›› 2012, Vol. 25 ›› Issue (4): 68-.

• 论文 • 上一篇    下一篇

临近空间低仰角信号参数估计的研究

李孝强,杜巍,李鹏   

  1. (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)
  • 出版日期:2012-04-15 发布日期:2012-04-17
  • 作者简介:李孝强(1984—),男,硕士研究生。研究方向:无线通信中的参数估计及数字信号处理。

Near-Space Low-Elevation Parameter Estimation

 LI Xiao-Qiang, DU Wei, LI Peng   

  1. (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)
  • Online:2012-04-15 Published:2012-04-17

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。

关键词: 临近空间, 信道模型, 联合估计

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.

Key words: Near Space;Channel Model;Joint Estimation

中图分类号: 

  • TN911.7