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一、引言为了改变目前民航平面通信落后的状况,适应高速发展的民航事业对通信的要求,民航决定建设以卫星通信信道为主,其他通信手段(有线和短波通信)为辅的卫星平面专用通信网,这一系统工程目前在实施的进程中。民航卫星平面专用通信网(以下简称卫星通信网)建成后将担负起民航系统内各种业务电话、自动转报和其他数据传输业务。网络使用SCPCDAMA(每载波单路,按需分配)体制的话音系统;在话音内通信系统内安
I. INTRODUCTION In order to change the current backward state of civil aviation plane communications and meet the requirements of the rapid development of civil aviation for communications, CAAC has decided to establish a satellite-plane private communication supplemented by satellite communication channels and supplemented by other means of communication (wired and shortwave communication) Network, the system engineering is currently in the process of implementation. After the completion of the Civil Aviation Satellite Plane Communication Network (hereinafter referred to as the satellite communication network), it will assume various business calls, automatic reporting and other data transmission services in the civil aviation system. Network using SCPCDAMA (per carrier, single-channel, on-demand distribution) system voice system; within the voice communication system