中国民航大学学报

• 民用航空 •    下一篇

一种消除BOC(m,n)信号自相关函数副峰的方法

王剑a,戚涵天b   

  1. (中国民航大学a. 民航空管研究院;b. 中欧航空工程师学院,天津300300)
  • 收稿日期:2017-12-12 修回日期:2018-01-09 出版日期:2018-12-25 发布日期:2018-12-27
  • 作者简介:王剑(1961—),男,江苏徐州人,教授,博士,研究方向为通信与信息系统.
  • 基金资助:
    民航安全能力建设项目(AADSA0007);国家重点研发计划(2016YFB0502401)

Side lobe cancellation technique for BOC(m, n)signal ACF

WANG Jiana, Qi Hantianb   

  1. (a. Civil Ariation Air Traffic Management Institute; b. SIAE-Europen Intitute of Aviation Engeneering, CAUC, Tianjin 300300, China)
  • Received:2017-12-12 Revised:2018-01-09 Online:2018-12-25 Published:2018-12-27

摘要: 卫星导航系统中新体制BOC 信号的C/A 码自相关函数有多个副峰,多峰特性导致的模糊问题使信号的捕获和跟踪都增大了难度,对这类信号的研究大多局限于某一信号族类,而普遍适用的算法研究较少。根据BOC 自相关函数的特点提出消减自相关函数副峰的方法,能够保持主峰宽度不变,提高主峰与副峰的比值,便于BOC 的捕获和跟踪。仿真结果表明,即使存在噪声干扰,新算法的捕获成功率依然高于传统的BPSK-like 算法。

关键词: 卫星导航, 二进制偏移载波, 自相关函数, 信号捕获

Abstract: The new BOC modulation signal in navigation satellite systems has an ACF(autocorrelation function) with multiple side peaks, which induces an ambiguity problem during the signal synchronizing procedure. A side lobe cancellation technique is proposed based on ACF features. By applying the proposed technique, both the main peak and the side peaks are diminished but the main/side peak ratio is significantly increased, which makes it much easier to acquire and track the BOC signal. It is especially compared with traditional BPSK-like (binary phase shift keying-like) method and results show that the proposed technique performs much better in the acquisition success rate despite the noise interference.

Key words: navigation satellite, binary offset carrier, autocorrelation function, signal acquisition

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