等待接收再入遥测信道的近地衰落模型

基于靶场的地形特征、地面接收站的布置特点、等待接收天线以及发射天线的配置情况,提出了等待接收遥测信道的近地衰落模型,它是一个赖斯过程和一指数过程的乘积过程.然后,对信道的统计特性进行了分析,得到了信道的幅度概率密度函数、电平通过率和平均衰落间隔的闲式表达式,并通过仿真曲线分析了信道参数对信道特性的影响.最后,基于真实信道测量数据,给出了一种信道参数的估计方法.

Near-to-ground fading model for reentry telemetry channel in wait-receiving system

Based on the terrain character of shooting range and location of the ground-receiving station and configuration of the wait-receiving antenna and transmitting antenna, the near-to-ground fading model for reentry telemetry channel is presented in this paper. The model is a product of a Rice process and a lognormal process. The statistics characteristic of the channel is analyzed, and the closed expressions of the amplitude-probability density function and the level-crossing rate and average duration of fades are obtained. By using the simulated curves, the effection of the channel parameters on the channel characteristic is discussed. Finally, an estimating method of channel parameters is proposed by employing the measured data of real-world channel.