光纤、数字微波和卫星通信的技术经济比较

Comparison for Optical Fiber, Digital Microwave and Satellite Communication in Technology and Economy

传输设备在通信网中占有较大比重.不同的传输设备在技术上影响着通信网的传输质量,在经济上影响着通信网的成本.因此,选用何种传输设备是通信网设计中的一个重要课题.明线、对称电缆、同轴电缆和模拟微波等是多年来广泛应用的传输方式.但是,随着科学技术的发展,它们在技术上和经济上已不如光纤、数字微波和卫星等新的传输方式,已经或正在被淘汰,在今后若干年内,主要是继续利用的问题.本文着重对光纤、数字微波和卫星通信几种传输方式进行经济、技术比较.通过分析国内若干通信工程的成本,找出了它们在现阶段用于国内通信的最佳传输距离。

Transmission equipments are predominant parts in the communication networks. Different transmission equipment yields different transmission quality in technology and affects the costs of communication networks. Therefore, how to choose the transmission equipments is an important problem in communication network design. Open-wire lines, pair cables, coaxial cables and analogue microwave equipments are widely used as the transmission systems, but they have been or are being eliminated, even though some of them are still being used for many years in future. This paper mainly compared the optical fiber, digital microwave and satellite communication in technology and economy. Through the cost analysis of several domestic communication projects, the optimum transmission distance for those new systems used as domestic communications in current period has been found.