系统工程与电子技术 ›› 2021, Vol. 43 ›› Issue (10): 2954-2960.doi: 10.12305/j.issn.1001-506X.2021.10.30

• 制导、导航与控制 • 上一篇    下一篇

卫星导航系统点波束功率增强信号参数优化设计

吕志成*, 李蓬蓬, 李立勋   

  1. 国防科技大学电子科学学院, 湖南 长沙 410073
  • 收稿日期:2020-10-16 出版日期:2021-10-01 发布日期:2021-11-04
  • 通讯作者: 吕志成
  • 作者简介:吕志成(1982—), 男, 副研究员, 博士, 主要研究方向为星基导航与定位技术|李蓬蓬(1985—), 男, 讲师, 博士, 主要研究方向为星基导航与定位技术|李立勋(1985—), 男, 讲师, 博士, 主要研究方向为星基导航与定位技术
  • 基金资助:
    青年自然科学基金(62003354)

Optimization design of satellite navigation system spot beam power enhancement signal parameters

Zhicheng LYU*, Pengpeng LI, Lixun LI   

  1. College of Electronic Science, National University of Denfense Technology, Changsha 410073, China
  • Received:2020-10-16 Online:2021-10-01 Published:2021-11-04
  • Contact: Zhicheng LYU

摘要:

导航卫星面向特定区域播发点波束功率增强信号, 是提高导航信号抗干扰性能的一种有效措施。针对点波束功率增强信号具有波束宽度窄、指向可变的特点, 研究了信号功率增强幅度、半波束角和扫描角等工作参数对覆盖性能的影响。分析结果表明, 功率增强幅度在0~20 dB变化时, 等效载噪比线性增加, 具有最好的增强效果。当高轨地球同步轨道(geosynchronous earth orbit, GEO)/倾斜地球同步轨道(inclined geosynchronous earth orbit, IGSO)卫星和中轨道(medium earth orbit, MEO)天线半波束角分别为0.86°和1.31°时, 在卫星发射总功率不变的条件下可实现20 dB的点波束功率增强, 对应的作用区半径分别为542 km和494 km。当GEO/IGSO卫星和MEO卫星天线扫描角分别取7.79°和11.90°时, 最大功率增强覆盖范围半径可达到9 046 km和8 538 km。

关键词: 卫星导航系统, 功率增强技术, 点波束

Abstract:

It is an effective measure to improve the anti-jamming performance of navigation signals that navigation satellites transmit spot beam power enhancement signals for specific regions. In view of the narrow beam width and variable direction of the spot beam power enhancement signal, the effects of working parameters such as power enhanced amplitude, half-beam angle and sweep angle on the coverage performance are studied. The analysis results show that when the amplitude of power enhancement varies from 0 to 20 dB, the equivalent noise ratio increases linearly and has the best enhancement effect. When the half-beam angles of geosynchronous earth orbit (GEO)/inclined geosynchronous earth orbit (IGSO) and medium earth orbit (MEO) satellite antenna are 0.86° and 1.31° respectively, the 20 dB power enhancement amplitude can be achieved with the corresponding radius of 542 km and 494 km. When the sweep angles of GEO/IGSO and MEO satellite antenna are 7.79° and 11.90° respectively, the maximum coverage radius reaches 9 046 km and 8 538 km.

Key words: satellite navigation system, power-enhanced technology, spot beam

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