Max-Min Antenna Selection for Bi-Directional Multi-Antenna Relaying

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Executive Summary

In this paper, the authors study the performance of bidirectional (two-way) communication system using two different broadcast schemes with network coding. They propose the use of Max-Min criteria for antenna selection with binary network coding and transmit beamformig without binary network coding. They derive and show that unlike traditional antenna selection with binary network coding scheme, the Max-Min Antenna Selection scheme can achieve full diversity order. Compared with transmit beamforming, Max-Min Antenna Selection achieves comparable performance but with less stringent requirements on the channel state information. Also its extension to distributed network of multiple-antenna relays is much easier than transmit beamforming relaying scheme.

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