美军MUOS系统通信链路无线信道特性分析

Analysis of Wireless Channel Characteristics of Communication Link in US Army MUOS System

针对美军移动用户目标系统(mobile user objective system,MUOS)卫星通信无线信道传输特性分析问题,运用统计模型分析策略对其进行研究。在分析美军MUOS系统(移动用户目标系统)的UHF频段(ultra high frequency band)和Ka频段(K-above band)2种通信链无线信道传播损耗、多径衰落特性等的基础上,研究MUOS系统2种通信链路无线信道传播特性。分析结果表明:UHF频段无线信道具有复杂的时变衰落特性,其传播特性受移动终端所处的物理环境、场景影响较大;Ka波段与UHF频段相比干扰较小,其传播特性主要受到大气效应的影响,其中雨衰影响最为显著。该研究可为后续开展该系统链路干扰技术研究提供参考。

For the problem of analysis of transmission characteristics of satellite communication wireless channel for military mobile user objective system, this paper uses statistical model analysis method to study it. Based on the research of the UHF frequency band and the Ka frequency band communication links of MUOS system, the propagation characteristics of the channel propagation loss and multipath fading are analyzed. It shows that the UHF band wireless channel is a complex time-varying feature. Its propagation characteristics are greatly affected by the physical environment and scene of the mobile terminal. Ka band compared with the UHF band, its propagation characteristics are mainly affected by the atmospheric effects, and the rain attenuation effect is the most significant, these characteristics have an important influence on the transmission capacity of MUOS system.