Visible-light diversity-reception method and system

A technology of diversity reception and visible light, which is applied in the field of wireless optical communication and can solve the problems of increasing bit error rate at the receiving end and affecting the quality of visible light long-distance communication.

Active Publication Date: 2013-12-25
BEIJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0004] However, in the existing technology, visible light reception generally adopts a single-reception scheme, and multi-reception schemes are the direction of research attempts
Due to the attenuation problem in the visible light transmission p

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Embodiment Construction

[0056]In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0057] Embodiments of the present invention first propose a visible light diversity receiving method, see figure 1 ,include:

[0058] Step 101: Diversity receiving visible light signals through multiple photodetectors and converting them into electrical signals.

[0059] Step 102: A / D conversion is performed on each channel of electrical signals ...

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Abstract

The invention provides a visible-light diversity-reception method and system. The method includes: carrying out diversity reception on visible-light signals through a plurality of photoelectric detectors and converting the visible-light signals into electrical signals; carrying out A/D conversion on the diversity-reception electrical signals of different circuits through an A/D conversion circuit; carrying out moving average filtering on the signals, which undergo the A/D conversion, of different circuits; combining the signals, which undergo the filtering, on the different circuits; carrying out signal clock recovery processing on the combined signals so that final signals are obtained. In the visible-light diversity-reception method and device, the plurality of photoelectric detectors are adopted to substitute a single photoelectric detector for data reception so that under a condition that transmission-end power is not changed, a reception-end bit error rate which increases with the increase of a communication distance can be effectively reduced and thus a signal reception quality of the system is improved significantly; at the same time, the diversity-reception method is capable of reducing effects of reception-end signal fading so that a comparatively high diversity gain is obtained and reception sensitivity is improved.

Description

technical field [0001] The present invention relates to the technical field of wireless optical communication, in particular to a visible light diversity receiving method and system. Background technique [0002] After the high-brightness white light-emitting diode (LED) came out, with the gradual improvement of light efficiency, its application gradually expanded from the display field to the lighting field, and it developed rapidly. Compared with traditional lighting equipment, white LEDs have the advantages of low power consumption, long service life, small size, and environmental protection, and are regarded as the fourth generation of energy-saving and environment-friendly lighting products. Another outstanding advantage of white LEDs is that the response sensitivity is very high, so LEDs can be used for ultra-high-speed data communication. Visible light communication (visible light communication, VLC) is an emerging optical wireless communication technology developed ...

Claims

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Application Information

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IPC IPC(8): H04B7/08H04B10/69
Inventor 韩大海王绪峰张民焦璐李青张翔
Owner BEIJING UNIV OF POSTS & TELECOMM
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