天线指向不精确时LMS信道模型  

Land Mobile Satellite Channel Model for Antenna Pointing Inaccuracy

作　　者：廖希[1] 刘乃金[2] 钱晋希 赵旦峰[1] 王杨[1] 

机构地区：[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

出　　处：《北京邮电大学学报》2014年第2期99-103,共5页Journal of Beijing University of Posts and Telecommunications

基　　金：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)

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.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.

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 

分 类 号：TN927[电子电信—通信与信息系统]