摘要作为一种国家关键的基础通信设施，以及全球移动通信的有机组成部分,卫星移动通信系统在国家安全、紧急救援、互联网、远程教学、卫星电视广播以及个人移动通信等方面得到了广泛的应用.新一代宽带卫星通信系统可以提供个人电信业务、多信道广播、互联网的远程传送，是全球无缝个人通信、互联网空中高速通道的必要手段。近年来卫星通信新技术不断进展，特别是低轨道卫星移动通信系统受到了人们的广泛关注,其讨论与应用已成为各国的战略进展重点。无线资源管理是低轨卫星移动通信系统讨论中的一项重要内容,这主要是由于卫星系统的资源是非常昂贵的，因此如何合理而有效地管理并利用卫星系统的资源已成为关键。通过对低轨道卫星无线通信信道的基本特点的讨论，文章具体从无线信道的缺点进行分析，并进行了 matlab 仿真模拟，得出信号经过多径信道的幅频特性，多径信道对不同频率信号的衰减情况不同,即具有频率选择性，以及信号经过多径信道的衰减情况，以及码元间隔对传输信号的影响,信号的码元间隔必须远大于信号的时延差，才能尽量的减小码间干扰。关键词:低轨卫星通信,信道,信道特性AbstractAs a national key infrastructure communication, as well as an organic part of the global mobile communications, Star mobile communication system in national security ， emergency rescue ， Internet， satellite TV broadcasting, remote teaching and personal mobile communication has been widely used in such aspects. A new generation of broadband satellite communication system can provide personal telecommunication business, multicasting, remote transmission, the Internet is a global seamless personal communications， high-speed Internet air passage means necessary。 Satellite communication technology development in recent years, especially in low orbit satellite mobile communication system has received the widespread attention, its research and application has become a national strategic priorities 。 Wireless resource management is the study of Leo satellite mobile communication system is an important content， this is mainly due to ...
