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The optical digital to analog converter (ODAC) concept is introduced to be used in an intelligent transportation system (ITS). The paper explores the performance of ODAC adapted into a traffic light head in order to enable transferring information from the infrastructure to the vehicle (I2V). The performance of such a scenario is shown by reconstructing error as a function of emitter placement, LED's...
A design and simulation of the laser beam shaping system which can be used in free space optical communication transmitter head prototype are presented. The design of refraction beam shaper has been performed and verified in optical design software ZEMAX. Because a Top-hat beam source is less affected by turbulence in atmosphere comparing with a Gaussian beam source, the scintillation index of the...
Optical domain digital to analog conversion (ODAC) has been proposed recently as a suitable technique able to cope with LED driving requirements and evolved modulation schemes (such as OFDM) in visible light communication systems (VLC). ODAC's concept is based on using groups of LEDs arranged in an array to transmit digital signals. The radiation pattern of these LED groups adds together on the optical...
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