信息网络安全

信息网络安全 ›› 2015, Vol. 15 ›› Issue (1): 12-15.doi: 10.3969/j.issn.1671-1122.2015.01.003

• 技术研究 • 上一篇    下一篇

北斗导航系统中天线阵的选择研究

刘宝国1, 徐凌伟1(), 张浩1,2   

  1. 1.中国海洋大学信息科学与工程学院,山东青岛 266100
    2.加拿大维多利亚大学电子与计算机工程学院,维多利亚 V8W 3P6
  • 收稿日期:2014-12-04 出版日期:2015-01-10 发布日期:2015-07-05
  • 作者简介:

    作者简介： 刘宝国（1988-）,男,山东,硕士研究生,主要研究方向：北斗抗干扰技术;徐凌伟（1987-）,男,山东,博士研究生,主要研究方向：MIMO无线通信;张浩（1975-）,男,江苏,教授,博士,主要研究方向：60GHz无线通信、MIMO通信;GULLIVER T A（1959-）,男,加拿大工程院院士,博士生导师,教授,主要研究方向：超宽带无线通信。

  • 基金资助:
    国家自然科学基金[60902005,61304222];山东省自然科学基金[ZR2012FQ021];青岛市国际科技合作项目[12-1-4-137-hz]

Study on Selection of the Antenna Array in Compass Navigation System

LIU Bao-guo1, XU Ling-wei1(), ZHANG Hao1,2, GULLIVER T A2   

  1. 1. Department of Information Science and Engineering, Ocean University of China, Qingdao Shandong 266100, China
    2. Department of Electrical and Computer Engineering, University of Victoria, Victoria V8W 3P6, Canada
  • Received:2014-12-04 Online:2015-01-10 Published:2015-07-05

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摘要：

北斗导航系统已经在军事以及民用导航方面起到了越来越重要的作用,虽然北斗信号通过使用扩频技术使其在一定程度上具有一定的抗干扰裕度,但由于其信号弱等特点,使其容易受到干扰的缺点越来越突出。干扰的多样性使得接收机仅使用时域或者空域滤波已经不能满足抗干扰的要求,并且在所有的干扰中,宽带干扰是对接收机影响最大的且最难滤除的干扰。针对这些问题,文章引入空时抗干扰技术。空时抗干扰技术在不增加阵元的情况下,增加了天线阵的自由度,从而有效地提高了抗干扰能力。空时抗干扰技术相对于单纯的频域、时域、空域抗干扰技术具有明显的优势,然而不同的天线阵对空时抗干扰的效果也有一定的影响。因此文章通过研究空时抗干扰技术中天线各阵列对宽带干扰的空时响应,以及各天线阵的改善因子,得到圆形天线阵不仅可以准确估计出干扰的方向角和俯仰角,并且其抗干扰效果最好,为北斗2代接收机的天线设计抗干扰处理提供了一定的理论基础。

关键词: 北斗导航系统, 空时抗干扰, 天线阵列, 改善因子

Abstract:

Compass navigation system has increasingly played more and more important roles in the military and civil navigation. Although the signal of compass using a spread spectrum technique makes it own a certain degree of interference margin, it still can be affected sensitively by interference due to its weak signal power. The diversity of interference makes anti-jamming difficulty by just using either time domain filtering technology or space domain filtering technology. Among all interferences, broadband interference is most influential and most difficult to overcome. To solve these problems, we use Space-Time adaptive processing technique in this article and it is more useful comparing with time domain filtering technology or space domain filtering technology or frequency domain filtering technology as it increases the degrees of freedom without increasing the number of antenna. However different antenna array has different influence using Space-Time adaptive processing technique. So in this article we have discussed the space-time responses of different antenna array and improvement factor of each antenna array. The simulation shows that circular antenna array plays better in anti-jamming process. It could provide a theoretical foundation in the design of BeiDou receiver.

Key words: compass navigation system, Space-Time adaptive processing technique, antenna array, improvement factor

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