| 临近空间低仰角信号参数估计的研究 |
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| 引用本文： | 李孝强,杜巍,李鹏.临近空间低仰角信号参数估计的研究[J].电子科技,2012,25(4):68-70. |
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| 作者姓名： | 李孝强 杜巍 李鹏 |
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| 作者单位： | (1.中国电子科技集团公司第20研究所 通信事业部,陕西 西安 710068;2.民航西北空管局 通信网络中心,陕西 西安 710075;3.上海无线电设备研究所 4室,上海 200090) |
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| 摘 要： | 由于低仰角测控通信具有大动态、大范围的多径衰落和多普勒频移,因此低仰角测控通信是临近空间通信的难点。文中主要讨论了临近空间低仰角测控通信中的两个基本问题:临近空间测控通信低仰角情况下的信道建模与仿真,以及临近空间低仰角测控信号参数的估计。通过仿真结果可以看出,文中所提出的最大似然联合估计方法性能较好,在地空二径信道模型中可以达到联合参数估计的CRB要求。
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| 关 键 词： | 临近空间 信道模型 联合估计 |
Near-Space Low-Elevation Parameter Estimation |
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| LI Xiaoqiang,DU Wei,LI Peng.Near-Space Low-Elevation Parameter Estimation[J].Electronic Science and Technology,2012,25(4):68-70. |
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| Authors: | LI Xiaoqiang DU Wei LI Peng |
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| Affiliation: | (1.Communication Business Unit,NO.20 Institute,CETC,Xi'an 710068,China;2.Communication Network Center,Northwest Civil Aviation ATM Bureau,Xi'an 710045;3.Room 4,Shanghai Radio Equipment Research Institute,Shanghai 200090,China) |
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| Abstract: | Near-space Telemetry,Tracking and Commanding(TT&C) communications are of great importance in military applications.Due to the existence of dynamic,wide-range multipath fading and Doppler frequency shift,the low-elevation TT&C communication is especially difficult in near-space TT&C communications.In this article,two fundamental problems in near-space low-elevation TT&C communications are studied:the channel model in near-space low-elevation TT&C communications is constructed;and simulations are correspondingly conducted.The parameters of the near-space low-elevation TT&C signals are estimated.Simulation results show that the proposed estimation method has good performance and meet the CRB requirements of joint parameter estimation. |
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| Keywords: | Near Space Channel Model Joint Estimation |
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