Ingress cancellation: Difference between revisions

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Ingress cancellation is a method for removing narrowband noise from an electromagnetic signal using a digital filter.^[1] This type of filter is used on hybrid fiber-coaxial broadband networks.^[2]^[3]

If a carrier appears in the middle of the upstream data signal, ingress cancellation can remove the interfering carrier without causing packet loss.^{[citation needed]}

Ingress cancellation also removes one or more carriers that are higher in amplitude than the data signal. Ingress cancellation eventually will break if the in-channel ingress gets too high.^{[citation needed]}

References

^ Broadband Last Mile; Access Technologies for Multimedia Communications. CRC Press. 2018. pp. 290–299. ISBN 9781351836685.
^ Lusky, I.; Geri, N.; Reznic, Z.; Bitran, Y. (2002). "Adaptive algorithms for choosing transmission parameters in dynamic channel conditions" (PDF). 2002 14th International Conference on Digital Signal Processing Proceedings. 1. IEEE: 53–56.
^ Popper, A.; Buda, F.; Sari, H. (2002). "Ingress noise cancellation for the upstream channel in broadband cable access systems". 2002 IEEE International Conference on Communications. Conference Proceedings. ICC 2002 (Cat. No.02CH37333). Vol. 3. IEEE. pp. 1808–1812. doi:10.1109/ICC.2002.997160. ISBN 0-7803-7400-2. S2CID 22576844.

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+{{Short description|Method for removing narrowband noise}}
-{{Orphan|October 2006}}
+'''Ingress cancellation''' is a method for removing [[narrowband]] [[Noise (signal processing)|noise]] from an [[electromagnetic signal]] using a [[digital filter]].<ref>{{cite book |url=https://books.google.com/books?id=G6LsDwAAQBAJ |title=Broadband Last Mile; Access Technologies for Multimedia Communications |year=2018 |pages=290–299 |isbn=9781351836685 |publisher=[[CRC Press]]}}</ref> This type of filter is used on [[hybrid fiber-coaxial]] [[broadband]] networks.<ref>{{cite journal |url=https://www.ti.com.cn/cn/lit/wp/spay010/spay010.pdf |last1=Lusky |first1=I. |last2=Geri |first2=N. |last3=Reznic |first3=Z. |last4=Bitran |first4=Y. |year=2002 |title=Adaptive algorithms for choosing transmission parameters in dynamic channel conditions |journal=2002 14th International Conference on Digital Signal Processing Proceedings |volume=1 |pages=53–56 |publisher=[[IEEE]]}}</ref><ref>{{cite book |first1=A. |last1=Popper |first2=F. |last2=Buda |first3=H. |last3=Sari |title=2002 IEEE International Conference on Communications. Conference Proceedings. ICC 2002 (Cat. No.02CH37333) |chapter=Ingress noise cancellation for the upstream channel in broadband cable access systems |year=2002 |pages=1808–1812 |volume=3 |doi=10.1109/ICC.2002.997160 |publisher=[[IEEE]]|isbn=0-7803-7400-2 |s2cid=22576844 }}</ref>
-{{Cleanup|January 2006}}
-'''Ingress cancellation''' is a nifty advanced PHY technology that digitally removes in-channel ingress. It won't do anything about out-of-channel ingress, but if a carrier pops up in the middle of the upstream data signal, ingress cancellation can remove the interfering carrier without causing packet loss. In fact, ingress cancellation works its magic such that it can remove one or more carriers that are higher in amplitude than the data signal! Ingress cancellation eventually will break if the in-channel ingress gets too high.
+If a [[Carrier wave|carrier]] appears in the middle of the upstream [[data signal]], ingress cancellation can remove the interfering carrier without causing [[packet loss]].{{Citation needed|date=April 2023}}
+Ingress cancellation also removes one or more carriers that are higher in [[amplitude]] than the data signal. Ingress cancellation eventually will break if the in-channel ingress gets too high.{{Citation needed|date=April 2023}}
+== References ==
+{{reflist}}
+==See also==
+* [[Distortion]]
+* [[Electromagnetic interference]]
+* [[Ingress filtering]]
+* [[Noise reduction]]
+{{Tech-stub}}
+[[Category:Digital electronics]]