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Scattered Pilot-Aided Channel Estimation and Tracking for MIMO-OFDM Systems
Liang WANG Xiuming SHAN Yong REN Zhengxin MA
IEICE TRANSACTIONS on Communications
Publication Date: 2003/01/01
Print ISSN: 0916-8516
Type of Manuscript: Special Section LETTER (Special Issue on Multiple Access and Signal Transmission Techniques for Future Mobile Communications)
channel estimation, MIMO, OFDM,
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In this article, we present a scattered pilot aided channel estimation and tracking technique for MIMO-OFDM systems. First we extend Li's estimation algorithm to scattered pilot-aided case. Then a scattered pilot-aided tracking scheme is developed to track the time-varying MIMO channel. The algorithms we present reduce the system overhead and channel estimation complexity to a low level with acceptable performance degradation. Simulations of a MIMO-OFDM system with four-transmit and four-receive antennas show that the new algorithm has better performance than Li's algorithm in time-varying MIMO channels.