卫星扩频通信中一种简化的窄带干扰抑制方法  

A simplified method for narrowband interference suppression in satellite spectrum-spread communication

作　　者：梁继业[1] 刘会杰[1] 杨琳[2] 梁旭文[1] 杨根庆[1] 

机构地区：[1]中科院上海微系统与信息技术研究所,上海200050 [2]电子科技大学,四川成都610054

出　　处：《电路与系统学报》2004年第6期86-89,共4页Journal of Circuits and Systems

摘　　要：针对卫星扩频通信中的强窄带干扰,提出了一种基于频域处理的窄带干扰抑制技术。该技术采用了简化的自适应方法估计接收信号中噪声的功率,确定窄带干扰与噪声之间的阈值。通过降低高于阈值的干扰谱线的幅度同时保持这些谱线的相位信息,降低了处理后信号中的干扰能量,使接收信号信噪比大大提高。该窄带干扰抑制算法的复杂度比较小,硬件实现占用的资源较少。According to the characteristics of strong narrowband interference in satellite spectrum-spread communication, a method for narrowband interference suppression is presented. This method is based on the frequency-domain processing. A simplified adaptive algorithm is used to estimate the noise power from received signals and further determine a threshold distinguishing narrowband interference from noise. By suppressing the magnitude of those interference spectral lines which magnitude exceeds the threshold while retaining their phase information, the interference power is reduced and thus the SNR of received signals is improved dramatically. This method is simple and can be implemented with less hardware.

关 键 词：卫星扩频通信 窄带干扰抑制 DFT 噪声估计 

分 类 号：TN927.2[电子电信—通信与信息系统]