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Volume 29 Issue 2
Jan.  2011
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Liang Yong-ming, Luo Han-wen, Huang Jian-guo. A Method of Channel Estimation Based on Adaptive Filtering in MIMO-OFDM Systems[J]. Journal of Electronics & Information Technology, 2007, 29(2): 310-313. doi: 10.3724/SP.J.1146.2005.00740
Citation: Liang Yong-ming, Luo Han-wen, Huang Jian-guo. A Method of Channel Estimation Based on Adaptive Filtering in MIMO-OFDM Systems[J]. Journal of Electronics & Information Technology, 2007, 29(2): 310-313. doi: 10.3724/SP.J.1146.2005.00740

A Method of Channel Estimation Based on Adaptive Filtering in MIMO-OFDM Systems

doi: 10.3724/SP.J.1146.2005.00740
  • Received Date: 2005-06-24
  • Rev Recd Date: 2005-12-05
  • Publish Date: 2007-02-19
  • 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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  • [1] Foschini G J and Gans M J. on limits of wireless communications in a fading environment when using multiple antennas [J]. Wireless Pers. Communication, 1998, 6: 331-335. [2] Stuber G L, Barry J R, and McLaughlin S W, et al.. Broadband MIMO-OFDM wireless communications [J]. IEEE Proc. on Digital Object Identifier, 2004, 92(2): 271-294. [3] Yatawatta S and Petropulu A P. Blind channel estimation in MIMO OFDM systems [C]. 2003 IEEE Workshop on Statistical Signal Processing, Santorini, Greece, 28 Sept-1 Oct.., 2003: 363-366. [4] Ye Li, Seshadri N, and Ariyavisitakul S. Channel estimation for OFDM systems with transmitter diversity in mobile wireless channels [J].IEEE J. on Selected Areas in Communications.1999, 17(3):461-471 [5] Ye Li. Simplified channel estimation for OFDM systems with multiple transmit antennas [J].IEEE Trans. on Wireless Communications.2002, 1(1):67-75 [6] Schafhuber D, Rupp M, and Matz G, et al.. Adaptive identification and tracking of doubly selective fading channels for wireless MIMO-OFDM systems [C]. 4th IEEE Workshop on Signal Processing Advances in Wireless Communications, Rome, Italy, 15-18 June, 2003: 417- 421. [7] Haykin S. Adaptive Filter Theory [M]. Upper Saddle River, NJ, USA: Prentice-Hall, 1986, chapter 5-chapter 9. [8] Barhumi I and Leus G. Optimal training sequences for channel estimation in MIMO OFDM systems in mobile wireless channels [C]. 2002 International Zurich Seminar on Broadband Communications, Access, Transmission, Networking. Zurich, 19-21 Feb., 2002: 44: 1-6.
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