全数字接收机中一种残余频偏矫正算法

The Correction Algorithm for Residual Frequency in All-digital Receiver

为解决全数字接收机载波频偏估计过程的载波频偏估计不完全引起的系统性能下降的问题,该文在分析和研究残余频偏与残余相偏之间关系的基础上,提出了一种基于LMS短时反馈的载波残余频偏矫正算法,即利用反馈时间段内计算出来的残余相偏来直接矫正后续接收数据的相位。仿真结果表明,采用该算法对残余相偏进行估计矫正后,系统性能有一定的提高。

This paper is concerned with the carrier residual frequency offset,which may drag down the system performance owing to its incomplete estimation during the carrier frequency offset estimation in the all-digital receiver.On the basis of the analysis and study of the relationship between residual frequency offset and residual phase offset,the paper proposes an algorithm of mean square error feedback in few time for carrier residual frequency offset correction.By use of residual phase calculated during the fee...