Communication data acquisition method in visible light communication, device and equipment

Abstract

The embodiment of the invention provides a communication data acquisition method in visible light communication, device and equipment. Through extracting a baseband symbol sequence in visible light communication signals, each baseband symbol in the baseband sequence is taken as a clustering sample; based on a plurality of fuzzy groups of a fuzzy C-means clustering algorithm, according to each clustering sample, the clustering center of each fuzzy group is updated, and the membership degree of each clustering sample in each fuzzy group is updated; according to the clustering center of each fuzzy group and the membership degree of each clustering sample in each fuzzy group, a fuzzy matrix is updated to acquire the optimal fuzzy matrix; and according to each clustering sample and the optimalfuzzy matrix, communication data are acquired. Thus, during a communication signal demodulation process, inter-symbol interference, delay distortion and interference generated by noise generated to the system to communication data extraction can be effectively suppressed, the bit error rate is reduced, and the quality of visible light communication signal receiving at a receiving end can be improved.

Description

technical field [0001] Embodiments of the present invention relate to the field of communication technologies, and more specifically, to a method, device, and device for acquiring communication data in visible light communication. Background technique [0002] Today's wireless spectrum resources are tight, and many frequency bands are occupied. The visible light frequency band used by visible light communication is still a blank frequency band, which can be used without authorization. Compared with other wireless technologies, wireless optical communication has the advantages of high security and good confidentiality. And wireless optical communication uses white light LED as the light source, taking into account the two functions of lighting and signal transmission. The combination of traditional lighting technology and new wireless optical communication technology has become the general trend, and wireless optical communication will surely achieve long-term development in t...

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Problems solved by technology

[0004] Visible light communication can use WDM and DCO-OFDM modulation technology in combination, but it will also bring more intersymbol interference

Intersymbol interference, delay distortion, and system noise generated by multipath effects will increase the bit error rate and directly affect the quality of receiving VLC signals at the receiving end. How to improve the quality of VLC signal reception has become a major challenge for researchers. problem

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