北京邮电大学学报

  • EI核心期刊

北京邮电大学学报 ›› 2014, Vol. 37 ›› Issue (2): 99-103.doi: 10.13190/j.jbupt.2014.02.021

• 研究报告 • 上一篇    下一篇

天线指向不精确时LMS信道模型

廖希1, 刘乃金2, 钱晋希1, 赵旦峰1, 王杨1   

  1. 1. 哈尔滨工程大学 信息与通信工程学院, 哈尔滨 150001;
    2. 中国空间技术研究院 通信卫星事业部, 北京 100094
  • 收稿日期:2013-06-21 出版日期:2014-04-28 发布日期:2014-04-08
  • 作者简介:廖希(1988- ),女,博士生,E-mail:hjklx1988@163.com;赵旦峰(1961- ),男,教授,博士生导师.
  • 基金资助:

    中国博士后自然科学基金项目(2011M500640);黑龙江省博士后科学基金项目(LBH-Z10206);中央高校基本科研业务专项基金项目(HEUCF130802)

Land Mobile Satellite Channel Model for Antenna Pointing Inaccuracy

LIAO Xi1, LIU Nai-jin2, QIAN Jin-xi1, ZHAO Dan-feng1, WANG Yang1   

  1. 1. College of Information and Communication Engineering, Harbin Engineering University, Harbin 150001, China;
    2. Department of Communications Satellite, China Academy of Space Technology, Beijing 100094, China
  • Received:2013-06-21 Online:2014-04-28 Published:2014-04-08

摘要:

针对陆地移动卫星系统中体积大、柔性强的星载天线使陆地移动卫星信道传播参数不稳定的问题,提出由星载天线振颤引起天线指向不精确的陆地移动卫星信道模型.研究复时间序列的衰落统计特性及在振颤临界值范围内对一阶统计特性的影响.仿真结果表明,天线振颤对所建信道模型的一阶衰落统计特性影响不明显,而对二阶衰落统计特性影响较大;在临界值范围内,对一阶衰落统计特性的影响小到可以忽略;在精确同步时,对陆地移动卫星系统的误码率影响较小.

关键词: 星载天线振颤, 陆地移动卫星信道, Corazza信道模型, 卫星仰角, 最大多普勒频移

Abstract:

In order to solve the problems that the propagation parameters instability of land mobile satellite (LMS) channel caused by large volume, strong flexibility of the space-borne antenna for LMS system, a LMS channel model for antenna pointing inaccuracy is proposed from the reason of vibration of space-borne antenna. The fading statistical properties of complex time series and the influence of the first order of statistics characteristics within threshold of the vibration are presented. Simulations show that the vibration of antenna has no obvious effect on first-order statistics properties, but it has great influence on second-order. Within the threshold, the influence on the statistical properties of first order is negligibly small. Considering accurate synchronization, it has little influence on the bit error rate of LMS system.

Key words: vibration of space-borne antenna, land mobile satellite channel, Corazza channel model, satellite elevation, maximum Doppler-shift frequency

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