一种改进的导航信号窄带干扰抑制方法
首发时间:2012-04-01
摘要:针对导航信号中的窄带干扰,提出了一种基于频域处理的LMS窄带干扰抑制方法。该方法在传统的LMS滤波器结构中引入权值泄漏因子a以减少导航信号中的有用信号在滤波过程中的损失;同时,通过采用权值系数稳定度d的判断处理以去除导航信号中的变频窄带干扰。仿真结果显示,该方法对固频和变频的窄带干扰都有很好的抑制效果。与导航接收机的对接试验表明,该方法可以大大的提高导航接收机的抗干扰性能。
关键词: 窄带干扰 泄漏因子 权值系数稳定度 最小均方(LMS) 导航接收机
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An improved method for Narrowband interference suppression in navigation signal
Abstract:In order to suppress narrowband interference in navigation signal, an improved method based on frequency-domain LMS is proposed in this paper. By using the weight leakage factor, the method can reduce the loss of the desired signal in filter process. Meanwhile, with the judgment of the weight coefficient stability, the method can effectively suppress variable frequency narrowband interference. Simulation results show that the effectiveness of the proposed method in suppressing the narrowband interferences of both fixed and variable frequency. Tests on navigation receiver show that the method can greatly improve the anti-jamming performance of the navigation receiver.
Keywords: narrowband interference leakage factor weight coefficient stability LMS(least mean square) navigation receiver
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