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Antenna-by-antenna power robust optimization method based on NOMA system

An antenna power and robust optimization technology, applied in the field of signal processing, can solve the problem of low robustness and achieve the effect of improving robustness

Active Publication Date: 2021-12-14
GUANGDONG UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the technical defect of low robustness of solving the original problem under the traditional NOMA system, the present invention provides a robust optimization method based on the antenna-by-antenna power under the NOMA system

Method used

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  • Antenna-by-antenna power robust optimization method based on NOMA system
  • Antenna-by-antenna power robust optimization method based on NOMA system
  • Antenna-by-antenna power robust optimization method based on NOMA system

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Embodiment 1

[0071] Such as figure 1 As shown, an antenna-by-antenna power robust optimization method based on the NOMA system includes the following steps:

[0072] S1: Establish the constrained optimization objective problem of the NOMA system, which includes the antenna-by-antenna power minimization model and the quality constraints of robust user services;

[0073] S2: Transform the robust user service quality constraints into quadratic matrix inequalities, and transform the constrained optimization objective problem into a semi-positive definite programming problem;

[0074] S3: Solve the semi-positive definite programming problem, and obtain the optimal solution or suboptimal solution of the semi-positive definite programming problem.

[0075] In the above scheme, an antenna-by-antenna power model is established, and the quality constraints of robust user services are given, and then the optimization problem is transformed into a positive semi-definite programming problem by using t...

Embodiment 2

[0130] Such as figure 2 As shown, the user with stronger channel conditions (the smaller the distance between the base station and the user), the larger the subscript. User quality of service constraints, that is, the power ratio of signal to interference plus noise (signal-to-interference-noise ratio) of each user must be greater than a threshold, and the information of strong users will affect weak users, in other words, the information of strong users Will become the interference of weak user information; but conversely, weak user information will not affect strong users.

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Abstract

The invention relates to an antenna-by-antenna power robust optimization method based on an NOMA system, and the method comprises the following steps: S1, building a constraint optimization target problem of the NOMA system, wherein the constraint optimization target problem comprises an antenna-by-antenna power minimization model and the quality constraint of robust user service; S2, converting the robust user service quality constraint into a quadratic matrix inequality, and converting a constraint optimization target problem into a positive semidefinite programming problem; and S3, solving the positive semidefinite programming problem to obtain an optimal solution or a sub-optimal solution of the positive semidefinite programming problem. According to the scheme, the antenna-by-antenna power model is established, the quality constraint of the robust user service is given, then the S lemma and the positive semidefinite technology are applied to convert the optimization problem into the positive semidefinite planning problem, and finally the positive semidefinite planning problem is solved, so that the optimal solution or the sub-optimal solution of the original problem is rapidly solved, the robustness of the system is improved, and the system is closer to practical application.

Description

technical field [0001] The present invention relates to the field of signal processing, and more specifically, relates to a method for robust optimization of antenna-by-antenna power based on the NOMA system. Background technique [0002] At present, non-orthogonal multiple access (NOMA for short) is already an important wireless access technology, which is applicable to the fifth generation wireless network. In recent years, in multi-user systems, the application of non-orthogonal multiple access beamforming has become more and more popular due to its features of improving user fairness and system throughput. NOMA beamforming usually assumes perfect channel state information known at the base station, allowing the base station to apply superposition coding using spatial degrees of freedom, and the receiver to perform continuous interference cancellation at a manageable cost, while applying continuous interference cancellation techniques can effectively eliminate Interferen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W52/24H04W52/26H04W24/02H04W24/06H04B7/0426
CPCH04W52/241H04W52/26H04W24/02H04W24/06H04B7/0426
Inventor 林泽帆黄永伟杨文政
Owner GUANGDONG UNIV OF TECH
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