One of three ways of modifying a sine wave signal to make it carry information. The sine or "carrier" wave has its phase changed in accordance with the information to be transmitted.
Angle modulation in which the phase of the carrier is controlled by the modulating waveform. The amplitude of the modulating wave determines the amount of phase shift, and the frequency of the modulation determines how often the phase shifts.
Modulation is the process of using a medium to carry information. A torch beam could be "modulated" by turning it on and off, thus sending digital information. An electrical sine wave travelling down a twisted wire pair can also be modulated to carry information, a sine wave that is defined by its frequency, amplitude and phase. These are the only three parameters of a sine wave that can thus be changed to carry information. Phase modulation is typical used in higher speed modems.
When the information is impressed on a radio frequency signal by varying its phase angle
A modulation technique. The phase of the carrier sine wave is modified to add the information.
A method of impressing data onto an alternating-current (AC) waveform by varying the instantaneous phase of the wave. This scheme can be used with analog or digital data.
modulation of the phase of the carrier wave
A technique of producing indirect FM.
It's a type of modulation where the carrier's phase is varied acording to the amplitude variation of the baseband signal.
A modulation technique in which the phase of a signal is altered to diferentiate between a binary 1 and 0.
The modification of the phase of a higher frequency, constant magnitude carrier signal controlled by the amplitude and phase of a lower frequency baseband or audio signal.
Data is contained in the changes in the phase of the carrier.
A transmission technique that modulates a data signal into a fixed carrier by modifying the phase of the carrier wave.
One of the three ways of modulating or altering a signal so that it is able to carry information. The other two are amplitude and frequency modulation. Phase modulation is used in high speed modems.
A form of modulation which works by superimposing an information signal onto an RF carrier by varying the phase of successive sine waves of the carrier.
Modulation in which the phase of a signal is caused to depart from its reference value by an amount proportional to the instantaneous value of the modulating function. A signal phase modulated by a given function can be regarded as the same as a signal frequency modulated by the time derivative of that function.
Phase modulation (PM) is a form of modulation which represents information as variations in the instantaneous phase of a carrier wave.