第三代移动通信CDMA导频信道PN码搜索方法和实现  

PN Code Search Method and Realization of the CDMA Pilot Channel of the 3^(rd) Generation Mobile Communication System

作　　者：冉一航 刘禹圻 王淑君 李鹏程 RAN Yihang;LIU Yuqi;WANG Shujun;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》2021年第4期43-47,共5页Electronic Information Warfare Technology

摘　　要：针对利用第三代移动通信CDMA(Code Division Multiple Access)信号辅助GPS(Global Positioning System)定位需要首先解决PN(Pseudo-noise Sequence)序列搜索相关峰的问题,研究CDMA信号调制机理和解调算法,仿真生成本地PN序列,并对实际采集的CDMA信号进行相关峰搜索。结果表明,目前部分频点发射CDMA信号,且PN码相位对相关峰搜索结果影响较大,为了获得准确的相关峰需要对所有相位进行遍历。研究结果对利用第三代移动通信CDMA实采信号相关峰进行时延估计进而联合定位提供基础。The correlation peaks of PN sequence should be searched in order to assist GPS positioning,using CDMA signal of the 3 rd generation mobile communication system.The CDMA modulation mechanism and demodulation algorithm are studied.The local PN sequence is generated by simulation.The correlation peaks of the actually collected CDMA signal are searched.The results are showed that CDMA signals are transmitted at some frequency points.The impact of the PN code phase on the correlation peaks is also validated.In order to obtain accurate correlation peaks,all phases needed to be traversed.A basis for time delay estimation and cooperative positioning is provided in use of the correlation peaks of actual CDMA signal.

关 键 词：CDMA PN码 相关峰 定位 

分 类 号：TN914.53[电子电信—通信与信息系统]