wcdma技术(外文翻译).rar

WCDMA技术(外文翻译)

包含中文翻译和英文原文，内容详细完整，建议下载参考！

中文： 5200 字
英文： 17000字符


第三代移动通信系统（也称3G）是移动通信市场经历了第一代模拟技术的移动通信业务的引入，在第二代数字移动通信市场的蓬勃发展中被引入日程的。在当今Internet数据业务不断升温中，在固定接入速率（HDSL、ADSL、VDSL）不断提升的背景下，第三代移动通信系统也看到了市场的曙光，益发为电信运营商、通信设备制造商和普通用户所关注。
移动通信技术开始是各自发展的状态，各个国家、技术组织都不断发展自己的技术，美国有AMPS、D-AMPS、IS-136、IS-95，日本有PHS、PDC，欧洲则是GSM。这种格局一方面在移动通信发展的初期满足了用户的需求，开拓了移动通信市场，另一方面也人为造成地区间的隔离，引发了全球统一移动通信制式的需求。ITU正是在这个背景下于1985年启动了第三代移动通信系统的规范工作。
在第三代移动通信规范提案的概念评估过程中，宽带码分多址（WCDMA）技术以其自身的技术优势成为3G的主流技术之一。这里主要介绍WCDMA起源、面临的移动通信市场和业务状况、WCDMA技术特点、发展现状和演进方向 ......


The 3rd Generation Mobile Communication System (also known as 3G) mobile communications market has been affected by the first generation simulation technology of the mobile communication business introduction of the second generation digital mobile communications market boom has been put into the development agenda. In today's Internet data services continues to heat up, fixed access rate (HDSL, ADSL, VDSL) rising background, the third generation mobile communications system, the market saw the light. pickings for telecommunications operators, telecommunication equipment manufacturers and users of general concern. Mobile communication technologies is the development of their own state, every country and technical organizations have developed their own technology, American AMPS, GSM, IS-136, IS-95, Japan's PHS, PDC, Europe is GSM. While this pattern in the development of mobile communications initial meeting user demand and develop the mobile communications market, the other man-made regional isolation, sparking a global unified standard mobile communications needs. ITU It is in this context to the 1985 launch of the third generation mobile communication system to regulate the work. In the third generation mobile communications regulatory concept of the proposal evaluation process. Wideband Code Division Multiple Access (WCDMA) technology in their own 3G technology to become one of the mainstream technology. Here introduces WCDMA origin, the mobile communications market and business conditions, technical features WCDMA, Development status and direction of evolution.
WCDMA is the major incentive to the commercialized 3G services. Elaborately, in 2005, more than forty commercial WCDMA networks were released worldwide; accounting for about 80% or more of all 2005 released 3G networks. By December 2005, there had been 100 WCDMA networks released in 42 countries all over the world, which illustrates over two-thirds of WCDMA license holders have already released their own 3G business operations. Furthermore, it also reflects the maturity of this te Analysis of WCDMA network development ......