基于副峰叠加的BOC导航信号捕获算法

doi:10.12305/j.issn.1001-506X.2023.07.32

摘要/Abstract

摘要：

面向二进制偏移载波(binary offset carrier, BOC)信号，设计了一种基于副峰叠加的捕获算法。通过构造辅助函数并与BOC信号相关，产生相关曲线, 其仅在两个固定位置存在等高副峰，再将副峰移位叠加并与BOC自相关曲线相乘获得单峰捕获曲线，实现无模糊BOC捕获。与现有BOC捕获方法相比，该算法更具普适性，适用于任意阶的BOC信号，且单峰捕获曲线主瓣更窄，捕获概率更高。计算机仿真验证了该算法的性能优势。

关键词: 二进制偏移载波信号, 捕获, 副峰叠加, 全球卫星导航系统

Abstract:

A novel acquisition algorithm for binary offset carrier (BOC) signals is developed, based on sub-peak superposition. First, by designing an auxiliary function and correlating it with the BOC signal, a correlation curve with two sub-peaks can be generated. After that, by shifting and superposing the sub-peaks, and then multiplying the superposition result with the BOC autocorrelation curve, a single-peak acquisition curve can be obtained that enables the unambiguous BOC acquisition. Compared with the existing BOC acquisition algorithms, the proposed one is universal and suitable for the BOC signal with any order. Meanwhile, it generates the acquisition curve with a narrower single peak, thereby yielding higher acquisition probability. Numerical simulations demonstrate the superior acquisition performance of the proposed algorithm.

Key words: binary offset carrier (BOC) signal, acquisition, sub-peak superposition, global navigation satellite system (GNSS)

中图分类号:

TN967.1

陈林, 靳云迪, 黄杰, 林静然, 张亚乾. 基于副峰叠加的BOC导航信号捕获算法[J]. 系统工程与电子技术, 2023, 45(7): 2211-2219.

Lin CHEN, Yundi JIN, Jie HUANG, Jingran LIN, Yaqian ZHANG. Acquisition algorithm for BOC navigation signals based on sub-peak superposition[J]. Systems Engineering and Electronics, 2023, 45(7): 2211-2219.

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算法	是否需要辅助序列	形成辅助相关曲线是否需要移位	消除副峰是否需要系数调整
ASPeCT	否	否	是
GRASS	是	否	是
Yan	否	是(1/N码片)	否
BASS	是	是(0.5码片)	否

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