宽带信号的角度谱恢复方法研究

Research on the Method of Spatial Azimuth Spectrum Retrieval of Wide-Band Signals

本文利用栅瓣随频率漂移的特性和峰值分布的统计特性,构造了一种栅瓣滤波器.利用该栅瓣滤波器对宽频带波束输出滤波可以滤除栅瓣的影响.等间隔线阵的实验数据处理结果表明,在阵元间距是波长0.8～1.3倍相应的频段范围内,得到了较好的滤波效果.

A type of grating lobe filter is designed based on the azimuth shift character of grating lobe as the change of frequency and statistical character of peak in time-frequency domain. Filtering to traditional wide- band beam output can suppress the effects of grating lobe on arrays validly using this filter. The better experimental results are obtained in the bandwidth corresponding to d/λ = 0. 8 - 1.3 on a equally sparse line array.