间歇采样转发干扰(ISRJ)是一种能有效欺骗相干雷达的有源干扰,尤其针对线性调频雷达,回波信号经过脉冲压缩能够产生一系列的虚假目标。为对抗这类干扰,同时考虑到动目标场景下对波形的高多普勒容限要求,文中首先提出了一种基于模糊函数理论的波形设计方法。然后,在提前认知干扰信号的基础上,以理想化设计波形的相关函数为目标建立了优化模型,并考虑了波形的恒模约束。由于所形成的问题是个非凸问题,因此提出了一种交替循环算法迭代求解该问题。最后,通过仿真验证了所提方法的有效性,所设计波形具有较高的多普勒容限,同时能够有效对抗ISRJ 干扰,当干扰认知存在一定偏差时文中方法具有稳健性。

Interrupted sampling repeater jamming (ISRJ) is an active jamming for effectively deceiving coherent radar, especially for linear frequency modulated radar, whose received signal can generate a series of false targets after pulse compression. In order to counter this kind of jamming, meanwhile, considering the high Doppler tolerance requirement of waveform in the moving target scene, a waveform design algorithm based on ambiguity function is proposed in this paper. With the cognition of jamming in advance,an optimization model is established to idealized the correlation function of the waveform to design, and the constant modulus constraint for transmitted waveform is considered. Since the problem is non-convex, an alternate cycle algorithm is proposed to solve the problem. Eventually, the effectiveness of the proposed method is verified by simulation, and the waveform designed with high Doppler tolerance can effectively suppress the ISRJ. The method proposed is robust to the cognitive bias error of the jamming.

TN974

四川省科技计划资助项目(2023NSFSC1385);国家自然基金资助项目(62001084)