摘要
二进制偏移载波(BOC)调制信号目前已经被广泛应用于全球卫星导航系统的信号体制设计中,与传统的BPSK信号相比能提供更好的码跟踪精度和抗多径能力。针对BOC信号的自相关函数多峰性导致伪码捕获模糊的问题,在介绍BOC信号特性的基础上,对4种BOC信号精确捕获算法进行了仿真验证,并对算法的捕获性能进行了对比评估,计算机仿真结果表明4种算法均能解决BOC信号捕获模糊的问题,这对充分发挥BOC信号的性能优势具有现实意义。
The signal based on BOC Modulation has been widely used in signal architecture design of global navigation systems. Compared with traditional BPSK signal,it can provide better tracking accuracy and better resistance to multipath.For pseudocode ambig- uous acquisition caused by triultiple peaks of BOC signal,four unambiguous acquisition methods of BOC signal are simulated and veri- fied based on the characteristics of BOC signal, and the comparative evaluation for their acquisition performances are performed. The computer simulation results show that these four methods can effectively solve the problem of ambiguous acquisition of BOC signal, which has operation significance for the development of BOC signal performance advantages.
出处
《无线电工程》
2015年第12期36-39,共4页
Radio Engineering
基金
国家高新技术研究发展计划("863"计划)资助项目(2012AA121802)
关键词
BOC
精确捕获
自相关函数
binary offset carrier（BOC）
unambiguous aequisition
autocorrelation function
