幅相误差对数字多波束导航抗干扰影响分析

Influence analysis of amplitude and phase errors on digital multi-beam navigation anti-jamming system

针对数字多波束导航抗干扰过程中,由于天线一致性、射频通道误差等因素的影响,数字处理的接收信号幅度和相位将产生误差;以及波束零点对信号的幅相不一致性非常敏感,使利用零陷技术抗干扰的系统性能急剧下降等问题,提出一种幅相误差对数字多波束导航抗干扰影响的分析方法。实验结果表明:幅相误差对数字多波束导航抗干扰产生较大影响,会使系统部分或不能抑制干扰;相比幅度误差,相位误差对数字多波束导航抗干扰性能的影响效果更为明显;在抗干扰之前对信号进行幅相误差校正将大幅改善数字多波束导航抗干扰的性能。

Aiming at the problem that the problems that in the process of digital multi-beam navigation interference,due to the influence of antenna consistency,radio-frequency channel error and other factors,the received signal of digital processing may have amplitude and phase errors,and the beam zero is very sensitive to signal amplitude and phase consistency,so that the system performance by null technology declines sharply based on anti-jamming technology,this paper put forward an analysis method about the influence of amplitude and phase errors on the digital multi-beam navigation anti-interference.Experimental result showed that amplitude and phase errors would have a great impact on digital multi-beam navigation anti-interference,making the system partially or do not suppress interference;moveover,the influence of phase errors on the anti-jamming performance of digital multi beam navigation would be more obvious than that of the amplitude error;therefore,the errors of signal amplitude and phase were corrected before the anti-interference would greatly improve the performance of digital multi-beam navigation anti-jamming.