用DSP(TMS320C25)实现雷达杂波自适应抑制

Adaptive Implementation of Radar Clutter Cancellation by DSP Chips

探讨了自适应抑制雷达杂波的实时信号处理问题,分析了在最小均方准则下的LMS,MLMS算法,进行了系统性能模拟.并研制了一种用DSP的自适应MTI系统,该系统对杂波环境有较好的自适应能力,对地杂波及运动杂波有较好的抑制效果,在雷达实测中,改善因子大于20dB。

An approach is presented for the implementation of real time adaptive radar clutter cancellation systems. In order to control coefficients of FIR prediction error filter (PEF), the criteria of least mens square error (LMS) and modified least root mean square error (MLMS) algorithm are analyzed. System performance simulation eaperiments were implemented . A prototype adaptive moving target indicator (MTI) system is developed, built upon DSP chips. It has good adaptive cancellation performance for ground clutter and moving clutter. The measured improvement factor is more than 20 dB in a radar system.