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有源压制干扰从雷达天线的主瓣进入雷达内部,干扰信号很强时,将严重影响雷达的检测性能。传统的旁瓣消隐、旁瓣相消以及低副瓣天线等技术难以奏效。文中分析了盲源分离技术应用雷达主瓣抗干扰时盲源分离的信号存在幅度、相位的不确定性,提出了一种联合盲源分离和分数阶傅里叶变换的雷达抗主瓣干扰的新方法。并给出新方法与传统脉冲压缩方法主瓣干扰抑制的仿真结果,仿真结果表明了在强噪声压制干扰环境中,新方法具有良好的抗主瓣干扰的性能。
Active suppression interference from the main antenna of the radar antenna into the radar internal, strong interference signal, it will seriously affect the detection performance of the radar. Traditional sidelobe blanking, side lobe cancellation and low sidelobe antennas and other techniques is difficult to work. In this paper, the blind amplitude separation and phase uncertainty of the blind source separation when the blind main source separation is applied are analyzed. A new jamming method based on blind source separation and fractional Fourier transform is proposed new method. The simulation results show that the new method has a good performance against mainlobe jamming in strong noise suppression jamming environment.