Energy-constrained slot-amplitude modulation with dimming support
This letter proposes a modulation scheme that combines both pulse slots and amplitudes in a flexible manner to obtain a desired level of flicker-free dimming while efficiently conveying information for visible light communication. The scheme is referred to as energy-constrained slot-amplitude modulation (ECSAM). Specifically, the total energy for every macro-symbol, containing multiple pulse slots, is fixed at a level that depends on the requested dimming target by adjusting the number of active slots and their amplitude levels.