| 基于有限反馈的MIMO系统自适应调制 |
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| 引用本文： | 刘毅, 张海林. 基于有限反馈的MIMO系统自适应调制[J]. 电子与信息学报, 2007, 29(11): 2628-2631. doi: 10.3724/SP.J.1146.2006.00659 |
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| 作者姓名： | 刘毅 张海林 |
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| 作者单位： | 西安电子科技大学ISN国家重点实验室,西安,710071;西安电子科技大学ISN国家重点实验室,西安,710071 |
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| 摘 要： | 该文利用信道的特征矢量，将MIMO高斯信道转化成混合信道，结合功率分配给出了自适应调制方案，使系统容量在发射功率和服务质量约束下达到最大。发射端所需的波束成形和功率分配等信息利用有限的比特反馈到发射端。仿真结果表明：在小信噪比的情况下，该自适应调制方案对系统容量有明显改善。
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| 关 键 词： | 自适应调制 有限反馈 功率分配 多输入多输出 |
| 文章编号： | 1009-5896（2007）11-2628-04 |
| 收稿时间： | 2006-05-15 |
| 修稿时间： | 2006-05-15 |
Adaptive Modulation for MIMO System Based on Limited Feedback |
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| Liu Yi, Zhang Hai-lin. Adaptive Modulation for MIMO System Based on Limited Feedback[J]. Journal of Electronics & Information Technology, 2007, 29(11): 2628-2631. doi: 10.3724/SP.J.1146.2006.00659 |
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| Authors: | Liu Yi Zhang Hai-lin |
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| Affiliation: | State Key Laboratory of ISN, Xidian University, Xi’an 710071, China |
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| Abstract: | The MIMO channel is changed into the mixture channel using the eigenvector of the channel matrix. The adaptive modulation together with power allocation is studied in order to maximize the system capacity under the constraint of total transmit power and Quality of Service(QoS) . The information needed at the transmitter such as beamforming vector and power allocation vector is conveyed back using limited feedback. The simulation results show that the proposed scheme can improve the capacity greatly at low SNR. |
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| Keywords: | Adaptive modulation Limited feedback Power allocation MIMO |
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