多部雷达同时同地工作面临电磁兼容问题,某对空情报雷达因对方同频段雷达发射机产生的冲击干扰严重影响了探测性能.本文根据干扰特性提出一种基于恒虚警检测的冲击干扰时域抑制新算法.该算法应用恒虚警方式自适应设置干扰检测门限,利用逻辑判断进行干扰定位,增强了干扰检测的鲁棒性；运用时域相消在滤除干扰的同时保留了地杂波,防止因杂波泄漏而降低雷达探测性能.实测数据处理验证了算法的有效性.%Electromagnetic compatibility is a question when several radars work together. The performance of an air surveillance radar degrades significantly due to impulsive interference generated by rival cochannel radar transmitter. This paper proposed a novel constant-false-alarm-rate (CFAR) detection based impulsive interference mitigation algorithm according to the interference features. With cell average (CA) for adaptive thresholding and logical judgment for interference locating, the interference detection is more robust. What's more, the time-domain cancellation removes the impulsive interference while preserving the fidelity of the clutter component, or the leakage of strong clutter returns desensitizes the radar. The validity of the algorithm is verified by field experimental data.
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