Patent ID: 9473248
Filing Date: 2016-10-18
CPC Classification: H04B

Claim Text:
1. A method for visible light communication, the method comprising: measuring a frequency spectrum (F generating a set of candidate light intensity frequencies by selecting light intensity frequencies which are unequal to frequencies, or unequal to multiples of frequencies, of the frequency spectrum, wherein each selected frequency defines a candidate light intensity frequency; selecting from the set of candidate light intensity frequencies a first sequence of light intensity frequencies to represent a first symbol for embedding data, and selecting from the set of candidate light intensity frequencies a second sequence, different from the first, of light intensity frequencies, to represent a second symbol for embedding data; and transmitting a light signal comprising a first time period in which a light intensity of the light signal is sequentially controlled according to the first sequence of frequencies, and comprising a second time period in which the light intensity of the light signal is sequentially controlled according to the second sequence of frequencies, thereby generating a frequency hopping light signal, wherein the light intensity is controlled by modulating the light intensity between a first intensity and a second intensity.