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大气波导中多径信道的参数研究

赵小龙1,2;黄际英1
  

  1. (1. 西安电子科技大学 理学院,陕西 西安 710071;
    2. 天水师范学院 物信学院,甘肃 天水 741001)
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2008-04-20 发布日期:2008-03-28
  • 通讯作者: 赵小龙

Research on multi-path channel parameters in the marine atmospheric duct

ZHAO Xiao-long1,2;HUANG Ji-ying1
  

  1. (1. School of Science, Xidian Univ., Xi′an 710071, China;
    2. Tianshui Normal Univ., Tianshui 741001, China)
  • Received:1900-01-01 Revised:1900-01-01 Online:2008-04-20 Published:2008-03-28
  • Contact: ZHAO Xiao-long

摘要: 针对海上大气波导环境中电磁波的多径传播特性,基于容量有限的Markov生灭过程得到了大气波导中到达接收站的射线径数.根据差分时延试验数据的近似瑞利分布提出了大气波导中的三参数模型,基于最小方差准则确定了模型参数.利用MUSIC算法对多径到达角进行最佳估计,数值仿真结果表明MUSIC算法极大地提高了到达角位置处的信噪比.

关键词: 大气波导, 多径信道, 径数, 差分时延, 到达角

Abstract: Based on the characteristics of EM multi-path propagation in the marine atmospheric duct and the Markov birth-and-death process in finite space, the path number in the marine atmospheric duct is presented. The excess delay three-parameter model is proposed according to the experimental data with approximate Rayleigh distribution, and the model parameters are determined by the minimum variance criteria. The angles of arrival (AOA) is estimated by the MUSIC algorithm and simulation results show that the MUSIC algorithm can significantly increase the SNR at the AOA. Finally, the multi-eigenpath channel model is proposed for contributing to the system design and performance optimization of the marine microwave communication system.

Key words: atmospheric duct, multi-path channel, path numbers, excess delay, angles of arrival (AOA)

中图分类号: 

  • TN011