Precoder Design and Capacity Analysis for Multi-Antenna Full-Duplex Relay

Young-Woo KWAK  Jong-Ho LEE  Yong-Hwa KIM  Seong-Cheol KIM  

Publication
IEICE TRANSACTIONS on Communications   Vol.E95-B   No.7   pp.2446-2450
Publication Date: 2012/07/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E95.B.2446
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Fundamental Theories for Communications
Keyword: 
cooperative communication,  full-duplex relay (FDR),  half-duplex relay (HDR),  block-diagonalization (BD),  multi-hop,  

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Summary: 
In this letter, a precoding design for a multiple-input multiple-output (MIMO) full-duplex relay (FDR) system is proposed. For this system, mitigating the self-interference imposed by the transmit antennas on the receive antennas in the same relay station is crucial for improving the performance of the FDR system. The precoding scheme designed in this study uses block-diagonalization (BD). Using this precoding scheme, FDR capacity analysis is performed in the MIMO downlink relay system. Numerical results on system performance in terms of capacity are shown and discussed.