Any of a number of techniques whereby a series of information-carrying quantities occurring at discrete instances of time is encoded into a corresponding series of electromagnetic carrier pulses.

A device for the pulse modulation of a radio-frequency carrier signal

an electronic circuit that causes the phase angle of a modulated wave to vary in accordance with the modulating signal

(algebra) A module that has a basis. Equivalently, a module consisting of n-tuples of ring elements with no extra identities. (Then the number n is said to be its rank.) Equivalently, a direct sum whose summands are all the same ring. (The quantity of summands may be more than two.)

plural of R-module

plural of phase modulator

plural of pulse modulator

plural of Clifford module

plural of lunar module

(astronautics) The spacecraft used in the Apollo missions that was designed for the landing on the surface of the Moon; the lunar excursion module.