使用分集技术的信号调制类型识别  

Modulation Classification Using Spatial Diversity

作　　者：贺涛[1] 周正欧[1] 

机构地区：[1]电子科技大学电子工程学院,成都610041

出　　处：《电子与信息学报》2008年第4期872-875,共4页Journal of Electronics & Information Technology

基　　金：国家自然科学基金(60472014)资助课题

摘　　要：针对衰落环境下的调制识别,该文基于决策理论和多天线接收分集技术提出了一种解决方法。根据对未知信道和信号参数的不同处理方式,推导了用于识别的似然函数,并构造了分类器。采用多天线分集技术提高正确识别率,并考虑了天线空间位置对分集合并的影响,提出了解决办法。计算机仿真结果表明该文所述方法的有效性和正确性。A decision-theoretic based scheme is developed for modulation classification in a fading environment. The proposed method takes into account a fiat Rayleigh fading propagation channel. The likelihood function is derived according to the channel and signals＇ parameters character and classifier is constructed. Spatial diversity technique with multi-antennas array receiver is exploited to improve the correct classification probability. A method dealing with the effect for diversity induced by the displacement of receiving antennas is also proposed. Simulations demonstrate that the proposed scheme is efficient in fading situations.

关 键 词：调制类型识别 衰落 最大似然函数 空间分集 

分 类 号：TN911.7[电子电信—通信与信息系统]