Complexity-Reduced Channel Estimation in Spatially Correlated MIMO-OFDM Systems

Ji-Woong CHOI  Yong-Hwan LEE  

Publication
IEICE TRANSACTIONS on Communications   Vol.E90-B   No.9   pp.2609-2612
Publication Date: 2007/09/01
Online ISSN: 1745-1345
DOI: 10.1093/ietcom/e90-b.9.2609
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technologies
Keyword: 
channel estimation,  MIMO-OFDM,  spatially correlated channel,  

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Summary: 
The performance of a MIMO-OFDM system significantly depends upon the accuracy of the channel impulse response (CIR) estimates. In the presence of correlation between the CIRs of the transmit or receive antennas, it is desirable to exploit this correlation to improve the performance of CIR estimation. In this letter, we propose a low-complexity channel estimation filter composed of four concatenated one-dimensional Wiener filters which are optimized to the channel characteristics in the time and frequency domains, and the transmit and receiver antenna front ends, respectively. Finally, the performance of the proposed scheme is verified.