Computer Science ›› 2014, Vol. 41 ›› Issue (4): 53-56.

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Improved LMMSE Channel Estimation Algorithm

LIAN Zhu-xian,YU Jiang and XU Li-min   

  • Online:2018-11-14 Published:2018-11-14

Abstract: LS algorithm is simple and vulnerable to the interference of noise,but it does not need to know the channel statistic knowledge in advance.Through the research of time-domain characteristics of channel,an improved LMMSE channel estimation algorithm was proposed.Compared with traditional LMMSE channel estimation algorithm,the improved LMMSE algorithm does not need to know channel statistical information in advance,whose performance is superior to the LS algorithm.And aiming at MSE and BER performance,its performance was simulated.Theoretical analysis and simulation results also show that performance of the improved LMMSE algorithm is better than that of the LS algorithm,and close to the traditional LMMSE algorithm.

Key words: Orthogonal frequency division multiplexing,Pilot aided channel estimation,Signal-to-noise ratio,Mean square error

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