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Hybrid precoding design method under millimeter wave large-scale MIMO-NOMA system based on physical layer security

A MIMO-NOMA, physical layer security technology, applied in the field of ultrasonic motor, to achieve the effect of fast iterative convergence, reducing the number and ensuring spectral efficiency

Active Publication Date: 2020-01-14
ZHENGZHOU UNIV +1
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Problems solved by technology

[0002] With the increasing data demand of mobile users in the future, the current cellular network (Long Term Evolution, LTE) based on low-frequency microwave communication will not be able to meet such a huge data demand

Method used

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  • Hybrid precoding design method under millimeter wave large-scale MIMO-NOMA system based on physical layer security
  • Hybrid precoding design method under millimeter wave large-scale MIMO-NOMA system based on physical layer security
  • Hybrid precoding design method under millimeter wave large-scale MIMO-NOMA system based on physical layer security

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Embodiment Construction

[0030] Below in conjunction with accompanying drawing, the present invention will be further described:

[0031] The design of the present invention is under a single-cell downlink millimeter-wave massive MIMO-NOMA system, the signal of the m-th user in the g-th beam is shown in (1), and the channel vector is denoted as h k , the analog precoding is denoted as A, and the digital precoding is denoted as d k , the signal distribution power is denoted as p k , the signal is denoted as s k , the noise is denoted as v k .

[0032]

[0033] In the MIMO-NOMA system, the number of beams is the number of radio frequency chains RF, and each beam can serve multiple users at the same time. Therefore, the number of supported users may be greater than the number of RF chains. When the number of users can be greater than the number of RF chains, it can be seen from formula (1) that we need to group users, and each group of users is included in one beam to receive data. The specific g...

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Abstract

The invention discloses a hybrid precoding design method under a millimeter wave large-scale MIMO-NOMA system based on physical layer security. The method comprises the following steps: acquiring a signal of an mth user in a gth beam of a single cell; when the number of users may be greater than the number of RF chains, grouping users, receiving data and channel state information by each group ofusers in one wave beam, calculating the channel gain of each user, taking the user with the maximum channel gain as the cluster head of the first group of wave beams, respectively calculating the correlation between the redundant users and each cluster head user, and selecting the cluster head with the maximum correlation as the same group; generating an analog pre-code A and a digital pre-code dkaccording to the channel state information of the cluster head. According to the invention, user grouping is efficiently completed, and a good foundation is provided for subsequent analog pre-codingand digital pre-coding.

Description

technical field [0001] The invention relates to a hybrid precoding design method under a millimeter-wave large-scale MIMO-NOMA system based on physical layer security and a motor suitable for the method, belonging to the field of ultrasonic motors. Background technique [0002] With the continuous increase of mobile users' demand for data in the future, the current cellular network (Long Term Evolution, LTE) based on low-frequency microwave communication will not be able to meet such a huge data demand. Contents of the invention [0003] In order to solve the above technical problems, the present invention provides a method for designing hybrid precoding in a millimeter-wave massive MIMO-NOMA system based on physical layer security, specifically through the following technical solutions: [0004] A kind of hybrid precoding design method under the millimeter-wave massive MIMO-NOMA system based on physical layer security described in the present invention comprises the follo...

Claims

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Application Information

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IPC IPC(8): H04B7/0413H04B7/0456
CPCH04B7/0413H04B7/0456
Inventor 孙钢灿赵飞郝万明朱政宇姬祥李双志郭新
Owner ZHENGZHOU UNIV
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