| 低轨卫星频谱感知的二维差值迭代分割 |
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| 引用本文： | 马陆,陈晓挺,龚文斌,梁旭文.低轨卫星频谱感知的二维差值迭代分割[J].宇航学报,2011,32(4). |
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| 作者姓名： | 马陆 陈晓挺 龚文斌 梁旭文 |
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| 作者单位： | 上海微小卫星工程中心,上海,200050;中国科学院上海微系统与信息技术研究所,上海,200050 |
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| 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.
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| 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 |
A Two-Dimensional Difference Iterative Partition Algorithm for LEO Network' s Spectrum Sensing |
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| MA Lu,CHEN Xiao-ting,GONG Wen-bin,LIANG Xu-wen.A Two-Dimensional Difference Iterative Partition Algorithm for LEO Network' s Spectrum Sensing[J].Journal of Astronautics,2011,32(4). |
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| Authors: | MA Lu CHEN Xiao-ting GONG Wen-bin LIANG Xu-wen |
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| Institution: | MA Lu1,2,CHEN Xiao-ting1,GONG Wen-bin1,LIANG Xu-wen1,2(1.Shanghai Engineering Center for Micro-Satellites,Shanghai 200050,China,2.Shanghai Institute of Micro-System and Information Technology,CAS Shanghai 200050,China) |
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| 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 sig... |
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| Keywords: | LEO satellite communication Spectrum sensing Two-dimensional difference iterative partition Passive location |
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