Robust AF relay transmission with multiple source-destination pairs under channel uncertainty

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

1 Scopus citations

Abstract

The paper considers a wireless network in which simultaneous communications occur within multiple single antenna source-destination node pairs. An Amplify-and-Forward (AF) relay, equipped with multiple antennas, assists the communication. The relay implements linear beamforming (BF) aiming to minimize the total relay power subject to signal-to-interference ratio (SINR) constraints for each source-destination (S-D) pair. A relay transmission scheme is proposed that instead of assuming the availability of full channel state information (CSI), a typical assumption in such scenario, it considers a more practical case in which there is CSI error at the relay. The maximum SINR loss due to the imperfect CSI is computed and used to further tighten the SINR constraints of each S-D pair. A method recently proposed by the authors [3] is then used along with the tighter SINR constraints to obtain the beamforming weights. The proposed approach is computationally simple and simulation results show that it greatly reduces outage probability.

Original languageEnglish (US)
Title of host publicationConference Record of the 44th Asilomar Conference on Signals, Systems and Computers, Asilomar 2010
Pages126-130
Number of pages5
DOIs
StatePublished - 2010
Event44th Asilomar Conference on Signals, Systems and Computers, Asilomar 2010 - Pacific Grove, CA, United States
Duration: Nov 7 2010Nov 10 2010

Publication series

NameConference Record - Asilomar Conference on Signals, Systems and Computers

Other

Other44th Asilomar Conference on Signals, Systems and Computers, Asilomar 2010
Country/TerritoryUnited States
CityPacific Grove, CA
Period11/7/1011/10/10

All Science Journal Classification (ASJC) codes

  • Signal Processing
  • Computer Networks and Communications

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