A Hybrid Precoding Design Method in Millimeter Wave Massive MIMO System
A design method and precoding technology, applied in transmission systems, radio transmission systems, diversity/multi-antenna systems, etc., can solve the problems of low system spectral efficiency and bit error rate performance, high computational complexity, and ensure computational complexity. , good system performance, improved spectral efficiency and bit error rate performance
Active Publication Date: 2022-05-10
JIANGNAN UNIV +1
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[0005] In order to solve the problem of low system spectral efficiency and bit error rate performance and high computational complexity caused by the solution method of the non-convex constrained optimization problem in the current precoding design process of the millimeter-wave massive MIMO system, the present invention provides a A Hybrid Precoding Design Method in Millimeter-Wave Massive MIMO Systems
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Embodiment 1
[0065] This embodiment provides a hybrid precoding design method in a millimeter-wave massive MIMO system, combining figure 1 The schematic diagram of the hybrid precoding structure shown in the millimeter wave massive MIMO system includes N s The transmitted signal s of a data stream is digitally precoded by the digital precoder at the transmitting end, and then transmitted to the An analog precoder composed of two radio frequency chains, a phase shifter and a radio frequency adder, after the analog precoder performs analog precoding processing, the data stream is mapped to N t on the root transmitting antenna, and send it to the noise-added lobe decomposition channel for data transmission, and the receiving end passes N r The root receiving antenna receives data, and sequentially processes it through an analog combiner and a digital combiner to obtain a received signal y, and realize multi-path data transmission including multiple data streams.
[0066] Assume that in the...
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The invention discloses a hybrid precoding design method in a millimeter-wave large-scale MIMO system. In order to solve the precoding design process of a millimeter-wave large-scale MIMO system, the solution method for the optimization problem of non-convex constraints leads to low spectral efficiency of the system , the problem of high computational complexity, the hybrid precoding design method provided by the present invention adopts the lobe decomposition channel model to design the hybrid precoding in the millimeter-wave massive MIMO system, which can improve the system spectral efficiency while ensuring the computational complexity . According to the method of the present invention, the lobe decomposition channel is used in system modeling, the optimization problem containing non-convex constraints is transformed, and the correlation between the analog precoding matrix and the digital precoding matrix is fully utilized, and according to the digital precoding Based on the implicit sparse structure of the matrix, the self-support set and common support set of each data stream in each lobe are obtained, and based on this, the hybrid precoding is jointly designed to improve the spectral efficiency of the system.
Description
technical field [0001] The invention relates to a hybrid precoding design method in a millimeter wave massive MIMO system, and belongs to the technical field of wireless communication. Background technique [0002] With the explosive growth of wireless data volume, the millimeter wave massive MIMO system has received more and more attention. As one of the key technologies of the fifth generation mobile communication technology, it has the significant advantages of high data transmission rate and high reliability. . In a traditional MIMO system, the transmitting end eliminates part or all of the interference between data streams in advance through digital precoding technology, so that the spatial distribution characteristics of the transmitted signal match the channel conditions and obtain better spectral efficiency and bit error rate performance . However, for massive MIMO systems, the scale of the antenna array is greatly increased. If the traditional all-digital precodin...
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IPC IPC(8): H04B7/0456H04B7/06H04B7/08
CPCH04B7/0456H04B7/0613H04B7/08
Inventor 李正权李树梅袁月马可李君陆波丁文杰
Owner JIANGNAN UNIV