WCDMA, CDMA2000 and TD-SCDMA are the scenarios on the third Generation mobile communications, some key techniques are consistent in these schemes.
CDMA2000和TD—SCDMA都已经成为了第三代移动通信的方案，而其中的一些关键技术基本一致。
The third generation mobile communications systems have the advantage of large capacity, low consumed power, fine voice quality and confidentiality.
第三代移动通信系统具有容量大，功耗低，通话质量高和保密性好等优点。
As voice communications is the primary media of communication for human being, it plays a very important role from public switched telephone network to the third generation mobile communications.
话音是人与人之间交流的主要方式，从最早出现公共交换电话网络到现在的第三代移动通信，语音通信是其最基本的功能。
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