基于AIC技术的舰载天线共址耦合干扰抑制方法研究

Study on the co-site interference suppression of shipboard antennas based on AIC method

天线间的共址耦合干扰是一种常见的舰船电磁干扰问题,严重影响了舰船总体作战性能的提高。本文提出了采用自适应干扰抵消技术解决此问题的方法,分析了其基本原理,给出了干扰抵消系统的实现方案以及实验室验证结果。该技术利用矢量合成的方法调整取样信号的幅度与相位,在接收端与干扰信号合成从而相互抵消。结果表明,自适应干扰抵消系统使干扰抵消比达到40 dB以上,可以很好地解决舰载天线间的共址耦合干扰问题。

Co-site coupling interference between transmitting and receiving antennas is one of the main electromagnetic interferences in modern warships,and it seriously affects the warship＇s battling performance.This paper analyses the principle of interference suppression using adaptive interference cancellation（AIC）method,and describes an implementing scheme.At last,an experiment programme and some results are provided to demonstrate the effectiveness of the AIC system.Experiment results prove that an interference cancellation rate more than 40 dB can be achieved using this method.