摘要
为获得更为精确的有效信道长度,在分析最大似然(ML)信道估计算法对有效信道长度具有依赖性的基础上,提出将粗搜索策略与逐次插值逼近法相结合的有效信道长度跟踪方案,跟踪信道长度的变化。理论分析和仿真结果表明,在时变信道环境下,该算法可以有效跟踪信道长度的变化,提高ML信道估计器的估计性能。
To Obtain a more accuracy effective length Of channel impulse response, based on the analysis that the performance of maximum likelihood （ML） estimator depends on the exactness of effective length of channel impulse response, this paper proposed a novel ML channel estimator which combined the MLE with coarse search and successived approximation. Its performance has been demonstrated using theoretical analysis and simulations under the time-variant channel conditions.
出处
《计算机应用研究》
CSCD
北大核心
2009年第6期2211-2213,共3页
Application Research of Computers
基金
国家自然科学基金资助项目(60702020)
关键词
正交频分复用
信道估计
有效信道长度
归一化均方误差
orthogonal frequency division multiplexing（OFDM）
channel estimation
effective length of channel impulse response
normalized mean squared error
