基于数字电视信号的无源雷达参考通道多径杂波抑制方法
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摘要
无源雷达利用第三方辐射源信号进行运动目标检测,在现在和未来电子战中具有重要作用。该体制雷达通常采用相关检测方法,但参考信号中常伴随多径杂波干扰。仿真表明,参考通道存在多径杂波干扰使目标检测性能下降,增加虚警并抬升检测基底。抑制多径杂波,提纯参考信号是主要问题。结合数字电视信号特性,给出利用k-前向预测算法抑制多径杂波的原理,基于最小均方误差准则实现滤波。仿真和实测数据处理结果验证了该算法的有效性。
Passive radar,which uses a third-party radiation source signal for moving target detection,plays a vital role in present and future electronic warfare. It usually uses the correlation detection method,but the reference signal is often accompanied by multi-path clutter interference. Simulation results show that multi-path clutter in the reference signal reduces the performance of target detection,increases the false alarm,and lifts the detection base. So suppressing multipath clutter is the main problem. In this paper,the principle of suppressing multipath clutter using k-forward prediction algorithm is given,and the filtering is realized based on least mean square error criterion. The simulation and real-life data results confirm the effectiveness of the proposed algorithm.
Passive radar,which uses a third-party radiation source signal for moving target detection,plays a vital role in present and future electronic warfare. It usually uses the correlation detection method,but the reference signal is often accompanied by multi-path clutter interference. Simulation results show that multi-path clutter in the reference signal reduces the performance of target detection,increases the false alarm,and lifts the detection base. So suppressing multipath clutter is the main problem. In this paper,the principle of suppressing multipath clutter using k-forward prediction algorithm is given,and the filtering is realized based on least mean square error criterion. The simulation and real-life data results confirm the effectiveness of the proposed algorithm.
引文
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[2]李纪传.无源雷达杂波对消关键技术及目标检测方法研究[D].北京:中国科学院文献情报中心,2015.
[3]Cardinali R,Colone F,Ferretti C,et al.Comparison of clutter and multipath cancellation techniques for passive radar[C]∥Proc of the IEEE Radar Conference.Boston:IEEE.2007:17-20.
[4]李纪传,吕晓德,向茂生,等.等效凹槽滤波器及其在无源相关定位雷达中的应用[J].雷达学报,2014,3(6):675-685.
[5]吴海洲,陶然,单涛.基于DTTB照射源的无源雷达直达波干扰抑制[J].电子与信息学报,2009,31(9):2 033-2 038.
[6]万显荣,岑博,易建新,等.中国移动多媒体广播外辐射源雷达参考信号获取方法研究[J].电子与信息学报,2012,34(2):338-343.
[7]杨建广,吴道庆.调频广播台直达波与地杂波强度分析[J].现代雷达,2005,27(12):33-36.
[8]赫金.自适应滤波器原理[M].4版.郑宝玉,等,译.北京:电子工业出版社,2010.