| 一种自适应调制方案 |
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| 引用本文： | 李艳峰,赵旦峰,李欣.一种自适应调制方案[J].太赫兹科学与电子信息学报,2006,4(1):45-48. |
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| 作者姓名： | 李艳峰 赵旦峰 李欣 |
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| 作者单位： | 哈尔滨工程大学,信息与通信工程学院,黑龙江,哈尔滨,150001 |
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| 摘 要： | 阐述一种星座图可调的自适应调制方案，并在Beyond ITM-2000的相关参数下进行了性能仿真。该方案能克服移动无线信道时变衰落特性对传输性能的影响，在信道的传输质量满足一定误码率要求的前提下，根据无线信道衰落情况，使调制方式在四相移相键控调制（Quaternary Phase Shift Keying，QPSK）、正交幅度调制（Quadrature Amplitude Modulation，QAM）包括8QAM，16QAM，32QAM，64QAM，128QAM，256QAM之间自如切换。仿真结果表明，该系统方案可以有效地适应无线信道的时变衰落，不但能增加系统平均吞吐量，而且能提高频谱利用率。
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| 关 键 词： | 通信技术 自适应调制方案 吞吐量 无线信道 多进制正交幅度调制 |
| 文章编号： | 1672-2892（2006）01-0045-04 |
| 收稿时间： | 2005-07-18 |
| 修稿时间： | 2005-08-29 |
A Scheme of Adaptive Modulation |
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| LI Yan-feng,ZHAO Dan-feng,LI Xin.A Scheme of Adaptive Modulation[J].Journal of Terahertz Science and Electronic Information Technology,2006,4(1):45-48. |
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| Authors: | LI Yan-feng ZHAO Dan-feng LI Xin |
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| Affiliation: | College oflnformation and Communication Engineering, Harbin Engineering University, Harbin 150001, China |
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| Abstract: | In this paper,an adaptive modulation scheme applied in beyond 3G system is discussed,whose planisphere used is adjustable.Simulation was done to the proposed scheme using correlative parameters of beyond 3G system.It can overcome the influences of the time-variant fading wireless channel to transmission properties,and when transmission quality satisfies the requirements of certain bit error rate,modulation systems as QPSK,3QAM,16QAM,32QAM,64QAM,128QAM and 256QAM can switch freely according to fading state of the wireless channel.Simulation shows the proposed scheme can be adaptive to the time-variant fading wireless channel efficiently and increase both the average throughput of system and the frequency effiency. |
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| Keywords: | BeyondITM-2000 |
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