一种基于Bump-Jump的BOC(1，1)信号码跟踪方法

BOC调制方式使Galileo信号与传统GPS中的BPSK信号相比有着良好的抗多径和抗单频干扰特性,但由于其自相关函数的多峰值性,会带来跟踪误锁问题。文中以BOC(1,1)信号为例,详细介绍Bump-Jump跟踪算法的传统设计思想,并在此基础上提出一种新的利用鉴别器实现误锁判断的码跟踪方法,且在现有的Galileo软件仿真平台上进行验证。实验结果表明,方法能有效地减少误锁,使码跟踪环路正确地跟踪主峰。

A Code Tracking Method Based on Bump-Jump for BOC(1,1)

Compared with the BPSK signals,BOC signals have a lower inherent tracking noise,better multipath and narrow- band interference mitigation.But the multi-peak characteristic of BOC signal' s autocorrelation function may result in the false lock problem.Taking BOC (1,1)signal as an example,this paper not only analyzes the traditional design of Bump-Jump algorithm in detail,but also puts forward a new code tracking method based on the discriminator.Besides,this method is verified on the existed Galileo software...