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进入信息时代的今天,移动通信发展异常迅速,通信质量进一步提高,其中最令人关注的就是现代移动通信的新星CDMA系统。传统的无线电通信是建立在点对点通信基础上的,而现代移动通信要求实现多址通信方式,任意两个无线移动用户可占用任一指定射频信道,进行相互通信,而不会互相干扰。为使信号仅在要求通信的两个用户之间传输,而不影响其它用户,就必须选用适当的多址通信方式。基本的多址方式有三种,即频分多址FDMA、时分多址
Into the information age today, the rapid development of mobile communications, further improve the quality of communications, the most concern is the modern mobile communications Nova CDMA system. Traditional radio communication is based on point-to-point communication, while modern mobile communication requires multiple access communication. Any two wireless mobile users can occupy any designated radio frequency channel to communicate with each other without interfering with each other. In order for the signal to be transmitted only between two users requiring communication without affecting other users, appropriate multiple access communication must be used. There are three basic types of multiple access, namely, Frequency Division Multiple Access FDMA, Time Division Multiple Access