论文部分内容阅读
北京地区公众无线移动电话网已建成并通过邮电部验收。正式开通使用。蜂窝结构无线移动电话系统是国际上具有八十年代最先进的通信手段。它具有容量大、信噪比好、差错保护有效、信息传递速度高、不受场地、时间的限制,可灵便自由地交换信息等特点。北京地区公众移动电话系统安装了最大接口容量960线的程控交换机,分装在国际饭店、昌平等5个基地台,采用载波、特高频等先进手段,组成一个以无线为传输手段的公
Public wireless mobile phone network in Beijing has been completed and accepted by the Ministry of Posts and Telecommunications. Officially opened to use. Cellular cellular wireless mobile phone system is the most advanced communication means in the 1980s. It has a large capacity, good signal to noise ratio, error protection and effective, high speed information transmission, free from the venue, time constraints, flexibility and freedom to exchange information and so on. Beijing public mobile phone system installed the largest interface capacity of 960 lines of program-controlled switches, sub-installed in the International Hotel, Chang-ping 5 base stations, the carrier, UHF and other advanced means to form a wireless transmission means public