pulse-time modulation
Noun: A method of signal transmission where the information being sent is encoded by varying (modulating) the timing intervals between successive pulses in a pulse train. The key characteristic being altered is the temporal spacing of the pulses, not their amplitude, width, or position relative to a fixed reference.
This term is used in the context of telecommunications, electronics, and signal processing to describe a specific modulation technique.
Examples: * The early telegraph system used a form of pulse-time modulation to send messages. * In this design, the analog audio signal is converted into a digital stream via pulse-time modulation. * The engineer explained that pulse-time modulation is less susceptible to amplitude noise than other methods.
- Technical Context: Pulse-time modulation (PTM) is an umbrella category that includes specific implementations like Pulse Position Modulation (PPM) and Pulse Frequency Modulation (PFM). In PPM, the position of a pulse relative to a fixed time reference is varied. In PFM, the instantaneous frequency of the pulse train is varied based on the modulating signal.
- Comparison: It is often contrasted with pulse-amplitude modulation (PAM) and pulse-width modulation (PWM), where the amplitude or the duration of the pulses are varied, respectively.
- Pulse Position Modulation (PPM): A specific type of pulse-time modulation.
- Pulse Frequency Modulation (PFM): A specific type of pulse-time modulation.
- Modulation (n): The general process of varying a carrier signal to encode information.
- Demodulation (n): The process of extracting the original information from a modulated signal.
- Time-interval modulation
- Pulse spacing modulation
- To encode via pulse-time modulation: The process of using this technique.
- The sensor data was encoded via pulse-time modulation for transmission.
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modulation of the time between successive pulses
