1.前言我国移动通信已有较长历史,1908年最初采用短波频段,开始了对船舶之间的公用无线电信,1923年又在神户港内开始了无线电话通信。其后,以15～450MHz 频段为主,发展了船舶公用电话、警察、消防、运输等移动无线通信。但各种移动通信、无线电广播等均分 1. Introduction China’s mobile communications have a long history. In 1908, shortwave frequency bands were initially used to start public wireless telecommunications between ships. In 1923, wireless telephone communications began in Kobe. Since then, the band 15 to 450MHz dominated, the development of the ship’s public telephone, police, fire, transport and other mobile wireless communications. However, all kinds of mobile communications, radio broadcasting and so on