Full-Duplex Relay Based on Zero-Forcing Beamforming

Jong-Ho LEE  Oh-Soon SHIN  

IEICE TRANSACTIONS on Communications   Vol.E94-B    No.4    pp.978-985
Publication Date: 2011/04/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E94.B.978
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Wireless Communication Technologies
decode-and-forward,  full-duplex relay (FDR),  zero-forcing beamforming (ZFBF),  

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In this paper, we propose a full-duplex relay (FDR) based on a zero-forcing beamforming (ZFBF) for a multiuser MIMO system. The ZFBF is employed at the base station to suppress both the self-interference of the relay and the multiuser interference at the same time. Numerical results show that the proposed FDR can enhance the sum rate performance as compared to the half-duplex relay (HDR), if sufficient isolation between the transmit and receive antennas is ensured at the relay.