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| An Algorithm to Reduce MSE of LS Channel Estimation in Mobile OFDM System |
| Li GuoSong;Zhou ZhengOu |
| College of Electronic Engineering, UESTC, Chengdu 610054, China |
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Abstract In mobile OFDM system, this paper pays much attention to the character of time domain result of LS channel estimation. At the same time, it is noticed that the character of Channel Impulse Response （CIR） is finite impulse response. A new algorithm is proposed to estimate channel effective order, and then the estimated value is used to truncate the time-domain result of channel estimation achieved by LS algorithm in order to reduce Mean Square Error （MSE） of LS algorithm due to noise and Inter-Carrier Interference （ICI）. Performance improvement of LS algorithm and its enhancement on Symbol Error Rate （SER） have been evaluated by computer simulation.
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Received: 12 April 2004
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2005, Vol. 27 
