基于Markov链的LEO卫星移动信道动态仿真模型  

Dynamic Simulation Model of LEO Satellite Mobile Communication Channel Based on Markov Chain

作　　者：张久锋[1] 吴久银[2] 

机构地区：[1]解放军理工大学通信工程学院研究生 2队 [2]解放军理工大学通信工程学院无线通信系

出　　处：《军事通信技术》2004年第4期39-43,共5页Journal of Military Communications Technology

摘　　要：信道特性仿真是系统设计的重要组成部分,对信道估计、切换算法和功率控制等方面的分析与建模有重要意义。文中分析了LEO卫星移动信道的特点,研究了在不同的传播环境下信号经过卫星移动信道的统计特性,给出了能够反映LEO卫星移动信道实时特性的动态仿真模型。对经过该模型后信号的幅度特性和基于π/4DQPSK调制信号误码率特性进行仿真,仿真结果与实测数据相符,说明该模型能够反映信道的传播特性,可以用于LEO移动卫星通信系统的设计和研究。The simulation of channel character is the most important part of system design, which has impact on the analysis and modeling for channel evaluation, handover arithmetic and power control etc. This paper analyzes the characteristics of LEO satellite mobile communication channel, and the signal statistical characters have been studied in different receiving conditions. The real time simulation model of LEO satellite mobile channel is presented. With the model the simulations is made for the signal amplitude character and the basic modulated signal π/4 DQPSK. The simulation results show that the model is effective.

关 键 词：卫星移动信道 MARKOV链 衰落 

分 类 号：TN927[电子电信—通信与信息系统]