摘要
针对BOC(Binary Offset Carrier)信号的自相关函数存在多峰性,从而造成同步过程中模糊性的问题,提出了一种基于PCF(Pseudo Correlation Function)算法的同步算法。该算法首先将本地伪码和本地副载波调制到本地产生的辅助信号,再将本地调制后的信号与处理后的接收信号进行相关处理,最后将相关结果进行一定形式的运算得到只有一个单峰的相关函数。并且对提出算法进行了性能分析和仿真比较,结果表明该算法能完全消除同步过程中BOC信号自相关函数的模糊性,并且可以通过改变参数的值来提高捕获精度和捕获性能。
For the problem of unambiguity in synchronization which is caused by the autocorrelation function for BOC (Binary Offset Carrier) signals with multiple peaks, a synchronization algorithm based on PCF (Pseudo Cor- relation Function) is proposed. The local auxiliary signal is modulated with local PN code and local subcarrier, and then the result is correlated with received signal. It obtained a correlated function with single peak. Performance analysis and simulation comparison show that the proposed algorithm can be a solution to eliminate unambiguity com- pletely. The acquisition accuracy and acquisition performance can be improved by modifying the Value of parament.
出处
《科学技术与工程》
北大核心
2013年第28期8280-8283,8501,共5页
Science Technology and Engineering
基金
国家自然科学基金项目(61071196
611021 31)
教育部新世纪优秀人才支持计划项目(NCET-10-09 27)
信号与信息处理重庆市市级重点实验室建设项目(CSTC2009CA 2003)
重庆市杰出青年基金项目(CSTC201 1jjjq40002)
重庆市自然科学基金项目(CS TC2010BB2398
CSTC2010BB2409
CST C2010BB2411
CSTC2012JJA40008)
重庆市教育委员会科研项目(KJ120525)的资助
关键词
PCF算法
BOC信号
无模糊
同步
PCF algorithm BOC signal unambiguity synchronization