杂波下频率步进信号参数设计及处理算法研究

针对杂波环境下目标检测与成像问题,给出了频率步进信号参数设计的约束条件与优化准则,分析了帧间脉冲多普勒处理的测速性能,深入研究了在频域上进行杂波抑制、回波补偿及合成高分辨的处理方法. 基于实际的雷达系统参数进行了计算机仿真,结果表明该算法可有效提取杂波环境下的微弱运动目标信息,并合成了正确的一维高距离分辨像,且抗噪声性能好,运算量小,工程易实现. 

Parameter Design of Stepped Frequency Waveform and Its Signal Processing Algorithm in Clutter

For detection and imaging of moving targets in clutter, the constraint conditions and the optimization criterion of designing the stepped frequency waveform parameters are analyzed and the signal processing algorithm is proposed in this research. The signal processing method is based on the pulse Doppler (PD) processing to measure the radial velocity among pulses at the same frequency from different bursts. The subsequent processing includes clutter rejection, echo compensation and synthesizing high range resolution profiles. Simulation has been implemented based on the parameters of a real radar system. The results manifest that the proposed algorithm could extract small target information in clutter and obtain the perfect one-dimension high range resolution profile (HRRP) with the advantages of good anti-noise performance, small calculating amount and simple engineering realization.