Modulation Schemes


Modulation schemes refer to the techniques used to modify the characteristics of a carrier signal in order to transmit information. In the context of space and astronautical engineering, modulation schemes are used to transmit data between spacecraft and ground stations, as well as between spacecraft in space. The choice of modulation scheme depends on factors such as the available bandwidth, the distance between the transmitter and receiver, and the required data rate. Common modulation schemes used in space and astronautical engineering include amplitude modulation (AM), frequency modulation (FM), phase modulation (PM), and quadrature amplitude modulation (QAM). AM involves varying the amplitude of the carrier signal to transmit information, while FM involves varying the frequency. PM involves varying the phase of the carrier signal, and QAM involves varying both the amplitude and phase. These modulation schemes can be further combined with coding techniques to improve the reliability and efficiency of data transmission.


Your Previous Searches
Random Picks

  • Astronautics: Astronautics is the branch of engineering that deals with the design, development, and operation of spacecraft. It covers a wide range of topics including rocket propulsion, spacecraft design, guidance and control systems, communication sys ... Read More >>
  • Trajectory Calculation: Trajectory calculation is the process of determining the path of a spacecraft or a missile through space and time, taking into account various factors such as gravitational forces, atmospheric drag, and thrust. Trajectory calculation involv ... Read More >>
  • Cargo Ships: In space and astronautical engineering, cargo ships refer to spacecraft designed to transport goods, supplies, and equipment to and from space stations, planetary bases, and other destinations in space. These ships are essential for resuppl ... Read More >>
Top News

This week on "Sunday Morning" (April 20)...

A look at the features for this week's broadcast of the Emmy-winning program, hosted by Jane Pauley....

News Source: CBS News on 2025-04-17

Scientists detect strongest hints yet of life on a distant planet...

Scientists have detected unique chemical patterns similar to those produced by the Earth's algae and seaweed — raising the possibility of the presence of a warm ocean, perhaps teeming with life, on ...

News Source: NBC News on 2025-04-17

Is there life on another planet? Scientists find the strongest evidence yet...

Near a planet far, far away astronomers have found traces of chemicals that on Earth are only produced by living beings....

News Source: Al Jazeera English on 2025-04-17

Scientists find strongest evidence yet of life on an alien planet | CNN...

In a potential landmark discovery, scientists using the James Webb Space Telescope have obtained what they call the strongest signs yet of possible life beyond our solar system, detecting in an alien ...

News Source: CNN on 2025-04-17

Katy Perry's trip to space wasn't inspirational. It was tone-deaf marketing....

Katy Perry indulged in a space tourism trip Monday, courtesy of Jeff Bezos' company. It's the latest in a long line of missteps for the singer....

News Source: Business Insider on 2025-04-14