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分布式天线系统中的下行容量分析 被引量:1

Downlink capacity analysis in distributed antenna systems
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摘要 针对分布式天线系统(DAS)的下行容量问题展开研究。首先建立了包含路径损耗、阴影衰落和瑞利衰落的复合信道模型;然后,基于该信道模型,分别对各态历经容量和中断容量进行了分析。考虑到小区内移动台的分布特点,在选择分集传输策略下,推导了各态历经容量和中断容量的近似解析表达式。仿真结果表明,所推导的2个近似解析表达式均能准确地评估分布式天线系统的系统性能。 The downlink capacity was analyzed in distributed antenna systems(DAS).Firstly,a composite channel model was established,which took path loss,lognormal shadowing and Rayleigh fading into account.Then,based on the channel model,both the ergodic capacity and outage capacity were analyzed.After that,considering the distribution of mobile stations(MS) in the system,the approximate analytical expressions of the ergodic capacity and outage capacity were derived by making use of selective diversity(SD) transmission scheme for distributed antennas.Numerical results show that both the two approximate analytical expressions can provide sufficient precision for evaluating the system performance of DAS.
出处 《通信学报》 EI CSCD 北大核心 2012年第6期125-132,共8页 Journal on Communications
基金 国家重点基础研究发展计划(“973”计划)基金资助项目(2010CB328000) 国家自然科学基金资助项目(61102068,61073168,60972023) 国家科技重大专项基金资助项目(2010ZX03003-002,2010ZX03003-004) 中国博士后科学基金资助项目(20110490389) 高等学校博士学科点专项科研基金资助项目(20113218120017) 东南大学移动通信国家重点实验室开放研究基金资助项目(2010D01) 西安电子科技大学综合业务网理论及关键技术国家重点实验室开放研究基金资助项目(ISN12-11) 南京航空航天大学基本科研业务费专项基金资助项目(NS2011013)~~
关键词 分布式天线系统 各态历经容量 中断容量 选择分集 复合信道 distributed antenna systems ergodic capacity outage capacity selective diversity composite channel
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参考文献16

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