相干信号空间谱估计测向仿真研究

Simulation research of coherent signals spatial spectrum estimation to direction finding

空间谱测向技术是一项先进的阵列信号处理技术。普通空间谱MUSIC算法对相干信号波达角估计测向分辨率比较差,推导了基于空间平滑算法和基于频率平滑的算法并进行了仿真。通过仿真对这2种算法与不经平滑计算出的波达角进行了比较分析,结果空间平滑算法对窄带内相干信号分辨率比较理想,而频率平滑算法对宽频带内相干信号的分辨率比较理想。

Spatial spectrum estimation technology to estimation direction is an advanced technology. With general MUSIC algorithm about spatial spectrum estimation, direction resolution is very poor. Algorithm of spatial smoothing and frequency smoothing is deduced and simulated. Comparison and analysis is fulfilled between algorithm of general MUSIC and algorithm of smoothing MUSIC. Finally direction resolution of algorithm of spatial smoothing is satisfactory to signals of narrow band and direction resolution of algorithm of frequency smoothing is satisfactory to signals of wideband.