Journal of South China University of Technology (Natural Science Edition) ›› 2009, Vol. 37 ›› Issue (1): 27-33.

• Electronics, Communication & Automation Technology • Previous Articles     Next Articles

Fading Characteristics of HAPS Communication Channel in Dynamic Environment with Low Elevation Angle

Yang Ming-chuan1  Jiang Yi-cheng2  Guo Qing1  Na Zhen-yu1   

  1.  1. Communication Research Center, Harbin Institute of Technology, Harbin 150001, Heilongjiang, China; 2. Resarch Institute of Electronic Engineering, Harbin Institute of Technology, Harbin 150001, Heilongjiang, China
  • Received:2007-11-27 Revised:2008-01-09 Online:2009-01-25 Published:2009-01-25
  • Contact: 杨明川（1977-），男，博士生，主要从事无线移动信道研究． E-mail:mcyang@hit．edu．cn
  • About author:杨明川（1977-），男，博士生，主要从事无线移动信道研究．
  • Supported by:

    国家“863”计划项目（2006AA701116）;国家自然科学基金资助项目（60532030）

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Abstract:

In this paper, first, the coverage, link loss and rain attenuation characteristics of high-altitude platform station （HAPS） communications systems are analyzed. Next, according to the channel characteristics of the dynamic environment with a low elevation angle and on the basis of the propagation seaterring theory, a statistical mixedstate fading model is proposed by introducing a shadow coefficient. Then, the higher-order statistical characteristics of the model in different states are formulated. Finally, the first-order and higher-order statistical characteristics of the model are compared using the measured data, exact accordance being revealed. It is thus concluded that the proposed model is effective in analyzing the propagation characteristics, optimizing the modulation and coding schemes and simulating the performance of HAPS communication systems.

Key words: high-altitude platform station, wireless channel, propagation characteristic, fading characteristic, level crossing rate, average fading duration