多载波TDD-CDMA系统下行业务容量研究  

Downlink Traffic Capacity of Multi-Carrier TDD-CDMA Systems

作　　者：陈书平[1] 武欣[1] 赵冬[1] 彭木根[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：《吉林大学学报（信息科学版）》2008年第1期31-37,共7页Journal of Jilin University（Information Science Edition）

基　　金：国家重点基础研究发展973计划基金(2007CB310602)

摘　　要：针对目前缺乏可靠的多载波时分双工-码分多址(TDD-CDMA:Time Division Duplex-Code Division Multi- ple Access)系统下行容量模型的问题,在理论分析多载波TDD-CDMA系统干扰特征,建立了载波间干扰因子等模型的基础上,得出了系统下行极限容量表达式。理论模型表明,多载波TDD-CDMA系统下行容量不仅与采用的载波数、小区内外干扰比以及业务类型等相关,还与载波间干扰大小密切相关。仿真结果表明,理论模型完全正确,采用该模型评估系统下行链路容量完全可行。Traditional capacity model of single carrier TDD-CDMA （Time Division Duplex-Code Division Multiple Access） is not suitable for multi-carrier systems. Downlink capacity of multi-carrier TDD-CDMA systems was investigated theoretically and inter-carrier interference factor model was established. A novel expression to determinate the downlink capacity of multi-carrier TDD-CDMA systems was deduced, which shows that the capacity is closely related to the inter-to-intra cell interference ratio, traffic types and the inter-carrier interference factor. Simulation was done to evaluate the theoretical model. And a good concordance was observed. Simulation results show that it is feasible to evaluate the downlink capacity of multi-carrier TDD-CDMA systems using the model.

关 键 词：移动通信 时分双工-码分多址 多载波 下行容量 

分 类 号：TN929.5[电子电信—通信与信息系统]