| TDD-CDMA系统干扰分布的研究 |
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| 引用本文： | 堵久辉,彭涛,李绍胜,王文博. TDD-CDMA系统干扰分布的研究[J]. 北京邮电大学学报, 2005, 28(6): 84-88 |
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| 作者姓名： | 堵久辉 彭涛 李绍胜 王文博 |
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| 作者单位： | 北京邮电大学,电信工程学院,北京,100876;北京邮电大学,电信工程学院,北京,100876;北京邮电大学,电信工程学院,北京,100876;北京邮电大学,电信工程学院,北京,100876 |
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| 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.
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| 关 键 词： | 移动通信 干扰分析 时分双工-码分多址 小区外干扰 |
| 文章编号： | 1007-5321（2005）06-0084-05 |
| 收稿时间： | 2004-11-20 |
| 修稿时间： | 2004-11-20 |
Investigation on Interference Distribution in TDD-CDMA Systems |
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| DU Jiu-hui,PENG Tao,LI Shao-sheng,WANG Wen-bo. Investigation on Interference Distribution in TDD-CDMA Systems[J]. Journal of Beijing University of Posts and Telecommunications, 2005, 28(6): 84-88 |
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| Authors: | DU Jiu-hui PENG Tao LI Shao-sheng WANG Wen-bo |
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| Affiliation: | School of Telecommunication Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China |
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| Abstract: | 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. |
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| Keywords: | mobile communication interference analysis time division duplex-code division multi access intra-cell interference |
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