| 不完美反馈自适应多天线跨层系统的性能分析 |
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| 引用本文： | 郭丽丽,岳殿武,王瑞春,何国荣.不完美反馈自适应多天线跨层系统的性能分析[J].电波科学学报,2012(2):389-395. |
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| 作者姓名： | 郭丽丽 岳殿武 王瑞春 何国荣 |
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| 作者单位： | 深圳信息职业技术学院电子与通信学院;大连海事大学信息科学技术学院 |
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| 基金项目： | 国家自然科学基金(60672030);东南大学移动通信国家重点实验室开放研究基金(W200810);高等学校博士学科点专项科研基金(20092125110006);广东省自然基金(10451802904006030);深圳信息职业技术学院自然科学基金项目(YB201009);深圳信息职业技术学院自然科学基金项目(YB201010)资助项目;广东省产学研结合引导项目“通讯系统射频特性补偿器件”(编号:2011B090400233);创新团队“现代家居能源端口智能控制节能管理系统的研究与实现”(CXTD2-003) |
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| 摘 要： | 为提高网络无线通信的频谱利用率,提出一种自适应闭环多输入多输出(MIMO)跨层设计方案。该方案是融合物理层的自适应调制技术(AM)和数据链路层的自动重传技术(ARQ);发射端利用反馈信息,自适应选择调制模式和发射权矢量,并自动重传数据,形成三重反馈的闭环MIMO跨层系统。推导了不完美反馈下的系统频谱效率和中断概率闭合表达式,分析了时延对跨层系统性能的影响。仿真结果表明:对比单发/单收(SISO)跨层系统以及开环MIMO跨层系统,自适应闭环MIMO跨层系统的性能有明显提高。
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| 关 键 词： | 跨层设计 自适应调制 自动重传 最大比合并 MIMO |
Performance analysis of adaptive multi-antenna cross-layer scheme based on imperfect feedback |
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| GUO Li-li,YUE Dian-wu,WANG Rui-chun,HE Guo-rong.Performance analysis of adaptive multi-antenna cross-layer scheme based on imperfect feedback[J].Chinese Journal of Radio Science,2012(2):389-395. |
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| Authors: | GUO Li-li YUE Dian-wu WANG Rui-chun HE Guo-rong |
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| Institution: | 1 (1.College of Electronics and Communication,Shenzhen Institute of Information Technology,Shenzhen Guangdong 518029,China; 2.College of Information Science and Technology, Dalian Maritime University,Dalian Liaoning 116026,China) |
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| Abstract: | Adaptive closed-loop multipleinput multiple output(MIMO) cross-layer scheme is proposed to improve wireless communication network spectral efficiency.The scheme is scheduled through combining adaptive modulation(AM) at physical layer with automatic repeat request protocol(ARQ) at data link layer.By utilizing feedback information,the transmitter updates the modulation mode adaptively,chooses optimal transmitter beam-steering vector and retransmitted data automatically,to form the three-feedback.The paper presents close-form expressions of the spectral efficiencies and the probability of outage under imperfect feedback,and analyzs the effects of delayed feedback on the system performance gains.The simulation results show that compared to single input single output(SISO)cross-layersystem and open-loop MIMO cross-layer system,the performance of the adaptiveclosed-loop MIMO cross-layer system is observably enhanced. |
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| Keywords: | cross-layer design adaptive modulation(AM) automatic repeat re-quest(ARQ) MIMO |
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