Distortion exponents for multi-relay cooperative networks with limited feedback

Jing Wang, Jie Liang, Sami Muhaidat

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

Abstract

In this paper, we study the transmission of a Gaussian signal in a multi-relay cooperative system, where each relay is half-duplex and employs the amplify-and-forward (AF) relaying protocol. We focus on the analysis of the distortion exponent that characterizes the high signal-to-noise ratio (SNR) behavior of the end-to-end distortion of the received signal. Specifically, we investigate the feedback scheme where the limited channel state feedback is combined with separate source and channel coding to help the transmission. The feedback scheme is followed by three AF-based multi-relay cooperation protocols, respectively, namely the orthogonal AF protocol, the nonorthogonal AF protocol, and the slotted AF protocol. We derive the optimal distortion exponents of all three cases, and illustrate the effect of the feedback resolution, bandwidth ratio, and number of relays on the optimal distortion exponent. It is shown that the feedback scheme outperforms the best known non-feedback strategies for multi-relay cooperative systems with only a few bits of feedback information.

Original languageBritish English
Title of host publication2010 IEEE Wireless Communications and Networking Conference, WCNC 2010 - Proceedings
DOIs
StatePublished - 2010
EventIEEE Wireless Communications and Networking Conference 2010, WCNC 2010 - Sydney, NSW, Australia
Duration: 18 Apr 201021 Apr 2010

Publication series

NameIEEE Wireless Communications and Networking Conference, WCNC
ISSN (Print)1525-3511

Conference

ConferenceIEEE Wireless Communications and Networking Conference 2010, WCNC 2010
Country/TerritoryAustralia
CitySydney, NSW
Period18/04/1021/04/10

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