一种提高BOC信号伪码相位测量精度的无模糊捕获算法

An Unambiguous Acquisition Algorithm for Improving Pseudo Code Phase Measurement Precision of BOC Signal

针对二进制偏移载波BOC调制信号捕获的模糊性问题,以及伪码相位捕获精度不足的问题,提出一种基于互相关函数重构和三次样条插值的BOC信号无模糊捕获算法。首先利用重构的互相关函数对BOC调制信号进行粗捕获,再通过三次样条插值法提高伪码相位的捕获精度。理论分析和实验验证表明,算法能够消除BOC调制信号的捕获模糊性,并将伪码相位测量精度提高72%。

For the ambiguous acquisition problem of Binary Offset Carrier(BOC)modulated signal and the low acquisition precision of pseudo code phase,an unambiguous acquisition algorithm for BOC signal based on cross correlation function reconstruction and cubic spline interpolation is proposed.This algorithm firstly uses the reconstructed cross correlation function to coarsely acquire the BOC modulated signal,and then improves the acquisition accuracy of the pseudo code phase by cubic spline interpolation.Theoretical analysis and simulation results show that the algorithm can eliminate the ambiguous of BOC modulated signal and improve the precision of pseudo code phase measurement by 72%.