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| A Method of Channel Estimation Based on Adaptive Filtering in MIMO-OFDM Systems |
| Liang Yong-ming①; Luo Han-wen①; Huang Jian-guo② |
| ①Electronic Engineering Department, Shanghai Jiao Tong University, Shanghai 200030, China; ②College of Marine Engineering, Northwestern Polytechnical University, Xi′ an 710072, China |
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Abstract This paper proposes a method of channel estimation based on adaptive filters in wireless MIMO-OFDM systems. Though this method does not require any prior knowledge of channel statistics, it can track and estimate time-varying channel instantaneously with the help of adaptive filters. Simulation results have proved this method based on adaptive filters has better MSE and BER performances than another method based on the LS (Least Square) algorithm. The method based on LMS (Least Mean Square) filter has low computational complexity. Moreover, the method based on RLS (Recursive Least Square) filter has better performance and faster convergence than the one based on LMS filter.
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Received: 24 June 2005
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2007, Vol. 29 
