一种精确的QPSK信号信噪比估计算法  

A precise SNR estimation algorithm for QPSK signals

作　　者：许华[1] 樊龙飞[1] 郑辉[1] 

机构地区：[1]西南电子电信技术研究所现代信号处理国家重点实验室,四川成都610041

出　　处：《通信学报》2004年第2期55-60,共6页Journal on Communications

基　　金：国家自然科学基金资助项目

摘　　要：通过使用二阶统计量、数据拟合和对QPSK信号实部和虚部分开考虑的方法得到了一种比较精确的QPSK信号的信噪比估计算法。与现有的另外两种算法相比,不但解决了对低信噪比值无法估计的状况,使估计性能有了明显的提高,而且运算复杂度也可根据需要降低到可以接受的程度。This paper has deduced a precise SNR estimation algorithm for QPSK signals by using the methods of two-order statistics, data fitting, and considering the real and imaginary components of QPSK signal respectively. Comparing with the other two existing algorithms, this algorithm solves the problem of noneffective to low SNR values and raises the estimation performance obviously; furthermore the computational complexity can be reduced to the range that we can support according to the need of practice application.

关 键 词：信息处理技术 信噪比估计 数据拟合 运算复杂度 

分 类 号：TN929.53[电子电信—通信与信息系统]