平流层通信平台分集的经验模型

An Empirical Model of Platform Diversity for Stratospheric Communications

通过模拟雨区的三维结构,利用几何方法获得平流层通信平台分集增益数据,建立了平流层通信平台分集的经验模型,用实验数据检验模型得到的均方根误差为1.96 dB。建立的模型表明,平台间距离和平台间连线方位角是影响平流层通信站分集性能的主要因素,而工作频率和路径仰角对分集性能只有微弱的影响。给出的方法和参数有利于平流层通信平台分集系统的优化设计。

An empirical model of platform diversity for stratospheric communications is proposed with diversity gain data for stratospheric communications that are obtained by simulating 3-dimensional spatial structures of rain cells using geometry method. The resulting model reproduces the entire experimental data with an rms error of 1.96 dB. The presented model shows that both of the distance between sites and baseline orientation dominate the dependence of the diversity gain,while the dependence on the link frequency and the elevation angle of the single path is small. The presented method and parameters are valuable for the optimal design of the platform diversity system.