| 摘要: |
| 为了解决下行三维(3D)多用户(Multi-User，MU)多输入多输出(MIMO)系统中的共信道干扰问题，提出了一种基于Khatri-Rao积的3D预编码方法。该方法首先产生离线码本，然后各用户分别选择与水平维和垂直维信道最匹配的的码字并将其反馈给基站端，最后，根据提出的Khatri-Rao积基站端构造3D预编码矩阵，对不同用户数据进行处理。理论分析和仿真结果表明，该方法可有效地匹配真实信道状态信息(CSI)，而且可有效地抑制共信道干扰，提升系统误码性能，对系统的性能优化有一定的参考价值。 |
| 关键词: 多用户MIMO 3D信道模型 预编码矩阵 有限反馈 Khatri-Rao积 |
| DOI： |
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| 基金项目:国家科技重大专项(2013ZX03003008-005) |
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| 3D MU-MIMO precoding method based on Khatri-Rao product |
| WU Xue-wen,JING Xiao-rong,LIU Li |
| () |
| Abstract: |
| In order to solve the problem of co-channel interference(CCI) in downlink 3D(Three Dimension) MU-MIMO(Multi-user Multiple Input Multiple Output)system,a precoding method based on Khatri-Rao product is proposed. Firstly,outline codebook is designed,and then the user selects the best horizontal dimension precoding codeword and vertical dimension precoding codeword respectively,and feeds back to the base station,finally base station constructs 3D precoding matrix according to the proposed Khatri-Rao product and processes different users’ data. Both theoretical analysis and simulations indicate that the proposed method can not only match the authentic channel state information(CSI) but also effectively suppress the co-channel interference and improve system bit error rate(BER) performance.The research in this paper has a certain reference value for the system optimization. |
| Key words: MU-MIMO 3D channel model precoding matrix limited feedback Khatri-Rao product |
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