY layer which is augmented with a lightweight distributed synchronization engine. The demonstration shows the received constellation points, channels, and effective data throughput at each client. It also shows how these vary as a function of interference, the timeliness of channel feedback, and the transmission rates used by the different transmitters.

References

[1]
Analog devices FMCOMMS2. http://www.analog.com/en/design-center/evaluation-hardware-and-software/evaluation-boards-kits/EVAL-AD-FMCOMMS2.html.
[2]
H. Rahul, S. Kumar, and D. Katabi. MegaMIMO: Scaling Wireless Capacity with User Demands. In ACM SIGCOMM 2012, Helsinki, Finland, August 2012.
[3]
Xilinx Zynq. http://www.xilinx.com/products/silicon-devices/soc/zynq-7000.html. Zynq All Programmable SOC.

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Published In

cover image ACM SIGCOMM Computer Communication Review
ACM SIGCOMM Computer Communication Review  Volume 45, Issue 4
SIGCOMM'15
October 2015
659 pages
ISSN:0146-4833
DOI:10.1145/2829988
Issue’s Table of Contents
  • cover image ACM Conferences
    SIGCOMM '15: Proceedings of the 2015 ACM Conference on Special Interest Group on Data Communication
    August 2015
    684 pages
    ISBN:9781450335423
    DOI:10.1145/2785956
Permission to make digital or hard copies of part or all of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. Copyrights for third-party components of this work must be honored. For all other uses, contact the Owner/Author.

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Association for Computing Machinery

New York, NY, United States

Publication History

Published: 17 August 2015
Published in SIGCOMM-CCR Volume 45, Issue 4

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Author Tags

  1. 802.11
  2. MIMO
  3. distributed MIMO
  4. multi-user MIMO
  5. network protocols
  6. signal processing
  7. wireless access points
  8. wireless networks

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