DSSS系统频域干扰抑制算法的信噪比损耗分析  

SNR-Loss Analysis of Frequency Domain Interference Suppression Algorithm in DSSS System

作　　者：李健伟[1] 李志强[1] 朱文明[1] 

机构地区：[1]解放军理工大学通信工程学院,江苏南京210007

出　　处：《通信技术》2014年第11期1266-1270,共5页Communications Technology

基　　金：国家自然科学基金(No.61032004;No.91338201);国家高技术研究发展计划("863"计划)(No.2012AA121605;No.2012AA01A510)~~

摘　　要：以DSSS系统中频域干扰抑制算法为研究对象,针对干扰抑制模块的引入会给通信系统带来信噪比损耗的问题,首先介绍了频域干扰抑制技术的基本思想,其次重点分析了频域干扰抑制算法影响信噪比损耗的具体因素,主要包括窗函数类型、窗长度、加窗重叠度、阈值处理以及IFFT变换后的数据处理方式,然后对各个影响因素进行理论推导,并结合仿真分析,给出了各种情况下信噪比的损耗值,为干扰抑制算法的参数设计提供了依据。With frequency domain interference suppression algorithm in DSSS system as the research object,and aiming at the problem that the introduction of interference suppression module would result in SNR loss in communication system,this paper firstly describes the basic idea of frequency domain interference suppression,then principally analyzes the specific factors of SNR loss affected by the algorithm,including the types of window function,window length,window overlap,threshold processing and data processing method after IFFT transformation,and then provides the theoretical derivation of each affecting factors. Finally,in combination of simulation analysis,the paper gives the value of SNR loss and provides a reference for the design of interference suppression algorithm.

关 键 词：DSSS 干扰抑制 加窗 阈值处理 信噪比损耗 

分 类 号：TN91[电子电信—通信与信息系统]