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本文分析了有关小型终端网络技术和制约因素。该VSAT网络是卫星通信领域内最近创新的一种特殊类型的宽覆盖范围稀路由卫星网络。本文研究了适用于数据及话音通信的VSAT网络体系结构,分析了与工作频率(即:C波段与Ku波段)有关的若干问题及非扩频和扩频技术间协调。还详细地研究了调制和多路通信方案。给出了以图解说明的各种类型VSAT网络性能的线路设计实例。
This article analyzes the small terminal network technologies and constraints. The VSAT network is a special type of wide-area, much-routed satellite network that has recently been innovated in the field of satellite communications. This paper studies the VSAT network architecture for data and voice communications and analyzes several issues related to the operating frequency (ie C-band and Ku-band) and the coordination between non-spreading and spreading techniques. The modulation and multiplexing schemes are also studied in detail. An illustration of the line design for the various types of VSAT network performance is given.