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河北工业大学电子信息工程学院,天津 300401
[ "刘剑飞(1968- ),男,河北献县人,博士,河北工业大学教授,主要研究方向为无线通信与光通信技术及其信号处理。" ]
[ "何利平(1992- ),女,河北廊坊人,河北工业大学硕士生,主要研究方向为面向 5G的大规模MIMO预编码技术。" ]
[ "陶颖(1991- ),女,河北承德人,河北工业大学硕士生,主要研究方向为面向5G的大规模MIMO预编码技术。" ]
[ "刘迪(1997- ),女,天津人,主要研究方向为5G网络中的预编码技术。" ]
[ "曾祥烨(1979- ),男,河北邢台人,博士,河北工业大学副教授,主要研究方向为光纤通信与无线通信系统。" ]
[ "王蒙军(1978- ),男,河北清苑人,博士,河北工业大学副教授,主要研究方向为电磁兼容与信号处理。" ]
网络出版日期:2019-01,
纸质出版日期:2019-01-25
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刘剑飞, 何利平, 陶颖, 等. 大规模MIMO系统中低复杂度的码本搜索方法[J]. 通信学报, 2019,40(1):79-86.
Jianfei LIU, Liping HE, Ying TAO, et al. Low complexity codebook search method in massive MIMO system[J]. Journal on communications, 2019, 40(1): 79-86.
刘剑飞, 何利平, 陶颖, 等. 大规模MIMO系统中低复杂度的码本搜索方法[J]. 通信学报, 2019,40(1):79-86. DOI: 10.11959/j.issn.1000-436x.2019009.
Jianfei LIU, Liping HE, Ying TAO, et al. Low complexity codebook search method in massive MIMO system[J]. Journal on communications, 2019, 40(1): 79-86. DOI: 10.11959/j.issn.1000-436x.2019009.
大规模MIMO系统中的预编码技术是5G网络中的关键技术之一。针对大规模MIMO通信系统中旋转离散傅里叶变换(DFT)码本的用户端码字搜索问题,提出了一种低复杂度的码本搜索方法。该方法根据旋转DFT码本相同列的弦距离最小,且弦距离越小的预编码向量其相关性越强的特点,将所有水平维码本和垂直维码本分别进行分组,得到信道增益最大的水平维最优码字和垂直维最优码字,以构成3D 预编码码本。仿真结果表明所提出的搜索方法在保证了系统性能的同时显著降低了搜索复杂度,并且随着天线数目的增加优势更加明显。
In Massive MIMO systems for 5G networks
precoding technology is one of the key technologies.Aiming at user side codebook search method of the discrete Fourier transform (DFT) rotation codebook
a low complexity search algorithm was proposed.In this algorithm
all horizontal and vertical codebooks were grouped separately according to the characteristics that the precoding vectors with the same column of DFT rotation codebooks had the smallest chordal distance and the smaller chordal distance have the stronger correlation
and then the optimal horizontal and vertical codewords with maximum channel gain were obtained to form 3D precoding code-books.The simulation results indicate that the searching complexity of the proposed method is significantly reduced under conditions of insuring the system performance
moreover
this advantage becomes greater with the number of antennas increasing.
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