Xu Yi-tao, Wang Cheng-gui. A MMSE Channel Estimator Based on Adaptive Order Determination in OFDM Systems[J]. Journal of Electronics & Information Technology, 2007, 29(1): 117-120. doi: 10.3724/SP.J.1146.2005.00439
Citation:
Xu Yi-tao, Wang Cheng-gui. A MMSE Channel Estimator Based on Adaptive Order Determination in OFDM Systems[J]. Journal of Electronics & Information Technology, 2007, 29(1): 117-120. doi: 10.3724/SP.J.1146.2005.00439
Xu Yi-tao, Wang Cheng-gui. A MMSE Channel Estimator Based on Adaptive Order Determination in OFDM Systems[J]. Journal of Electronics & Information Technology, 2007, 29(1): 117-120. doi: 10.3724/SP.J.1146.2005.00439
Citation:
Xu Yi-tao, Wang Cheng-gui. A MMSE Channel Estimator Based on Adaptive Order Determination in OFDM Systems[J]. Journal of Electronics & Information Technology, 2007, 29(1): 117-120. doi: 10.3724/SP.J.1146.2005.00439
MMSE estimator is a common channel estimator in coherent OFDM systems. Against mismatch problem of MMSE estimator, an improved MMSE channel estimator based on adaptive order determination is proposed. This algorithm estimates the maximum multipath delay, and calculates the channel autocorrelation function adaptively. It is shown that the proposed method performance is close to the optimal matched MMSE estimator.
[1] Coleri S, Ergen M, Puri A, and Bahai A. Channel estimation techniques based on pilot arrangement in OFDM systems[J].IEEE Trans. on Broadcasting.2002, 48(3):223- [2] Speth M, Fechtel S A, Fock G, and Meyr H. Optimum receiver design for OFDM-based broadband transmission Part II: A case study[J].IEEE Trans. on Commun.2001, 49(4):571- [3] Hoeher P. A statistical discrete-time model for the WSSUS multipath channel[J].IEEE Trans. on Veh. Technol.1992, 41(11):461- [4] Edfors O, Sandell M, Van de Beek J J, Vilson S K, and Borjesson P O. Analysis of DFT based channel estimations for OFDM. Research Report TULEA, 1996:17, Div. of Signal Processing, Lulea University of Technology, Sept. 1996. [5] Kay S M. Fundamentals of Statistical Signal Processing: Estimation Theory. Englewood Cliffs, NJ: Prentice-Hall, 1993, Ch8.