Encyclopedia > Phase modulation

  Article Content

Phase modulation

Phase modulation (PM) is the encoding of information into a carrier wave by variation of its phase in accordance with an input signal.

Note that phase modulation can be regarded as a special case of frequency modulation where the carrier frequency modulation is the time derivative of the PM modulating signal.

Phase modulation can also be regarded as a special case of quadrature amplitude modulation.

Phase-shift keying refers to the simple case of phase modulation by a simple signal with only two states, such as in morse code or radioteletype applications.

See also:

  • modulation for a list of other modulation techniques



All Wikipedia text is available under the terms of the GNU Free Documentation License

 
  Search Encyclopedia

Search over one million articles, find something about almost anything!
 
 
  
  Featured Article
Northampton, Suffolk County, New York

... Demographics As of the census of 2000, there are 468 people, 158 households, and 121 families residing in the town. The population density is 19.9/km² ...

 
 
 
This page was created in 51.1 ms