Analog source exchange with the help of a relay

Tùng T. Kim, H. Vincent Poor

Research output: Chapter in Book/Report/Conference proceedingConference contribution


The problem of bidirectionally transmitting two analog sources over a fading channel with the help of a relay is studied. In the regime of high signal-to-noise ratios, upper and lower bounds on the exponent of the end-to-end expected distortion are derived. It is shown that simple two-way relaying protocols based on the separation of source and channel coding can provide significant improvements in the distortion exponent over their one-way counterparts. In particular, in the regime of low channel bandwidth to source bandwidth ratios, an amplifyand-forward scheme is shown to achieve good distortion performance, albeit at the cost of large feedback overhead. In the regime of high bandwidth ratio, even better performance is achieved by a novel adaptive decode-and-forward scheme that successfully exploits low-rate feedback from the relay to the source nodes.

Original languageEnglish (US)
Title of host publicationGLOBECOM 2009 - 2009 IEEE Global Telecommunications Conference
StatePublished - 2009
Event2009 IEEE Global Telecommunications Conference, GLOBECOM 2009 - Honolulu, HI, United States
Duration: Nov 30 2009Dec 4 2009

Publication series

NameGLOBECOM - IEEE Global Telecommunications Conference


Other2009 IEEE Global Telecommunications Conference, GLOBECOM 2009
Country/TerritoryUnited States
CityHonolulu, HI

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering


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