一、引言本文根据1985年瑞士“雪琴”通信广州展览会技术讲座记录和资料整理而成,对解决移动无线通信中频谱有效利用问题,提供了一种新的技术。过去,移动无线通信的地区覆盖是通过地点分集和频率分集,即安装在不同地点的基台或转发台在不同频率下工作来实现的。最近几年,使用准同步方法提供同频地区覆盖和地点 I. INTRODUCTION This article is based on the records and data of technical seminars of the “Guinness” Communication Guangzhou Exhibition held in 1985 and provides a new technique for solving the problem of spectrum utilization in mobile wireless communications. In the past, the area coverage of mobile wireless communications was achieved through site diversity and frequency diversity, where base stations or repeaters installed in different locations operated at different frequencies. In recent years, co-synchronization methods have been used to provide co-frequency area coverage and locations