基于初相匹配滤波的有源欺骗干扰抑制

An Interference Suppression of Active Deception Jamming Based on Initial Phase Match Filtering

针对有源欺骗干扰提出了一种新型的基于初相匹配滤波的干扰抑制方法。首先,基于相参雷达接收机匹配滤波器得到脉压信号矩阵。其次结合该矩阵中目标和干扰脉压尖峰矢量,基于最大平均信号干扰能量比(信干比)输出推导出了初相匹配滤波的响应函数解析式,形成了基于有源欺骗干扰抑制的初相匹配滤波算法。该算法在保证目标脉压尖峰矢量不损失的前提下具有较好的抗干扰改善因子。仿真结果表明当雷达发射脉冲串脉冲数为60时,在Swerling I目标起伏下,该算法抗干扰改善因子(干扰抑制深度)为20dB左右。在Swerling II目标起伏下,该算法干扰抑制深度为19dB左右。

A new type of interference suppression method based on initial phase match filtering （IPMF） is proposed in view of active deception jamming. Based on matched filter of coherent radar receiver pulse compression signal matrix is obtained. Combined with pulse compression vectors of tar- gets and jamming in the matrix, based on the maximum output of signal-to-jamming ration （SJR）, the matched filter response function of initial phase is deduced to form the IPMF algorithm in active de- ception jamming environment. Without loss of target echoes the IPMF has a better signal-to-jamming improvement factor. The simulation shows when the number of pulses in radar echoes is 60, the IPMF has a signal-to-jamming ratio improving factor （IF） of about 20dB in Swerling I, while it has an IF of about 19dB in Swerling II.