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什么是CDMACDMA是Code Division Multiple Access的缩写,被翻做码分多址。这是现代通信技术中用来实现信道共享的一种技术。所谓信道,可以是电磁信号的一个特定频率区域,称为频带;也可以是信号的一个特定时间片段,称为帧。所谓信道共享,就是将同一个信道供多个用户同时使用并保证互不干扰。信道共享可以提高信道资源的利用率。有许多不同的技术可以用来实现信道共享。把信道频带分割为若干更窄的互不相交的频带(称为子频带),把每个子频带分给一个用户专用(称为地址),这种技术被称为“频分多址”技术,英文是FDMA(Frequency DivisionMultiple Access/Address)。这是模拟载波通信、微波通信、卫星通信的基本技术,也是第一代模拟移动通信的基本技术。类似地,可以把信道
What is CDMACDMA is the abbreviation of Code Division Multiple Access, was turned into code division multiple access. This is a technique used to enable channel sharing in modern communication technologies. The so-called channel, electromagnetic signal can be a specific frequency region, known as the band; it can be a signal of a specific time segment, called the frame. The so-called channel sharing, is to use the same channel for multiple users at the same time and ensure non-interference. Channel sharing can improve the utilization of channel resources. There are many different techniques that can be used for channel sharing. Dividing the channel band into a number of narrower bands that do not intersect each other (called subbands) and assigning each subband to a single user (called an address) is known as “frequency division multiple access” Technology, English is FDMA (Frequency Division Multiple Access / Address). This is the basic technology of analog carrier communication, microwave communication and satellite communication. It is also the first generation of basic technology of analog mobile communication. Similarly, you can put the channel