GPS辐射源的无源雷达两级干扰抑制方法  

A two-stage disturbance cancellation method for GPS based passive radar

作　　者：徐定杰[1] 吕东泽[1] 沈锋[1] 

机构地区：[1]哈尔滨工程大学自动化学院,黑龙江哈尔滨150001

出　　处：《哈尔滨工程大学学报》2012年第3期336-341,共6页Journal of Harbin Engineering University

基　　金：国家自然科学基金资助项目(60704018;61102107);中国博士后科学基金资助项目(20100480979)

摘　　要：为了解决回波通道内的干扰抑制问题,根据基于GPS辐射源无源雷达的特点,提出了一种ECA与CLEAN相结合的两级干扰抑制方法,即第1级采用ECA消除直达波干扰和多径干扰,第2级采用CLEAN算法迭代地消除强目标回波旁瓣干扰.该方法可以全面地抑制回波通道内的干扰,并且无需估计干扰参数,有效避免了干扰参数估计误差引起的抑制性能下降.仿真结果表明了该方法的有效性.As a new radar detective system,passive radar which is based on a GPS illuminator is attracting increasing attention.The method of suppressing interference in the echo channel is a key point due to the weak GPS scattered signals.According to the character of the passive radar based on GPS,a two-stage disturbance cancellation method combining ECA and CLEAN was proposed to suppress the interference.In the first stage,ECA was used to remove the direct-path and multi-path interference.In the second stage,the CLEAN algorithm was used to iteratively suppress the side-lobe interference of the strong target echo.The method can effectively restrain disturbance in the channel without estimation of the disturbance parameter,thereby avoiding reduction of the restraint performance caused by the disturbance parameter estimation error.Its effectiveness is demonstrated with the simulation results.

关 键 词：无源雷达 GPS辐射源 干扰抑制 ECA算法 CLEAN算法 

分 类 号：TN957.51[电子电信—信号与信息处理]