WANG Yan1, LIU Hong-li1, ZHAN Jie1. Fuzzy adaptive LS channel estimation for GO-MC-CDMA[J]. 2011, 32(6): 165-171.DOI:
GO-MC-CDMA模糊自适应LS信道估计器研究
摘要
通过选取部分LS估计初值进行FFT插值来重构信道频域响应
进而补偿模型失配偏差;同时考虑噪声对LS估计算法的影响
分析所选取的LS估计初值数目与均方误差之间的关系。在此基础上研究自动选取最佳估计初值数目的方法
并用模糊算法予以实现。仿真表明
模糊自适应LS信道估计器减小了噪声影响
性能优于传统LS信道估计器。
Abstract
The channel frequency response was constructed by choosing a certain number of the first estimate value which was handled by FFT interpolation.Therefore
the model mismatch error could be compensated effectively.In addition
the relationship between the mean-squared error(MSE) and the number of chosen first estimate value was analyzed by consid-ering the influence of the noise on LS Estimation method.Thus
the optimal criterion for obtaining the optimum number of first estimate value was explored with a fuzzy algorithm.The simulations demonstrate that the fuzzy adaptive LS channel es-timation performs is much better than the traditional LS Channel Estimation and that it is more robust with noise.