签名 年月日 本表作评定学生平时成绩的依据之一。 摘要 本文全面系统地介绍了第三代移动通信的基本理论和系统原理,通信系统的发展历程,以及国内外第三代移动通信的发展现状。主要介绍了移动通信领域中的各种技术,其中包括目前相对成熟的移动通信技术,同时也包括现在新开发应用的技术,还介绍了在探讨中的未来移动通信技术。阐述了已提交ITU的十种第三代移动通信IMT-2000空中接口提案的主要技术特点,及三种主流提案TD-SCDMA,WCDMA和CDMA2000的主要区别;分析了第三代移动通信的国际应用状况与发展趋势;描述了第三代移动通信的主要技术特征及未来可能的网络过渡形式;对第三代移动通信系统所可能涉及的主要核心技术进行了展望。。 关键词系统原理趋势核心技术第三代移动通信 Abstract prehensive and systematic introduction to the third generation munication system, the basic theory and principle of the development process munication systems, and domestic development of third generation munication status. Introduces the field of munications in a variety of techniques, including the current munications technology is relatively mature, but also include the development and application of new technologies is also introduced to explore the future of munication the ten that have been submitted to ITU third generation munications IMT-2000 air interface, the main technical features of the proposal, and three major proposals TD-SCDMA, WCDMA and CDMA2000, the main difference;Analysis of the third generation munication status and trends of the international application; describes the third generation munication and the main technical characteristics of work transition in the form of possible future,The third gener