| MIMO-HARQ系统中低反馈量序贯功率分配的传输方法 |
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| 引用本文： | 赵国栋,杨晨阳.MIMO-HARQ系统中低反馈量序贯功率分配的传输方法[J].电子与信息学报,2009,31(7):1548-1553. |
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| 作者姓名： | 赵国栋 杨晨阳 |
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| 作者单位： | 北京航空航天大学电子信息工程学院,北京,100191 |
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| 基金项目： | 国际科技合作项目(2008DFA12100)资助课题 |
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| 摘 要： | 混合自动重传请求(HARQ)是一种保证可靠通信的差错控制方式。通过采用空分复用MIMO技术和HARQ机制，可以进行高速可靠的通信。该文提出了一种MIMO-HARQ系统中以低反馈量进行序贯功率分配的传输方法，接收机根据当前的信道信息，搜索下次HARQ重传使用的最优天线间功率分配矢量，并将其序号反馈给发射机，序贯地实现码流间的功率分配。这种方法不仅需要的反馈量少，而且对反馈延迟的要求也很低。仿真分析表明，该方法可以显著提高系统在空间相关信道下的误码性能。
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| 关 键 词： | 无线通信 多天线 混合自动重传请求 功率分配 |
| 收稿时间： | 2008-7-7 |
| 修稿时间： | 2009-3-4 |
A Transmission Method for Sequential Power Allocation in MIMO-HARQ Systems |
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| Zhao Guo-dong,Yang Chen-yang.A Transmission Method for Sequential Power Allocation in MIMO-HARQ Systems[J].Journal of Electronics & Information Technology,2009,31(7):1548-1553. |
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| Authors: | Zhao Guo-dong Yang Chen-yang |
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| Affiliation: | School of Electronics and Information Engineering, Beihang University, Beijing 100191, China |
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| Abstract: | Hybrid Automatic Retransmission reQuest (HARQ) is an error control method for reliable communications. Combining HARQ with Multiple-Input-Multiple-Output (MIMO) systems using spatial multiplexing can provide reliable high data rate transmission. In this paper, a sequential power allocation method is proposed in MIMO-HARQ systems. Based on channel state information, the receiver searches the optimal power allocation vector and sends its index back to transmitter, with which the transmitter sequentially allocates powers for next retransmission. The proposed method needs less feedback information and can tolerate large feedback delay. Simulation results show that it can significantly improve the BER performance in spatial correlated MIMO channels. |
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| Keywords: | Wireless communication MIMO HARQ Power allocation |
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