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Method for optimizing zero-forcing precoding matrix of visible light communication system

A technology of zero-forcing precoding and visible light communication, which is applied in the field of optimizing the zero-forcing precoding matrix of visible light communication systems, can solve problems such as inappropriateness, and achieve high-speed effects

Active Publication Date: 2021-03-12
SOUTHEAST UNIV
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Problems solved by technology

These sum rate expressions are not suitable as rate indicators for real systems

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  • Method for optimizing zero-forcing precoding matrix of visible light communication system
  • Method for optimizing zero-forcing precoding matrix of visible light communication system
  • Method for optimizing zero-forcing precoding matrix of visible light communication system

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[0028] Below in conjunction with specific embodiment, further illustrate the present invention, should be understood that these examples are only for illustrating the present invention and are not intended to limit the scope of the present invention, after having read the present invention, those skilled in the art will understand the various equivalent forms of the present invention All modifications fall within the scope defined by the appended claims of this application.

[0029] A method for optimizing the zero-forcing precoding matrix of a visible light communication system. Firstly, a model for maximizing the sum rate is established, and then the model for maximizing the sum rate is transformed into an iterative solution to a non-convex problem. In one iteration, the Cauchy-Shih Watts inequality and basic inequality replace the only non-convex constraint with a convex constraint, and then solve a convex problem to obtain a precoding matrix. When the convergence condition ...

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Abstract

The invention discloses a method for optimizing a zero-forcing precoding matrix of a visible light communication system. The method comprises the following steps of: firstly, establishing a sum rate maximization model, then converting the sum rate maximization model into iterative solution for a non-convex problem, in the iteration, replacing a unique non-convex constraint with a convex constraintby utilizing the Cauchy Schwartz inequality and the AM-GM inequality, solving a convex problem to obtain a pre-coding matrix, stopping iteration when a convergence condition is met, and taking the pre-coding matrix as a final result, otherwise, continuing the next iteration. According to the invention, a higher sum rate is obtained under the same optical power constraint condition.

Description

technical field [0001] The invention relates to a method for optimizing a zero-forcing precoding matrix of a visible light communication system, and belongs to the technical field of visible light communication. Background technique [0002] At present, in the optimization method of the zero-forcing precoding matrix in the visible light communication system, the main research direction is the sum rate maximization under the limitation of optical power. Existing research methods have derived different sum rate expressions, and different power constraints or signal modulation constraints, and based on this, the sum rate maximization model has been established. These sum rate expressions are not suitable as rate indicators for real systems. Contents of the invention [0003] Purpose of the invention: In order to overcome the deficiencies in the prior art, the present invention provides a method for optimizing the zero-forcing precoding matrix of the visible light communicati...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/116H04B10/516H04B10/50
CPCH04B10/116H04B10/516H04B10/502
Inventor 陈明管军蒋良成肖仁良
Owner SOUTHEAST UNIV
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