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Polarization-QAM united modulation power amplifier energy efficiency optimization scheme based on differential evolution

A joint modulation and polar modulation technology, which is applied in various modulation transmitter/receiver arrangements, modulation carrier systems, digital transmission systems, etc., to achieve the effect of power amplifier energy efficiency performance optimization

Inactive Publication Date: 2017-12-15
BEIJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0004] Aiming at the nonlinear distortion effect of the power amplifier and the problem that the energy efficiency of the power amplifier is affected by many factors, the present invention proposes a polarization-QAM joint modulation power amplifier energy efficiency optimization scheme based on differential evolution

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  • Polarization-QAM united modulation power amplifier energy efficiency optimization scheme based on differential evolution
  • Polarization-QAM united modulation power amplifier energy efficiency optimization scheme based on differential evolution
  • Polarization-QAM united modulation power amplifier energy efficiency optimization scheme based on differential evolution

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Embodiment Construction

[0022] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0023] The present invention is a method that can dynamically find the optimal QAM modulation order, polar modulation order, power amplifier output power back-off value and pre-compensation factor according to the changing channel state information, data rate and bit error rate requirements so that the energy efficiency The optimal energy efficiency optimization scheme of polarization-QAM joint modulation power amplifier based on differential polarization.

[0024] In a wireless communication system, the energy consumption of the base station accounts for about 70% of the system energy consumption, and the power amplifier, as a key component of the base station, consumes 50%-80% of the total energy of the base station. The energy conversion efficiency is only 5%-10%. This is because in order to avoid nonlinear distortion, it is necessary to limit the power a...

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Abstract

The invention discloses a polarization-QAM united modulation power amplifier energy efficiency optimization scheme based on differential evolution, and belongs to the technical field of wireless communication. Firstly, advantages of QAM modulation and polarization modulation in respective power amplifier linear and non-linear regions are combined, and power amplifier energy efficiency is enhanced by using polarization-QAM united modulation. Then, energy efficiency of polarization-QAM united modulation is affected by many factors such as channel state information, data speed and error rate requirements and modulation order, and the factors affect mutually. Then, in order to solve the problem, the invention raises an energy efficiency constraint optimization problem, and provides a scheme for solving the constraint optimization problem by using a differential evolution algorithm. And at last, theory and simulated analysis show that the scheme can effectively enhance the power amplifier energy efficiency.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a polarization-QAM joint modulation technology and multi-parameter constrained optimization problems. Specifically, it refers to a polarization-QAM joint modulation power amplifier energy efficiency optimization scheme based on differential evolution. Background technique [0002] In a wireless communication system, the energy consumption of the base station accounts for about 70% of the system energy consumption, and the power amplifier, as a key component of the base station, consumes 50%-80% of the total energy of the base station. The energy conversion efficiency is only 5%-10%. This is because in order to avoid nonlinear distortion, it is necessary to limit the power amplifier to work in the linear region with low conversion efficiency. [0003] At present, there have been some researches on improving the energy efficiency of power amplifiers in ...

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Application Information

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IPC IPC(8): H04L27/00H04L27/36
CPCH04L27/0008H04L27/36H04L27/367
Inventor 冯春燕史建波刘芳芳赵殊伦
Owner BEIJING UNIV OF POSTS & TELECOMM
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