利用信号循环平稳特性提高空间谱估计测向性能  

An Improvement on the Performance of Direction Finding Based on Spatial Spectrum Estimation Using the Signal Cyclo-stationary Property

作　　者：王玉军[1] 苟彦新[1] 史雪瑞[1] 

机构地区：[1]空军工程大学电讯工程学院

出　　处：《通信对抗》2004年第2期9-13,共5页Communication Countermeasures

摘　　要：分析了信号的循环平稳特性，介绍了几种将谱相关理论用于谱估计测向的算法。研究表明，充分利用信号的循环平稳特性可以克服传统谱估计测向算法的不足，提高对信号的选择性、分辨率、过载能力、检测能力以及抑制宽带干扰和加性噪声的能力，同时还可以完成对宽带信号的一维和二维波达方向估计。An analysis of cyclo-stationary properties of the signals is made, and then several new algorithms of direction finding (DF) based on spatial spectrum estimation are presented in the paper. The results from theoretical study show that with the signal cyclo-stationary property, the drawback to conventional DF algorithm based on spatial spectrum estimation can be overcome, the selectivity of the signal improved, the signal resolution increased, and the capabilities of the signal overloading and detecting and the suppression of wideband jamming signal and additive noise enhanced. At the same time, direction of arrival (DOA) estimation of wideband signal sources with one dimension and two dimensions can also be achieved.

关 键 词：循环平稳 谱相关 周期最小二乘 MUSIC 波达方向估计 空间谱估计 

分 类 号：TN911.6[电子电信—通信与信息系统]