Mu-law method and system for reducing nonlinearity of light source LED of visible light communication system

A visible light communication and nonlinear technology, applied in transmission systems, multi-frequency code systems, short-range systems, etc., can solve problems such as reducing the nonlinearity of light source LEDs in visible light communication systems, and achieve the effect of eliminating signal distortion and improving reliability.

Inactive Publication Date: 2017-12-08
UNIV OF SCI & TECH BEIJING
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  • Abstract
  • Description
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a μ-law method and system for reducing the nonlinearity of the light source LED of the visible light communication system, so as to solve the problem in the prior art that there is no nonlinear reduction processing from the transmitted signal itself

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  • Mu-law method and system for reducing nonlinearity of light source LED of visible light communication system
  • Mu-law method and system for reducing nonlinearity of light source LED of visible light communication system
  • Mu-law method and system for reducing nonlinearity of light source LED of visible light communication system

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Embodiment 1

[0056] see figure 1 As shown, the embodiment of the present invention provides a μ-law method for reducing the nonlinearity of the light source LED of the visible light communication system, including:

[0057] Step 101: At the sending end, obtain the signal to be sent;

[0058] Step 102: performing μ-law logarithmic compression on the acquired signal to be transmitted, and multiplying it by a preset pre-distortion coefficient to obtain a μ-law compressed signal;

[0059] Step 103: Send the μ-law compressed signal.

[0060] In the μ-law method for reducing the nonlinearity of the light source LED of the visible light communication system described in the embodiment of the present invention, at the transmitting end, the acquired signal to be transmitted is subjected to μ-law logarithmic compression processing, and the peak-to-average power ratio (Peak to Average Power Ratio (Peak to Average) of the signal to be transmitted is reduced. Power Ratio, PAPR), and multiply the loga...

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Abstract

The invention provides a mu-law method and a mu-law system for reducing nonlinearity of a light source LED of a visible light communication system, being capable of eliminating signal distortion caused by nonlinear characteristic of the LED from a sent signal and thus improving reliability of the system. The method comprises the steps of acquiring the signal to be sent at a sending end; performing mu-law logarithm compression on the acquired signal to be sent and multiplying the compressed signal with a preset predistortion coefficient to acquire a mu-law compressed signal; and sending the mu-law compressed signal out. The method and the system provided by the invention are applicable to the technical field of visible light multi-carrier communication.

Description

technical field [0001] The invention relates to the technical field of visible light multi-carrier communication, in particular to a μ-law method and system for reducing the nonlinearity of a light source LED in a visible light communication system. Background technique [0002] With the continuous development of wireless communication technology and lighting technology industry, visible light-emitting diode (LED) wireless communication, as a new technology using white LED for communication, has the advantages of abundant visible light resources, safety and energy saving, large communication capacity, high transmission frequency, and transmission It has the advantages of fast speed, no electromagnetic interference, and no need for radio frequency certificates. Visible light LED wireless communication has good application prospects and occupies an important position and value in the future communication field. Using LED as the light source for indoor visible light communicati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/116H04B10/50H04B10/516H04L25/49H04L27/26
Inventor 严朝雯王建萍史尹嘉
Owner UNIV OF SCI & TECH BEIJING
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