Patent ID: 9319134
Filing Date: 2016-04-19
CPC Classification: H04B

Claim Text:
1. A method for optically transmitting data using a pulse-width-modulated light source, the method comprising: specifying a pulse duty factor of a pulse width modulation to set the brightness of the light source as a ratio between a blanking time of the light source and a period of a pulse width modulation cycle, wherein a difference between the period and the blanking time corresponds to a bright-up time of the light source within one pulse width modulation cycle, and dividing the bright-up time of the pulse width modulation cycle into a plurality of partial bright-up times separated by at least one blanking to transmit a data symbol, wherein each blanking has a selected start time and time period, wherein the data symbol transmitted during the pulse width modulation cycle is defined as a function of the respective start times of all of the blankings within that pulse width modulation cycle, wherein the sum of the partial bright-up times within the pulse width modulation cycle essentially corresponds to the bright-up time according to the specified pulse duty factor; and providing training sequences at least at the start of a data transmission.