Multi-input multi-output visible light communication system energy efficiency optimization method
A technology of visible light communication and optimization method, which is applied in the field of energy efficiency optimization of multi-input and multi-output visible light communication systems, can solve the problem that energy efficiency optimization design cannot be directly applied to visible light communication systems, etc., and achieves the effects of strong practical value, easy implementation, and high result accuracy.
Active Publication Date: 2021-05-18
SOUTHEAST UNIV
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Problems solved by technology
Therefore, energy-efficiency optimized design in RF systems cannot be directly applied to VLC systems
At present, there is still a lack of energy efficiency optimization methods that can be applied to visible light communication systems in the prior art
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[0049] The technical solutions provided by the present invention will be described in detail below with reference to specific embodiments. It should be understood that the following specific embodiments are only used to illustrate the present invention and not to limit the scope of the present invention.
[0050] The energy efficiency optimization method for a multi-input multi-output visible light communication system provided by the present invention is as follows: figure 1 shown, including the following steps:
[0051] (1) Set the parameters of the MIMO visible light communication system, including channel parameters, maximum electrical power budget, maximum optical power budget, minimum rate limit and maximum bit error rate limit, and optimize with the goal of maximizing system energy efficiency;
[0052] (2) Determine the relationship between power, bias and transmission rate in the optimization problem, and express uniformly by introducing the distance vector d of the mo...
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The invention discloses a method for optimizing energy efficiency of a multi-input multi-output visible light communication system, comprising the following steps: setting parameters of the multi-input multi-output visible light communication system, and optimizing with the goal of maximizing system energy efficiency; determining power and bias in the optimization problem The relationship with the transmission rate is uniformly expressed by introducing the distance vector of the modulation symbol; the optimal distance vector is determined to obtain the optimal solution of power, DC bias and modulation order. The method of the present invention does not require additional changes to external conditions such as system hardware, and can greatly improve system efficiency and performance only through simple calculations. The power, bias and modulation order obtained by using this optimization method can maximize system energy efficiency; the present invention The optimization method has fast convergence speed, is easy to implement, has high result precision and high robustness, and the energy efficiency value of the system optimized by the method proposed by the invention is obviously higher than that of the spectrum efficiency optimization system.
Description
technical field [0001] The invention belongs to the technical field of visible light communication, and relates to a method for optimizing energy efficiency of a multi-input multi-output visible light communication system. Background technique [0002] Visible light communication (VLC) is an emerging access technology that takes into account lighting and communication, and can meet high-speed data services. It has many advantages including low cost, green security, good confidentiality, easy implementation, and good electromagnetic compatibility. . With the deepening of visible light communication research, MIMO technology has also received extensive attention in the research of visible light communication systems, and has gradually become a key technology in the design of visible light communication systems. The MIMO visible light communication system based on multiple light sources can provide ubiquitous coverage for communication and lighting, can provide higher transmis...
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IPC IPC(8): H04B7/0456H04B7/06H04B7/08H04B10/116
CPCH04B7/0456H04B7/046H04B7/0623H04B7/0854H04B10/116Y02D30/70
Inventor 王家恒曾雨旻沈弘凌昕彤赵春明
Owner SOUTHEAST UNIV