扩频系统频域窄带干扰抑制算法加窗损耗研究  

Study on Windowing Degradation of Frequency-Domain Narrowband Interference Suppression Algorithms in Spread Spectrum System

作　　者：曾祥华[1] 李峥嵘[1] 王飞雪[1] 

机构地区：[1]国防科技大学卫星导航定位研发中心,长沙410073

出　　处：《电子与信息学报》2004年第8期1276-1281,共6页Journal of Electronics & Information Technology

基　　金：国家部级资助项目

摘　　要：扩频系统频域抗干扰算法通常采用数据加窗降低截断引起的频谱泄漏,采用数据重叠降低加窗带来的信噪比损耗.该文分析了数据加窗带来的信噪比损耗,研究了采用数据重叠后的信号合成输出问题,在Capozza(2000)的重叠选择输出方法的基础上提出了一种重叠相加输出方法.理论分析和仿真结果表明,与重叠选择输出方法相比,重叠相加输出方法减小了数据加窗引入的信噪比损耗,代价是增加了少量的加法运算.In spread spectrum system, frequency-domain interference suppression algorithms always use data windows to reduce the spectral leakage associated with truncation, and employ overlap to lessen the SNR degradation due to windowing. In this paper, the windowing degradation and the data composing are studied. An improved method has been put forward to compose the data after overlap based on Capozza's(2000) method. The analyzed and simulated results show that the new method leads to a less SNR degradation than Capozza's method at the cost of a few more addition.

关 键 词：频域抗干扰 加窗损耗 重叠 数据合成 

分 类 号：TN914.42[电子电信—通信与信息系统]