摘要： 提出一种抗干扰信道估计(AICE)算法用于解决MIMO-OFDM系统信道估计问题。该算法在接收端通过对收到的累加信号进行分解，得到来自不同发射天线的信号，通过消除符号间干扰与子载波间干扰及采用期望值最大迭代算法进行信道估计来减小估计误差，提高信道估计的准确性。与ICE算法的性能比较证明了AICE算法在瑞利衰落信道下具有更好的信道估计均方误差及误比特率性能。

关键词: 信道估计, 正交频分复用, 多输入多输出, 符号间干扰, 子载波间干扰

Abstract: This paper proposes an Anti-Interference Channel Estimation(AICE) algorithm to solve channel estimation problem in MIMO-OFDM system. It decomposes the accumulated signal at receive end to obtain the signal of each transmitted antenna, and estimates channel by expectation maximization algorithm to reduce estimation error and improve accuracy by cancel Inter-Symbol Interference(ISI) and Inter-Carrier Interference(ICI). Compared with Iterative Channel Estimation(ICE) algorithm, AICE algorithm is proved that it can obtain better channel estimation performance in terms of mean square error and bit error rate in Rayleigh-fading channel.

Key words: channel estimation, Orthogonal Frequency Division Multiplexing(OFDM), Multi-Input Multi-Output(MIMO), Inter-Symbol Interference(ISI), Inter-Carrier Interference(ICI)

中图分类号: 

• TN916.9