根据排队论，认为ＡＲＭ导引头接收多部雷达信号脉冲流是一个泊松（ｐｏｉｓｓｏｎ）流．依据泊松流和实时处理的要求，提出用最小二乘拟合法．经过实验，取得了满意的效果即滤除了异部信号干扰． According to the queuing theory, it is considered that the ARM seeker receives multiple radar signal pulse streams as a poisson stream. According to Poisson flow and the requirements of real-time processing, the least squares fitting method is proposed. After experiments, achieved a satisfactory effect that is filtered except heterodyne signal interference.