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本文描述了一种新研制成功的雷达AMTD处理系统。该系统由一固定三脉冲MTI处理器滤除地杂波,用一个自适应MTI滤波器 (AMTI) 滤除运动杂波,同时用一级联的多普勒滤波器组来匹配信号。基于最大熵谱估计方法的AMTI滤波器实现了对运动杂波的最佳白化。系统采用了8片高速DSP片子并行工作从而具有高度的灵活性和可编程性。测试结果表明,系统具有很好的性能:对地杂波的改善因子大于53dB;对气象杂波的改善因子大于40dB,当地杂波和气象杂波同时存在时,改善因子大于50dB。
This paper describes a newly developed radar AMTD processing system. The system filters out clutter by a fixed three-pulse MTI processor, filters motion clutches with an adaptive MTI filter (AMTI), and uses a cascaded Doppler filter bank to match the signal. The AMTI filter based on the maximum entropy spectrum estimation method realizes the optimal whitening of motion clutter. The system uses eight high-speed DSP chip parallel work with a high degree of flexibility and programmability. The test results show that the system has good performance: the ground clutter improvement factor is greater than 53dB; the improvement factor of meteorological clutter is greater than 40dB; and when the local clutter and meteorological clutter coexist, the improvement factor is greater than 50dB.