基于Watterson模型的短波信道马氏性研究  

Research on Markov Characteristics for High Frequency Channel Based on Watterson Model

作　　者：陈奎[1] 段田东[1] 刘世刚[1] 徐文艳[1] 

机构地区：[1]解放军信息工程大学信息工程学院,郑州450002

出　　处：《计算机工程》2012年第20期17-20,25,共5页Computer Engineering

基　　金：国家"863"计划基金资助项目(2009AA011205)

摘　　要：在短波Watterson模型中,时变抽头增益为复随机过程,存在较难估计的问题。为此,通过研究信道的马氏性对其进行简化。将连续时变的信道增益离散化为有限状态值,建立一阶有限状态马尔可夫(FSM)模型,给出FSM模型的状态空间、平稳状态概率、状态转移概率等参数,研究FSM模型的状态平均错误概率、状态平均停留时间和状态停留时间的分布等特性。仿真结果验证了马尔可夫模型描述短波信道的准确性。A study of Markov characteristics for simplifying the model of high frequency channel is presented aiming at the problem of the randomly time-varying tap which is difficult to estimate. By partitioning the continuous-value channel gain into a finite mumber of states are modeled as a first-order Finite-state Markov（FSM） chain. The parameters of the FSM model such as stationary probability and transition probability are calculated with the given fading characteristic parameters. It analyzes the average error probability and the characteristics of state duration for the FSM model. The validity and accuracy of the model are confirmed by the simulation.

关 键 词：短波信道 WATTERSON模型 马尔可夫链 转移概率 状态停留时间 

分 类 号：TN911.7[电子电信—通信与信息系统]