TDD-CDMA系统干扰分布的研究  

Investigation on Interference Distribution in TDD-CDMA Systems

作　　者：堵久辉[1] 彭涛[1] 李绍胜[1] 王文博[1] 

机构地区：[1]北京邮电大学电信工程学院,北京100876

出　　处：《北京邮电大学学报》2005年第6期84-88,共5页Journal of Beijing University of Posts and Telecommunications

基　　金：国家"863计划"项目(2004AA123160)

摘　　要：为分析时分双工-码分多址(TDD-CDMA)系统内干扰分布特性,理论分析了TDD与频分双工(FDD)系统在干扰分布上具有的本质差异,并结合TDD-CDMA系统普遍采用的智能天线技术,推导了小区外与小区内干扰因子.以时分-同步码分多址(TD-SCDMA)为例,通过动态系统级仿真平台对不同天线模型下TDD-CDMA系统干扰分布特性进行了仿真研究.仿真结果表明,采用扇区天线和智能天线可有效降低小区外与小区内干扰因子;慢速动态信道分配算法对小区外干扰具有一定的抑制效果.In order to investigate the interference distribution in time division duplex-code division multiple access （TDD-CDMA） system, the difference of interference distribution between TDD CDMA and frequency division duplex （FDD） CDMA systems was investigated. By introducing smart antennas, the inter-to-intra-cell interference ratio in CDMA systems was deduced. And taking TD-SCDMA as an example, static and dynamic system-level simulator was established to validate the conclusion of theoretical analysis. Simulation results show that sector antenna and smart antennas can reduce the inter- to-intra-cell interference ratio effectively and slow dynamic channel allocation scheme is also able to weaken the inter cell interference in TDD-CDMA systems.

关 键 词：移动通信 干扰分析 时分双工-码分多址 小区外干扰 

分 类 号：TN929.5[电子电信—通信与信息系统]