Helgert, Hermann J. Department of Electrical and Computer Engineering, George Washington University, Washington, DC.
- Analog-to-digital conversion
- Pulse-amplitude modulation
- Pulse-width modulation
- Pulse-position modulation
- Pulse-code modulation
- Baseband transmission
- Time-division multiplexing
- Bandwidth and distortion
- Bandwidth requirements
- Pulse timing
- Frame synchronization
- Links to Primary Literature
- Additional Readings
A set of techniques whereby a sequence of information-carrying quantities occurring at discrete instances of time is encoded into a corresponding regular sequence of electromagnetic carrier pulses. Varying the amplitude, polarity, presence or absence, duration, or occurrence in time of the pulses gives rise to the four basic forms of pulse modulation: pulse-amplitude modulation (PAM), pulse-code modulation (PCM), pulse-width modulation (PWM, also known as pulse-duration modulation, PDM), and pulse-position modulation (PPM).
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