论文部分内容阅读
移动通信作为通信领域的“新潮一族”,以其不受时空限制的独有魅力而风靡于世,应运而生的各种移动通信系统,不但在社会上越来越“火”,在军事通信领域亦倍受青睐。所谓移动通信,是指通信的一方或多方在运动中进行的信息交换。例如移动体与固定点之间,或移动体之间的通信等,均属于移动通信的范畴。一个典型的移动通信系统通常由基地台、用户台,控制终端设备以及中继线组成。每个基地台都有一个可靠通信的服务范围,称为无线区(或覆盖区)。无线区的大小由发射机功率和基地台天线的有效高度决定。多个无线区相互邻接排布就能扩大系统的服务面积。经过基地台,控制交换终端和中继转换传输信号,就能在整个服务区内实现任意两个移动用户之间的通
As a “trendsetter” in the field of communications, mobile communications are becoming more and more popular in the world due to their unique charm which is not restricted by space and time. The various mobile communication systems emerged not only in the society but also in the field of military communications Also much favored. The so-called mobile communications, refers to the communication of one or more parties in the movement of information exchange. For example, between a moving object and a fixed point, or between mobile objects, etc. belong to the category of mobile communications. A typical mobile communication system usually consists of base stations, subscriber stations, control terminals and trunks. Each base station has a reliable range of services, called wireless area (or coverage area). The size of the wireless zone is determined by the transmitter power and the effective height of the base station antenna. The arrangement of multiple wireless zones adjacent to each other can expand the service area of the system. After the base station, the control switching terminal and the relay to convert the transmission signal, you can in the entire service area to achieve any two mobile users through