一种基于CDMA信号的远近效应干扰对消算法  

A Far and Near Interference Cancellation Algorithm Based on CDMA Signal

作　　者：王淑君 刘振阳 冉一航 李鹏程 WANG Shujun;LIU Zhenyang;RAN Yihang;LI Pengcheng(Science and Technology on Electronic Information Control Laboratory,Chengdu 610036,China)

机构地区：[1]电子信息控制重点实验室,成都610036

出　　处：《电子信息对抗技术》2020年第4期53-56,共4页Electronic Information Warfare Technology

摘　　要：IS-95协议下的CDMA下行信号导频序列具有很强的互相关特性,使得接收捕获过程中存在强信号相关峰“淹没”弱信号的现象,弱信号无法捕获到正确相关峰码相位(远近效应干扰),远近效应干扰对基于CDMA下行信号的码相位捕获和跟踪带来很大误差。研究一种基于CDMA下行强基站信号再生对消算法来减少强信号对接收处理带来的影响,最终实现对弱信号相关峰码相位正确捕获和跟踪。Under the IS-95 agreement,the pilot sequence of the CDMA signal has strong cross-correlation characteristics.During signal reception and acquisition,there is a phenomenon that strong signal correlation peak may blur weak signal correlation peak.Therefore,the acquisition of weak signal is false.The far and near effect interference brings a great error to the code phase acquisition and tracking based on the CDMA downlink signal.A serial interference cancellation(SIC)algorithm based on the CDAM downlink signal is proposed to cancel the far and near interference.

关 键 词：CDMA下行信号 远近效应干扰 串行对消 IS-95协议 干扰对消 

分 类 号：TN914.53[电子电信—通信与信息系统]