一种BDS B1C信号捕获改进方法  

An improved method for BDS B1C signal acquisition

作　　者：冯瑞 马宏 任宇飞 FENG Rui;MA Hong;REN Yufei(Department of Electronics and Optical Engineering,Space Engineering University,Beijing 101416,China;National Time Service Center of Chinese Academy of Sciences,Xi’an 710600,China)

机构地区：[1]航天工程大学电子与光学工程系,北京101416 [2]中国科学院国家授时中心,西安710600

出　　处：《导航定位学报》2019年第3期63-68,75,共7页Journal of Navigation and Positioning

基　　金：国家自然科学基金项目(60972062)

摘　　要：针对B1C信号复杂的特点和捕获的复杂性,提出一种基于ASPeCT的BOC(1,1)信号捕获算法:通过对B1C信号的接收体系建立数学模型,与相关信号的传统捕获算法进行比较,说明各自捕获时存在的问题,在此基础上提出B1C信号的改进捕获算法;最后作捕获仿真分析,利用蒙特卡洛方法模拟验证捕获检测概率。结果表明,该算法可缩短捕获时间,同时检测概率与匹配算法的相同,能够有效完成捕获的要求。Aiming at the complex characteristics and acquisition complexity of B1C signals,the paper proposed a BOC(1,1)signal acquisition algorithm based on ASPeCT:a mathematical model for the receiving system of B1C signals was established,and the traditional acquisition algorithms of related signals were compared to analyze the problems existed in the respective acquisitions,then the improved acquisition algorithm of B1C signals was given;finally the simulational analysis of acquisition was carried out to verify the detection probability of acquisition with Monte Carlo method.Result showed that the proposed algorithm could not only shorten the acquisition time,but also keep the same detection probability as the matching algorithm,which could meet the requirement of acquisition.

关 键 词：北斗卫星导航系统 B1C信号 自相关边峰消除技术(ASPeCT) 二进制偏移载波(BOC)(1 1)非匹配 捕获检测概率 

分 类 号：TN967.1[电子电信—信号与信息处理]