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A method for optimizing zero-forcing precoding matrix in 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: 2022-02-01
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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  • A method for optimizing zero-forcing precoding matrix in visible light communication system
  • A method for optimizing zero-forcing precoding matrix in visible light communication system
  • A method for optimizing zero-forcing precoding matrix in visible light communication system

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Embodiment Construction

[0028] Next, in connection with the specific embodiments, the present invention is further clarified that these examples are intended to illustrate only the invention and are not intended to limit the scope of the invention, and those skilled in the

[0029] A method of optimizing visible optical communication systems forced zero precoding matrix, first establishing and maximizing the model, and then transforming and maximizing the model to an iterative solution to non-convex problems, in one iteration, using Kexi-Shi Wats inequality, basic inequality replace the unique non-convex constraint into a convex constraint, and then solve a convex problem to obtain a precoding matrix, when meeting convergence conditions, the iterative termination is terminated, the precoding matrix is ​​the final result, otherwise continue One iteration. The method of the present invention is used, and a higher sum rate is ...

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Abstract

The invention discloses a method for optimizing a 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 converted into an iterative solution to a non-convex problem. In one iteration, the Cauchy-Schwartz 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 is met, the iteration terminates, and the precoding matrix is ​​the final result , otherwise proceed to the next iteration. The present invention obtains a higher sum rate under the same optical power constraint condition.

Description

Technical field [0001] The present invention relates to a method of optimizing visible light communication systems forced zero precoding matrix, belonging to the field of visible optical communication technology. Background technique [0002] In the optimization method of forced zero precoding matrix in the visible optical communication system, the main research direction is the maximum rate of optical power limits. Existing research methods have derived different and rate expressions, as well as different power constraints or modulation constraints, and to maximize the model with this establishment and rate. These and rate expressions are not suitable as rate indicators as actual systems. Inventive content [0003] Apparatus: In order to overcome the shortcomings in the prior art, the present invention provides a method of optimizing visible light communication systems forced zero precoding matrix, first establishing and maximizing the maximization of the rate, and then maximiz...

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Application Information

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Patent Type & Authority Patents(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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