衰落信道下的信源数目估计方法  

Source Number Estimation Algorithm in Fading Channels

作　　者：王艳温[1] 郭楠 WANG Yanwen;GUO Nan(The 54th Research Institute of CETC,Shijiazhuang 050081,China;Army Aviation Development Office,Beijing 100012,China)

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 [2]陆军航空装备发展办公室,北京100012

出　　处：《无线电通信技术》2018年第5期502-505,共4页Radio Communications Technology

基　　金：国家部委基金资助项目

摘　　要：针对空间谱估计测向、盲源分离等阵列信号处理中现有信源数目估计方法在衰落信道条件下估计性能严重下降的问题,提出了分别适用于瑞利平坦衰落信道和频率选择性衰落信道的信源数目估计新方法。对其实现原理进行了简要介绍,对估计性能随信噪比、采样点数、信源数等的变化规律进行了仿真验证,并与现有信源数目估计方法进行了对比分析,充分验证了所提方法的有效性。The fading channels result in the performance of existing source number estimation method used in spatial spectrum DOA estimation and blind source separation declining badly.Two new methods applied in Rayleigh flat fading channel and frequencyselective fading channel are presented to solve the problem above.The realization principle is introduced briefly.The simulation analysis of all the methods above changing with Signal-to-Noise,sampling numbers and source numbers is carried out. The contrastive analysis of these new methods with existing methods is given,and the performance is validated adequately.

关 键 词：信源数目估计 瑞利平坦衰落信道 频率选择性衰落信道 

分 类 号：TN911[电子电信—通信与信息系统]