SIMO信道中信噪比估计算法分析与仿真  

Analysis and Simulation of Signal-to-Noise Estimation Algorithms over Single Input Multiple Output Channels

作　　者：漆雪梅[1] 张效义[1] 

机构地区：[1]解放军信息工程大学信息工程学院,郑州450002

出　　处：《计算机工程》2011年第12期85-87,91,共4页Computer Engineering

基　　金：国家自然科学基金资助项目(60872043)

摘　　要：针对单输入多输出(SIMO)信道信噪比估计问题,在建立同一信号模型的基础上,研究期望最大化估计、二阶矩四阶矩估计、四阶联合估计和六阶矩估计等4种算法。从天线数、调制方式及噪声功率等方面进行仿真,将结果与Cramer-Rao下界进行对比。结合仿真结果分析各种算法的实现复杂度。This paper addresses the problem of Signal-to-Noise（SNR） estimation in wireless Single Input Multiple Output（SIMO） channels. It implements four algorithms of SNR estimation, expectation-maximization estimator, second-and fourth-order moments estimator, fourth-order moment estimator and sixth-order estimator, in common simulated channels and analyzes the reasons that may affect performances of the algorithms, such as the number of the antennae, modulation mode, noise power and so on. Simulated performances are compared with a published Cramer-Rao Lower Bound（CRLB）. It also analyzes the complexity of the algorithms.

关 键 词：信噪比估计 信号模型 单输入多输出 线性调制 CRAMER-RAO下界 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]