摘要
本文简要回顾了TD-SCDMA物理层的帧结构,介绍了多频点的特性及多频点系统的同频组网方式,指出多频点系统并没有解决TD-SCDMA系统短扰码相关性能不佳的问题。分析扰码的互相关性,得出12个最大不相关组的结论,从理论上证明热点地区难以保证邻小区都选择互相关性最好的扰码,同时通过外场测试报告也证明了问题的存在。因此本文给出了一种基于路损的、利用多频点的频率参数分配信道的策略,从无线资源管理的角度缓解热点地区因扰码相关性问题引起的同频干扰,并给出了该方法经局部外场验证后的结果。
This article shortly introduces the physical character of TD-SCDMA and muhi-frequency system, points out the scrambling codes is not changed in multi-frequency cellular. Analyzing the 128 scrambling codes, find out that only 12 no inter-correlation groups, prove that scrambling codes is not enough for hot area cells to avoid interference, this is happened in real field network. A method is given in this article, which utilizes muhi-frequency character to allocate channel for UE based on path loss, can avoid such a problem happening. At last, field test performance is improved as a result.
出处
《电信科学》
北大核心
2007年第12期59-62,共4页
Telecommunications Science
关键词
TD-SCDMA
多频点系统
扰码分析
基于路损的多频点信道分配策略
TD-SCDMA, multi-frequency cellular system, main frequency, secondary frequency, radio channel allocationstrategy based on path loss
