Slot Synchoronization by Reducing the PPM Pulse Width in Wireless Optical Systems

Digital pulse position modulation is an attractive modulation scheme in indoor wireless optical transmission systems because of its power efficiency. In this brief, slot synchronization by means of a reduced pulsewidth is discussed, the scheme is compared to on-off keying, and design rules for slot synchronizers are presented. The sensitivity deterioration of the prototype due to slot clock jitter is only 0.2 dB (optical power level