Modulation in which the duration of pulses is varied in accordance with some characteristic of the modulating signal. Deprecated synonyms pulse-length modulation, pulse-width modulation.

Modulation in which the pulse repetition rate is varied in accordance with some characteristic of the modulating signal.
Note: Pulse-frequency modulation is analogous to frequency modulation of a carrier wave, in which the instantaneous frequency is a continuous function of the modulating signal.

See pulse-position modulation.

Deprecated synonym for pulse-duration modulation.

Modulation in which the temporal positions of the pulses are varied in accordance with some characteristic of the modulating signal.

In radar applications, synonym pulse repetition rate.

Synonym pulse-frequency modulation.

The general class of pulse-code modulation in which the time of occurrence of some characteristic of the pulsed carrier is varied with respect to some characteristic of the modulating signal.
Note: PTM includes pulse-position modulation and pulse-duration modulation.

Deprecated synonym for pulse-duration modulation.

1. A spread spectrum system in which the RF carrier is modulated with a fixed period and fixed duty cycle sequence.
Note: At the beginning of each transmitted pulse, the carrier frequency is frequency modulated which causes additional spreading of the carrier. The pattern of the frequency modulation depends upon the spreading function which is sweeping either up or down… (Read More →)