宇航学报 ›› 2011, Vol. 32 ›› Issue (4): 851-856.doi: 10.3873/j.issn.1000-1328.2011.04.022

• 电子信息 • 上一篇    下一篇

低轨卫星频谱感知的二维差值迭代分割

马陆1,2, 陈晓挺1,2, 龚文斌1,2, 梁旭文1,2   

  1. 1.上海微小卫星工程中心,上海 200050;2. 中国科学院上海微系统与信息技术研究所,上海  200050
  • 收稿日期:2010-04-01 修回日期:2011-03-04 出版日期:2011-04-15 发布日期:2011-04-26
  • 基金资助:
    上海市自然科学基金(09ZR1430400)

A Two-Dimensional Difference Iterative Partition Algorithm for LEO Network’s Spectrum Sensing

MA Lu1,2, CHEN Xiao-ting1,2, GONG Wen   

  1. 1.Shanghai Engineering Center for Micro\|Satellites, Shanghai 200050,China;2. Shanghai Institute of Micro\|System and Information Technology, CAS Shanghai 200050, China
  • Received:2010-04-01 Revised:2011-03-04 Online:2011-04-15 Published:2011-04-26

摘要: 在低轨卫星通信系统中应用频谱感知技术,必须解决波束覆盖范围过大造成感知结果空间分辨率过低的问题。提出了二维差值迭代分割算法,利用地球自转引起的轨道面旋转方向,以及卫星行进方向上的波束重叠,经迭代计算获得波束下各子区域的频谱环境数据。经仿真表明此算法可以有效分割波束,并在6dB以上的信噪比条件下结合能量检测器准确定位主用户信号,从而满足低轨卫星通信系统的应用需求。

关键词: 低轨卫星通信, 频谱感知, 二维差值迭代分割, 无源定位

Abstract: For the application of spectrum sensing technique in the LEO satellite communication system, the problem of low space\|resolution in sensing results caused by the excessive beam coverage needs to be addressed. A two\|dimensional difference iterative partition algorithm is proposed. The algorithm is used to obtain the spectrum environmental data of sub\|regions under the beam by iterative calculation. The simulation shows that this method can effectively split beam, and the primary user signal with more than 6dB signal\|noise ratio can be accurately positioned by using a energy detector. Consequently, it meets the LEO satellite communication system application.

Key words: LEO satellite communication, Spectrum sensing, Two-dimensional difference iterative partition,  , Passive location

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