3G移动通信系统的无线网络优化(CDMA2000)

毕 业 论 文

题目：3G 移动通信系统的无线网络优化(CDMA2000)

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系 专 年 月 日

摘要

第三代移动通信系统的运营牌照已经在中国发放，针对3G系统无线网络优化技术的研究也日益呈现出紧迫性与重要性。

本文根据3G移动通信系统的技术标准，阐述了目前主流的三种3G系统—WCDMA系统、CDMA2000系统和TD一SCDMA系统的无线网络特性和空中接口的无线帧结构，并通过综合比较的方法分析了它们之间的异同:三种3G系统的基础技术都是码分多址CDMA技术，但系统特性及空中接口上有着各自的特点，特别是TD一SCDMA系统在采用了时分双工TDD技术的同时利用智能天线技术实现了空分多址SDMA技术，极大地提高了无线频谱利用率。同时指出这三种3G系统在中国的发展前景:WCDMA系统技术最成熟，商用最广泛;CDMA2000系统升级成本最低，升级速度最快:TD一SCDMA系统新技术最多，政策优势最多。

接着详细描述了移动通信系统无线网络优化的流程与方法。同时结合自身的实际工作，通过杭州电信富阳区CDMA2000系统无线网络优化工程的具体过程，指出了无线网络优化在移动通信系统日常维护工作中的重要性与系统性，并验证了优化工作对无线网络的性能改善。

最后，总结上述的研究、学习与工作，归纳出本课题的结论。

关键词：WCDMA CDMA2000 TD一SCDMA 无线网络优化

Abstract

The operating licence of the third generation mobile communication system has been issued in China,and the technology of the wireless network optimization

research for 3G system has been shown a growing urgency and importance.

According to the technical standard of the 3G mobile communication system，it elaborated three kind of mainstream 3G systems at present,WCDMA system，CDMA2000 system and TD-SCDMA system,and elaborated the characteristic of wireless network and the frame strueture of radio，and it gets the similarities and differences between them through analyzed by synthesis comparison: their foundation technology is the multiple access technology of the code division，but their system performance and the structure of radio has respective characteristic，Specially，TD-SCDMA system used duplex technology of time division and the smart antenna to realize multiple of space division，and it raised the frequency spectrum of the wireless. It points out the prospect of three kind of 3G system in China simultaneously:the technology of the WCDMA system is maturest，and its commercialization is the most widely spread; The upgrade cost of the CDMA2000 system is lowest，and its promotion speed is the quickest;The new technology and the superiority of policy of on TD-SCDMA system are most.

Then it described the flow and the method of the wireless network which optimize about the mobile communication system in detail. and it pointed out the importance and the systematic characteristic of the wireless network which optimizes in the mobile communication system ,through the project process of wireless network optimization HZCTFuyang’s CDMA2000 system，and it has confirmed the optimized work to the wireless network performance improvement.

Finally,it summarizes the above researeh,the study and the work,and induces the conclusion of this topic.

Keywords：WCDMA；CDMA2000；TD-SCDMA；Wireless Network Optimization