M_2M_4信噪比估计法在散射通信中的应用  

Application Research on M_2M_4 SNR Estimation Algorithm in Troposcatter Communication

作　　者：李经安[1] 苏志[1] 

机构地区：[1]中国电子科技集团公司第五十四研究所,河北石家庄050081

出　　处：《无线电工程》2012年第8期48-50,共3页Radio Engineering

摘　　要：信噪比(SNR)估计对散射通信中功率自适应控制、速率自适应切换及统计信道特性具有重要意义,散射通信需要接收信号的精确信噪比作参考。介绍了一种运算简单、便于工程实现的盲估计算法即二阶矩四阶矩(M2M4)信噪比估计法的原理,将此算法通过硬件来实现。根据散射通信特点,对其进行一系列测试,通过对测试结果分析,得出了M2M4信噪比估计算法在散射通信具有适用性。SNR estimation has a great meaning for adaptive power control,adaptive switch rate and channel characteristics statistic in troposcatter communication. A blind algorithm called as second - order and fourth-order moments estimator algorithm （ M2 M4 ） is introduced, which have such characteristics as simple operation and easy engineer implementation. The algorithm is realized by hardware devices ,and a series of tests are performed, and the test results prove the applicability of M2M4 algorithm in troposcatter communication.

关 键 词：信噪比 盲估计法 散射通信 信道特性 

分 类 号：TM929.5[电气工程—电力电子与电力传动]