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1.前言移动通信是以利用无线电波为前提的。在这一领域,可利用的频谱有限,因此必须要有效地加以利用,这就需要从频率、时间、空间这三个基本因素入手。为此目的,需在频率领域采用以窄带传输为代表的密集方式,在时间领域采用多路方式,空间领域则采用频率复用方式。时间领域的多路方式被称作多信道选取,它广泛地应用于各种移动通信系统。本文首先以最原始、最基本的移动通信——业余无线电通信为例,从基本概念上对
1. Introduction Mobile communication is based on the use of radio waves as a prerequisite. In this field, the available spectrum is limited and must be effectively used. This requires three basic factors: frequency, time and space. To this end, intensive approaches such as narrowband transmission are required in the frequency domain, multiple ways in the time domain, and frequency reuse in the space domain. The multi-channel approach in the time domain is called multi-channel selection and is widely used in various mobile communication systems. This article first of all the most primitive, the most basic mobile communication - amateur radio communications, for example, from the basic concept of