On the optimization of two-way AF MIMO relay channel with beamforming

Namjeong Lee, Chan Byoung Chae, Osvaldo Simeone, Joonhyuk Kang

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

6 Citations (Scopus)

Abstract

This paper studies the joint design of transmit beamformers, receive combiners, and linear relaying matrix for a two-way amplify-and-forward (AF) relay system equipped with multiple-antennas at sources and relay. A single data stream is transmitted by each source. Due to the non-convexity of the optimization problem, finding a solution that maximizes the sum-rate appears to be intractable. Hence, a solution to the original problem is approximated via the iterative solution of three optimization problems, one for the transmit beamformer, one for the receive combiner, and one for the linear relaying matrix. Since the latter is non-convex, a suboptimal iterative procedure is proposed. Joint optimization is assumed to be performed at the relay, which designs the transceiver (thanks to perfect channel state information) and informs the sources of the transmit beamformers/receive combiners. Finally, an upper bound to the achievable sum-rate is provided. The proposed technique shows achievable sum-rate performance very close to the upper bound. Moreover, the algorithm converges to the final solution in a reasonable number of iteration.

Original languageEnglish
Title of host publicationConference Record of the 44th Asilomar Conference on Signals, Systems and Computers, Asilomar 2010
Pages918-922
Number of pages5
DOIs
Publication statusPublished - 2010 Dec 1
Event44th Asilomar Conference on Signals, Systems and Computers, Asilomar 2010 - Pacific Grove, CA, United States
Duration: 2010 Nov 72010 Nov 10

Publication series

NameConference Record - Asilomar Conference on Signals, Systems and Computers
ISSN (Print)1058-6393

Other

Other44th Asilomar Conference on Signals, Systems and Computers, Asilomar 2010
CountryUnited States
CityPacific Grove, CA
Period10/11/710/11/10

All Science Journal Classification (ASJC) codes

  • Signal Processing
  • Computer Networks and Communications

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    Lee, N., Chae, C. B., Simeone, O., & Kang, J. (2010). On the optimization of two-way AF MIMO relay channel with beamforming. In Conference Record of the 44th Asilomar Conference on Signals, Systems and Computers, Asilomar 2010 (pp. 918-922). [5757701] (Conference Record - Asilomar Conference on Signals, Systems and Computers). https://doi.org/10.1109/ACSSC.2010.5757701