Ergodic capacity and power allocation in wireless relay channels

Anders Høst-Madsen, Junshan Zhang

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

6 Scopus citations


This paper studies the ergodic capacity and power allocation for a three-node relay channel over Rayleigh fading. Assuming perfect channel side information (CSI) at the transmitters and the receivers, we find the upper bounds and lower bounds on the capacity by solving generalized "water-filling" power allocation problems. Our results reveal that the optimum relay channel signaling can significantly outperform direct transmissions and traditional multi-hop transmissions. We also characterize the power gain of using the optimum signaling in the high SNR regime and find the corresponding power allocation policies.

Original languageEnglish (US)
Title of host publicationGLOBECOM - IEEE Global Telecommunications Conference
Number of pages5
StatePublished - 2004
EventGLOBECOM'04 - IEEE Global Telecommunications Conference - Dallas, TX, United States
Duration: Nov 29 2004Dec 3 2004


OtherGLOBECOM'04 - IEEE Global Telecommunications Conference
Country/TerritoryUnited States
CityDallas, TX

ASJC Scopus subject areas

  • Engineering(all)


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