| VBLAST-MC-CDMA系统自适应调制仿真分析 |
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| 引用本文： | 吴作敏,杨维.VBLAST-MC-CDMA系统自适应调制仿真分析[J].系统仿真学报,2010,22(2). |
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| 作者姓名： | 吴作敏 杨维 |
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| 作者单位： | 北京交通大学轨道交通控制与安全国家重点实验室,北京,100044;东南大学移动通信国家重点实验室,南京,210096 |
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| 基金项目： | 国家自然科学基金(60572036,50534060); 国家“八六三”计划项目(2007AA01Z259); 东南大学移动通信国家重点实验室开放基金(W200816) |
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| 摘 要： | 提出一种应用卷积码编码的VBLAST-MC-CDMA系统上行链路结构,并将自适应调制技术应用于上行链路结构中。自适应调制门限的设定采用试验法。先设定需要的误码率门限,并以此为依据通过仿真结果确定系统调制方式的转换门限。通过仿真,分别讨论了用户数固定和用户数变化时该自适应调制系统的误码率性能。仿真结果表明,两种情况下自适应调制都能在不牺牲期望误码率性能的情况下提高系统的频谱效率。
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| 关 键 词： | 自适应调制 垂直空时分层 多载波CDMA 频谱效率 |
Simulation Analysis on Adaptive Modulation VBLAST-MC-CDMA Systems |
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| WU Zuo-min,YANG Wei.Simulation Analysis on Adaptive Modulation VBLAST-MC-CDMA Systems[J].Journal of System Simulation,2010,22(2). |
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| Authors: | WU Zuo-min YANG Wei |
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| Institution: | WU Zuo-min1,2,YANG Wei1,2 (1.State Key Laboratory of Rail Traffic Control , Safety,Beijing Jiaotong University,Beijing 100044,China,2.National Mobile Communications Research Laboratory,Southeast University,Nanjing 210096,China) |
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| Abstract: | An uplink structure of convolution coded VBLAST-MC-CDMA system was proposed.The adaptive modulation techniques were applied to the system.The thresholds of adaptive modulation were set by simulation.The expected bit error rate(BER) thresholds were settled first,and then according to the BER simulation results,the conversion thresholds of modulation types of the system were determined.The BER performance of the adaptive modulation VBLAST-MC-CDMA system for a given number of users and various number of users ... |
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| Keywords: | adaptive modulation vertical Bell Laboratories layered space-time(V-BLAST) multicarrier code division multiple access(MC-CDMA) spectrum efficiency |
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