前言150兆赫频段的调频移动无线电话系统、目前已广泛地应用于我国国民经济的各个领域。在水运交通部门,目前的运用方式大都是一个中心固定台与几十个甚至上百个移动台组成一个专用的无线电话生产调度网。中心台的调度人员在指定的频道上呼叫或应答移动台的现场生产人员,进行通话联络。但是,这样一种单一的通讯方式(移动台只能与中心固定台之间通话)、对于一个稍为复杂的生产调度指挥系统来 Foreword The frequency modulation mobile radiotelephone system in the frequency band of 150 MHz has been widely used in various fields of our national economy at present. In the water transport sector, the current mode of operation is mostly a center fixed station and dozens or even hundreds of mobile stations to form a dedicated wireless telephone production scheduling network. Central station dispatcher on the designated channel call or answer the mobile site’s production personnel, call contact. However, such a single means of communication (mobile station can only talk to the central fixed station), for a slightly more complex production scheduling command system