一种简化的OFDM信道估计方法

OFDM（JE交频分复用）技术是无线通信领域的重要技术，研究信道估计精度对系统性能有着直接的影响。提出了基于导频插入的LS（最小二乘法估计）、MMSE（最小均方误差估计）和SVD（奇异值分解）信道估计方法。并针对MMSE算法有很好的性能但复杂度大，LS算法复杂度低但性能受到限制，提出了一种改进方法。采用广义平稳非相关散射下的多径时变瑞利信道模型，对各个算法进行了仿真试验，得出不同算法的信道估计中误比特曲线，比较了各个算法的性能。仿真结果表明：改进的算法有好的性能和低的复杂度。

An Improved OFDM Channel Estimate Method

OFDM has become very important technology in wireless communication systems.And the accuracy of channel estimation will influence the performance of OFDM systems directly.This paper presents the Least Square and Minimum Mean-Square error and Singular Value Decomposition channel estimation based on block-type pilot assignment.In view of the contradiction of traditional estimators between performance and computational complexity,a simplified estimator for LS and MMSE are proposed.The broad sense uncorrelated ...