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针对电子对抗中的欺骗干扰鉴别问题,提出了基于频率分集阵列(frequency diverse array,FDA)的干扰鉴别方法。FDA波束具有距离—角度二维耦合特性,当波束聚焦距离与真实目标不一致时,会产生角误差信号,即干扰角度在相控阵中与真实目标一致,而在FDA中与真实目标不一致。因此,利用相控阵和FDA分别进行参数测量,比对测量结果即可实现干扰鉴别。提出了基于FDA进行干扰鉴别的具体流程,给出了两种双波束测量的实现方案,并对各方案的目标检测及参数估计性能进行了理论分析。仿真结果证明了该方法的有效性。
In order to solve the problem of deception jamming in electronic warfare, an interference identification method based on frequency diverse array (FDA) is proposed. The FDA beam has a distance-angle two-dimensional coupling characteristic. When the beam focusing distance is different from the real target, an angular error signal is generated. That is, the interference angle is consistent with the real target in the phased array, and is inconsistent with the real target in the FDA. Therefore, the use of phased array and FDA parameters were measured, compared to the measurement results to achieve interference identification. The specific procedure of interference identification based on FDA is presented. Two schemes of dual-beam measurement are given, and the target detection and parameter estimation performance of each scheme are analyzed theoretically. Simulation results show the effectiveness of this method.