一种多普勒容忍的抗间歇采样转发干扰的波形和滤波器联合设计方法

      A Doppler tolerant waveform and filter joint design method with anti-interrupted sampling repeater jamming

      • 摘要: 为解决间歇采样转发干扰(interrupted sampling repeater jamming, ISRJ)导致的雷达检测性能下降问题,提出了一种具有多普勒容忍性的抗ISRJ的发射波形与失配滤波器联合设计方法。在恒模和能量约束下,通过最小化发射波形和接收滤波器的互模糊函数(ambiguity function, AF)二维旁瓣电平、信噪比损失(signal-to-noise ratio loss, SNRL)、干扰信号失配滤波后的干信比、干扰信号归一化脉压峰值的建立和优化问题,通过基于优化-最小化框架的多普勒容忍干扰抑制(Doppler tolerance jamming suppression- majorization minimization framework, DTJS-MM)算法对所得的非凸问题进行转化求解。仿真结果表明:本文所提方法的SNRL与基于拉格朗日的交替方向乘子方法(Lagrange alternating direction method of multipliers, LADMM)和主优化干扰抑制迭代算法(majorized iterative algorithm for jamming suppression, MIAJS)相比分别降低0.146 dB和0.1375 dB;干扰信号脉压峰值分别降低5.73 dB和0.8 dB;互相关模糊函数平均旁瓣电平相较于模糊函数迭代赋形的坐标迭代(coordinate iteration for ambiguity function iterative shaping, CIAFIS)方法和迭代最小化模糊函数赋形(ambiguity function shaping via iterative minimization, AFSIM)方法分别降低5.6 dB和5.91 dB,零多普勒互相关函数峰值旁瓣电平分别降低3.31 dB和2.82 dB,验证了本文方法在降低SNRL、局部AF积分旁瓣电平和干扰信号脉压峰值等方面具有一定的有效性。

         

        Abstract: In order to solve the problem of interrupted sampling repeater jamming (ISRJ) and improve radar detection performance. A joint design method with Doppler tolerance for anti-interrupted sampling repeater jamming transmit waveform and mismatch filter is presented. Under constant modular and energy constraints, the optimization problem is established by minimizing the sum of the two dimensional sidelobe level of the transmit waveform and the receive filter cross correlation ambiguity function(AF), the signal-to-noise ratio loss(SNRL), interference signal ratio after interference signal mismatch filtering and the normalized pulse compression peak value of the interference signal. A Doppler tolerance jamming suppression algorithm based on the majorization-minimization framework (DTJS-MM) is presented to transform and solve the resulting non-convex problem. Simulation results show that the SNRL of the proposed method is 0.146 dB and 0.1375 dB lower compared with the Lagrange alternating direction method of multipliers (LADMM) method and the majorized iterative algorithm for jamming suppression(MIAJS) method, peak pulse compression of interfering signal is 5.73 dB and 0.8 dB lower, respectively. The average sidelobe level of the cross-correlation ambiguity function is 5.6 dB and 5.91 dB lower compared to the coordinate iteration for ambiguity function iterative shaping(CIAFIS) and ambiguity function shaping via iterative minimization (AFSIM) methods, zero Doppler correlation function peak sidelobe levels are 3.31 dB and 2.82 dB lower, respectively, it is verified that the method in this paper is effective in reducing the SNRL, the integral sidelobe level of local AF and the peak sidelobe level of pulse compression of interfering signals.

         

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