Phase Modulation

Phase Modulation (PM) is a method of modulating a radio frequency carrier signal by varying the phase of the signal in response to the modulating signal. In PM, the amplitude and frequency of the carrier signal remain constant, but the phase angle changes in proportion to the modulating signal. This results in a signal that is more resistant to noise and interference than amplitude modulation (AM) signals. PM is commonly used in satellite communications, digital audio broadcasting, and some types of radar systems.
Your Previous Searches
Random Picks
  • Pascal (Pa): Pascal (Pa) is the unit of pressure in the International System of Units (SI). It is defined as one newton per square meter. In space and astronautical engineering, Pascal is commonly used to measure the pressure of gases and liquids in spa ... Read More >>
  • Communication Signal: A communication signal is an electromagnetic wave that carries information from one point to another. In space and astronautical engineering, communication signals are used to transmit information between spacecraft and ground stations, as ... Read More >>
  • Geological Repositories: Geological repositories are underground facilities designed to safely store and isolate radioactive waste from the environment for a period of time until the radioactivity has decayed to a level that is no longer hazardous. The design of ge ... Read More >>
Top News

Check out this interactive map of the early universe, considered largest ever cr...

A team of astronomers have put together the largest, most detailed map of the universe ever created – and you can explore it now....

News Source: USA Today on 2025-06-12

The Vera C. Rubin Observatory is about to totally transform astronomy...

With the ability to scan the entire southern night sky every three days, the huge Vera C. Rubin Observatory could be about to start solving the mysteries of the universe, from dark matter to Planet Ni...

News Source: New Scientist on 2025-06-12

Trump's proposed science cuts will have huge consequences...

The universe will still be there to marvel at, despite brutal cuts set to hit NASA and the National Science Foundation's budgets. But the damage to future research will be long-lasting, says Chanda Pr...

News Source: New Scientist on 2025-06-11

Starlink satellites are leaking radio signals that may ruin astronomy...

Our ability to study faint radio signals from when the first stars began to form is being threatened by SpaceX's Starlink satellites, which seem to be unintentionally leaking radio signals that overpo...

News Source: New Scientist on 2025-06-09

Asteroids around Venus pose possible 'invisible threat' to Earth: Should you be ...

A swarm of large asteroids likely lurking around Venus could one day pose an "invisible threat" to Earth if left unchecked, astronomers have warned....

News Source: USA Today on 2025-06-06