Pulse-position modulation (PPM) is a form of signal modulation in which M message bits are encoded by transmitting a single pulse in one of possible time-shifts. This is repeated every T seconds, such that the transmitted bit rate is M/T bits per second. It is primarily useful for optical communications systems, where there tends to be little or no multipath interference.
Read more about Pulse-position Modulation: Synchronization, Sensitivity To Multipath Interference, Non-coherent Detection, PPM Vs. M-FSK, Applications For RF Communications
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