Analog Modulation

Analog modulation is the process of varying the properties of a high frequency periodic waveform, called carrier signal, with respect to the instantaneous value of another waveform, called modulating signal, which contains the information to be transmitted. The purpose of analog modulation is to transfer the information from the low frequency modulating signal to the high frequency carrier signal, so that it can be transmitted over long distances through the atmosphere or space. The most common types of analog modulation are amplitude modulation (AM), frequency modulation (FM) and phase modulation (PM). In AM, the amplitude of the carrier signal is varied in proportion to the amplitude of the modulating signal. In FM, the frequency of the carrier signal is varied in proportion to the amplitude of the modulating signal. In PM, the phase of the carrier signal is varied in proportion to the amplitude of the modulating signal.
Your Previous Searches
Random Picks
  • Gravity Gradient Stabilization: Gravity Gradient Stabilization is a method of stabilizing a spacecraft by utilizing the natural gravitational forces of the Earth. This technique involves aligning the spacecraft in a way that the long axis of the spacecraft is aligned with ... Read More >>
  • Global Coverage: Global Coverage refers to the ability of a space system to provide continuous and seamless communication, navigation, and remote sensing services to any point on the Earth's surface. Achieving global coverage requires a constellation of sat ... Read More >>
  • Flywheels: In space and astronautical engineering, flywheels are mechanical devices used for energy storage and attitude control of spacecraft. They consist of a spinning rotor that stores kinetic energy, which can be used to power spacecraft systems ... 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