多径信号相关与信道相关阵列空间谱估计性能  

Spatial spectrum estimation performance of multipath signal correlation and channel correlation array

作　　者：李忠[1] LI Zhong(The 22nd Research Institute of CETC,Xinxiang 453003,China)

机构地区：[1]中国电子科技集团公司第二十二研究所,河南新乡453003

出　　处：《电子设计工程》2022年第5期56-60,共5页Electronic Design Engineering

摘　　要：移动通信信号传输过程中不仅存在多径相关或相干信号,多信道接收还存在信道相关性。仿真分析表明,相关信号的谱估计几乎无法分辨;针对信道相关性,引入了信道相关系数矩阵,分析信道相关性对阵列空间谱估计的影响,分析可知,信道相关性增加,阵列的空间谱分辨率显著恶化;文中在同时存在信号相关与信道相关的双重因素下,分析阵列空间谱的估计性能。计算研究分析表明,存在双重因素下空间谱的估计性能显著降低,可能导致阵列侦测系统估计性能明显失效。In the process of mobile communication signal transmission,there are not only multipath correlation or coherent signals,but also channel correlation in multi-channel reception. Simulation results show that the spectrum estimation of correlated signals is almost indistinguishable;For channel correlation,the channel correlation coefficient matrix is introduced to analyze the influence of channel correlation on array spatial spectrum. The results show that the spatial spectral resolution of the array is deteriorated significantly with the increase of channel correlation;The performance of spatial spectrum estimation is analyzed in the presence of both signal correlation and channel correlation.The calculation and analysis show that the performance of spatial spectrum estimation is significantly reduced under the dual factors,which may lead to the estimation performance failure of array detection system.

关 键 词：移动通信 相关信道 多径相关信号 DOA 

分 类 号：TN911.7[电子电信—通信与信息系统]