Distributed Beamforming Schemes Based on QR Decomposition and SIC Detection for MIMO Relay Networks

Journal of Shanghai Jiaotong University››2012,Vol. 46››Issue (11): 1826-1832.

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Distributed Beamforming Schemes Based on QR Decomposition and SIC Detection for MIMO Relay Networks

HUANG Zi-Li, JIANG Ling-Ge, HE Chen

(School of Electronic， Information and Electrical Engineering, Shanghai Jiaotong University, Shanghai 200240, China)

Received:2011-11-12Online:2012-11-30Published:2012-11-30

Abstract

Abstract:This paper is concerned with a two hop half-duplex wireless communication network with multiple antennas and multiple relays. Based on amplifyandforward (AF) protocol, two new distributed beamforming schemes named IRZF-MF and RZF were proposed for this system. The RZF scheme uses RZF technique for both receive and transmit beamforming while the IRZF-MF scheme uses IRZF and MF technique for receive and transmit beamforming respectively. The simulation results show that the proposed two relay schemes achieve the same performance of existing MF-RZF scheme in the Rayleigh channel, meanwhile, the proposed RZF scheme achieves the best performance which requires a higher computational complexity and the proposed IRZFMF scheme achieves the second best performance while requires less computational complexity than RZF scheme in the Rician channel compared with other existing distributed relaying schemes. Key words：

Key words:multiple-input multiple-output (MIMO),AF relay,distributed beamforming,regularized zero-forcing precoding,QR decomposition

HUANG Zi-Li, JIANG Ling-Ge, HE Chen. Distributed Beamforming Schemes Based on QR Decomposition and SIC Detection for MIMO Relay Networks[J]. Journal of Shanghai Jiaotong University, 2012, 46(11): 1826-1832.

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