非连续谱高频雷达跳频波的信号处理

Signal Processing for Discontinuous Spectrum HF Radar Waveform

在高频雷达的工作频段中,电磁环境极其恶劣,一般很难找到一段连续无扰的工作频段,因此需要根据外部频率监测的结果来选取雷达工作的频率点,以提高雷达的有效带宽;但是由于频谱的不连续,传统的处理方式不再适用。作者提出一种新的处理方法,先对回波进行速度谱处理,补偿相应的相位,然后对距离维进行先匹配后用加权迭代的最小二乘滤波器进行滤波。仿真结果表明,该算法不仅能得到目标的二维分辨,而且能极大地抑制距离旁瓣。

There have many interference sources on the HF band,so it is difficult to f ind a continuous frequency bands for HF radar.Generally,the frequen cy bands used are based on the result o f exterior frequency watching apparatus.We can not use the traditional method because o f the discontinuous frequency bands.In this paper we put forward a new method,in the first,using spectrum analysis i n velocity space,then using correlatio n match and IRLS filter for the range p rocess;the simulation results show that this method could n ot only improve the efficiency of the target differentiation,but also su ppress the maximum range sidelobe level efficiently.