Spatial-Temporal Adaptive MIMO Beamforming for Frequency-Selective Fading Channels

Huy Hoang PHAM
Tetsuki TANIGUCHI
Yoshio KARASAWA

Publication
IEICE TRANSACTIONS on Communications   Vol.E90-B    No.3    pp.578-585
Publication Date: 2007/03/01
Online ISSN: 1745-1345
DOI: 10.1093/ietcom/e90-b.3.578
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Wireless Communication Technologies
Keyword: 
smart antenna,  frequency-selective fading,  multipath,  MIMO,  mutiuser system,  

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Summary: 
Nowadays, MIMO systems are playing an important role in wireless communications. In this paper, we propose a spatial-temporal adaptive MIMO beamforming scheme for single carrier transmission in frequency-selective fading channels with the assumption of perfect channel state information (CSI) at both the transmitter and receiver. The transmit and receive weight vectors for detecting the preceding signal and the receive weight vectors for detecting the delayed signals of the preceding signal are designed by an iterative update algorithm. Based on minimum mean square error (MMSE) method, the delayed versions of the preceding signal are exploited to maximize the output signal to interference and noise ratio (SINR) instead of suppressing them at the receiver. The improvement of output SINR is useful for MIMO systems to enhance the high-quality communication in broadband wireless systems.