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| A MMSE Channel Estimator Based on Adaptive Order Determination in OFDM Systems |
| Xu Yi-tao; Wang Cheng-gui |
| Institute of Communications Engineering, PLA Univ. of Sci. & Tech., Nanjing 210007, China |
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Abstract 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.
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Received: 18 April 2005
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2007, Vol. 29 
