| 基于智能天线的分布式无线系统接入控制 |
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| 引用本文： | 杨波,唐友喜. 基于智能天线的分布式无线系统接入控制[J]. 系统工程与电子技术, 2009, 31(10): 2339-2342 |
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| 作者姓名： | 杨波 唐友喜 |
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| 作者单位： | 电子科技大学通信抗干扰技术国家重点实验室, 四川, 成都, 610054 |
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| 摘 要： | 针对采用自适应智能天线的分布式无线系统,从理论上分析了上行链路的负载因子,建立了基于该系统的干扰预测理论模型,并提出了两种基于干扰预测的上行链路接入控制算法.利用建立的干扰预测模型,可获得新用户给系统带来干扰的预测,从而可提高接入控制算法性能.仿真结果表明,基于干扰预测的接入控制算法在采用优化的接入控制门限时能够有效提高系统性能.当接入控制算法根据干扰的分布为用户灵活选择接入天线时,能够降低系统阻塞概率,但是却以牺牲系统中断性能为代价.
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| 关 键 词： | 接入控制 分布式无线系统 干扰预测 智能天线 |
| 收稿时间： | 2008-05-29 |
| 修稿时间： | 2009-06-09 |
Admission control for distributed wireless system based on smart antenna |
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| YANG Bo,TANG You-xi. Admission control for distributed wireless system based on smart antenna[J]. System Engineering and Electronics, 2009, 31(10): 2339-2342 |
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| Authors: | YANG Bo TANG You-xi |
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| Affiliation: | National Key Lab. of Communication, Univ. of Electronic Science & Technology of China, Chengdu 610054, China |
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| Abstract: | For a distributed wireless system employing adaptive smart antennas,the uplink load factor is analyzed theoretically.Then a theoretic interference estimation model is established and two admission control algorithms are proposed based on interference estimation.The proposed algorithms can use the model to obtain the interference estimation due to new users.The simulation results show these algorithms based on interference estimation can improve the system performance effectively if a proper noise rise threshold is set,and the algorithm can decrease the block probability at the expense of the outage performance. |
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