An Error Exponent for the AWGN Channel with Decision Feedback and Lattice Coding

  • Kenneth Palacio-Baus
  • , Natasha Devroye

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

We present achievable error exponents for the AWGN channel with one bit noiseless feedback and an almost-sure power constraint. As in Forney's decision feedback approach for discrete memoryless channels, the backward channel is used to request retransmissions from the transmitter whenever an erasure is declared at the decoder. Our erasure/re-transmission-request scheme introduces a novel erasure decoding rule built on top of a lattice-based code inspired by De Buda. Numerically, our scheme is seen to outperform the sphere packing bound (valid for block codes) at lower rates and higher SNRs.

Original languageEnglish
Title of host publication2022 58th Annual Allerton Conference on Communication, Control, and Computing, Allerton 2022
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9798350399981
DOIs
StatePublished - 2022
Event58th Annual Allerton Conference on Communication, Control, and Computing, Allerton 2022 - Monticello, United States
Duration: 27 Sep 202230 Sep 2022

Publication series

Name2022 58th Annual Allerton Conference on Communication, Control, and Computing, Allerton 2022

Conference

Conference58th Annual Allerton Conference on Communication, Control, and Computing, Allerton 2022
Country/TerritoryUnited States
CityMonticello
Period27/09/2230/09/22

Keywords

  • AWGN
  • Error exponents
  • Forney
  • lattice
  • variable length coding

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