第三代移动通信技术分析

Analysis of Third Generation Mobile Communication Technology

移动通信的发展由第一代模拟调频(FM)和频分多址(FDMA)为主要特征的移动通信系统,经过以时分多址(TDMA)和码分多址(CDMA)为特征的第二代移动通信系统及以GPRS和CDMA2000-1X为代表的第二代半通信系统,进而发展到以CDMA为主流技术的第三代移动通信系统。CDMA主要包括3种:W-CDMA、CDMA2000和TD-SCDMA。本文对这三种技术的特点作了分析和比较,并探讨了适合国情的自主产权的TD-SCDMA系统。

The development of mobile communications by the first generation Analog Modulation（FM） and frequency division multiple access（FDMA） as the main feature of the mobile communication system,through the time division multiple access（TDMA） and Code Division Multiple Access（CDMA） is characterized by the second generation mobile communication system and to GPRS and CDMA2000-1X represented the second generation of semi-communication systems,the development of technology to the mainstream with CDMA third-generation mobile communication systems.CDMA includes three kinds ： W-CDMA,CDMA2000 and TD-SCDMA.This characteristic of these three techniques were analyzed and compared,and discussed the conditions for proprietary TD-SCDMA system.