Multi-stage amplitude modulation-based methods, apparatuses and systems for coding and decoding visible light signal
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United States of America Patent
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Oct 3, 2017
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Jun 9, 2016
app pub date -
Jan 30, 2016
filing date -
Jul 31, 2013
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Abstract
The present application relates to multi-stage amplitude modulation-based methods, apparatuses, and systems for coding and decoding a visible light signal. The coding method includes the following steps: dividing to-be-transmitted information into multiple information units, where each information unit includes multiple bits; converting the multiple information units into multiple electrical signal units indicated by at least three levels, where an interval indicated by a first level in the at least three levels exists between adjacent electrical signal units, and each electrical signal unit uses a combination of other levels in the at least three levels to represent the multiple bits of a corresponding information unit; combining the electrical signal units to obtain a coded electrical signal; and transmitting the coded electrical signal in a visible light signal form.
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