期刊论文

Wang, Y.

中文

通信学报

1000-436X

2011

32

6

165-171

10.3969/j.issn.1000-436X.2011.06.022

国家高技术研究发展计划（“863”计划）基金资助项目（2007AA11A121） 国家自然科学基金资助项目（60775047） 湖南省科技厅计划项目（2008FJ3114,2009FJ3014）

本校为其他机构

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。

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 considering 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 estimati...