Hybrid precoding method based on partial connection in millimeter wave large-scale MIMO

A millimeter-wave, large-scale technology, applied in space transmit diversity, diversity/multi-antenna systems, radio transmission systems, etc., can solve problems such as limited performance of analog structures and constant amplitude constraints

Inactive Publication Date: 2019-04-12
HANGZHOU DIANZI UNIV
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Problems solved by technology

However, the performance of the analog structure is limited by the constant amplitude constraint on the analog phase shifter

Method used

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  • Hybrid precoding method based on partial connection in millimeter wave large-scale MIMO
  • Hybrid precoding method based on partial connection in millimeter wave large-scale MIMO
  • Hybrid precoding method based on partial connection in millimeter wave large-scale MIMO

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Embodiment Construction

[0064] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings and accompanying tables

[0065] Table 1 shows the system parameter values ​​required in the simulation

[0066] Table 1

[0067] parameter

value

Base station transmit power

1w

Number of millimeter wave scatterers L

50

[0068] It can be seen from the graph that the present invention sets the required system parameters and the initial value of the algorithm, the total transmission power of the base station is 1w, and the transmission power of each antenna is equal. According to the theorem of large numbers, the number L of millimeter wave scatterers is set to 50. For different simulation parameters N t ,N s ,N r ,N RF Will be reset.

[0069] First, for N t =128,N r =32,N RF =8=N s In this case, the system reachability and rate are compared with the signal-to-noise ratio, and the results are as follows: fi...

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Abstract

The invention discloses a hybrid precoding method based on partial connection in millimeter wave large-scale MIMO. The method is characterized in that a receiving end adopts a full-digital combiner, achannel matrix is divided into block matrices which are equal to the number of radio frequency links, and the phase of an analog precoding matrix of each radio frequency link of a sending end is designed to be the phase of a maximum right singular value vector of the block matrix corresponding to the channel matrix decomposition; and after the analog precoding matrix is obtained, a digital precoding matrix of a base station end and a digital combination matrix of the receiving end are designed through SVD decomposition on the equivalent channel matrix. According to the method, the system reachable sum rate higher than that of the analog precoding can be obtained. Although the algorithm performance provided by the invention is lower than the optimal digital precoding, the hardware complexity and the power consumption of the base station are far lower than that of the optimal digital precoding scheme.

Description

technical field [0001] The invention belongs to the technical field of information and communication engineering, and relates to a millimeter wave massive MIMO technology in a wireless communication system, in particular to a partial connection-based hybrid precoding method in a millimeter wave massive MIMO. Background technique [0002] With the rapid development of wireless communication technology, spectrum resources have been very tight in the past ten years, and the demand for wireless network capacity is also increasing. Most of the devices work in the crowded microwave band, which seriously restricts the improvement of the communication rate. Therefore, the millimeter wave communication with a frequency band of 30GHz-300GHz will become one of the most promising candidate spectrums for the next generation communication system. [0003] In traditional Multiple Input and Multiple Output (MIMO) systems, an all-digital precoding architecture is generally used, that is, a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/0456H04B7/06H04B7/08H04B17/391
CPCH04B7/0456H04B7/0626H04B7/0842H04B17/391
Inventor 杨晓慧曹海燕胡文娟马子昌许方敏
Owner HANGZHOU DIANZI UNIV
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