一种与前向纠错结合的判决指向SNR估计方法  

Decision directed SNR estimation algorithm combining with forward error correction

作　　者：许华[1] 郑辉[1] 

机构地区：[1]西南电子电信技术研究所重点实验室,四川成都610041

出　　处：《通信学报》2005年第4期14-18,共5页Journal on Communications

摘　　要：通过最大似然方法导出了MPSK信号在加性高斯白噪声信道的判决指向(DD)信噪比估计算法,并将这种算法与前向纠错算法结合得到了一种新的信噪比估计方法。分析和仿真的结果表明,该方法的估计性能不但比判决指向算法好得多,而且也优于最近出现的其他信噪比估计算法。A decision-directed (DD) signal-noise-ratio(SNR) estimation algorithm for general MPSK signals was derived based on maximum-likelihood (ML) principle, and a scheme combining DD SNR estimation algorithm with forward error correction (FEC) was also developed. The result of analysis and simulation shows that the performance of new scheme is not only much better than that of DD algorithms but also prior to that of the algorithms presented recently.

关 键 词：信息处理技术 信噪比估计 最大似然准则 MPSK信号 前向纠错 

分 类 号：TN929.53[电子电信—通信与信息系统]