What is amplitude modulation in data communication?

What is amplitude modulation in data communication?

Amplitude modulation is a process by which the wave signal is transmitted by modulating the amplitude of the signal. It is often called AM and is commonly used in transmitting a piece of information through a radio carrier wave. Amplitude modulation is mostly used in the form of electronic communication.

What is modulation in communication system?

Modulation is the process of encoding information from a message source in a way that is suitable for transmission. By superimposing a message on to a high frequency signal known as a carrier wave (or sinusoidal signal), video, voice and other data can be transmitted.

What are the characteristics of amplitude modulation?

amplitude modulation (AM), variation of the amplitude of a carrier wave (commonly a radio wave) in accordance with the characteristics of a signal, such as a vocal or musical sound composed of audio-frequency waves.

How does demodulation work?

Demodulation is extracting the original information-bearing signal from a carrier wave. A demodulator is an electronic circuit (or computer program in a software-defined radio) that is used to recover the information content from the modulated carrier wave.

What is amplitude modulation, and what is an example?

In amplitude modulation, the amplitude or strength of the carrier oscillations is varied. For example, in AM radio communication , a continuous wave radio-frequency signal (a sinusoidal carrier wave) has its amplitude modulated by an audio waveform before transmission.

What does amplitude modulation mean?

Freebase(0.00 / 0 votes)Rate this definition: Amplitude modulation. Amplitude modulation is a technique used in electronic communication, most commonly for transmitting information via a radio carrier wave. AM works by varying the strength of the transmitted signal in relation to the information being sent.

What is the formula for calculating amplitude?

Amplitude is the utmost height observed in the wave. The amplitude is measured in decibels and is denoted by A. Formula to calculate amplitude of a wave is given by: where, A = Amplitude of the wave [decibels] D = Distance traveled by the wave [meters]

What are some limitations of amplitude modulation?

An amplitude modulation signal is not efficient in terms of its power usage.

  • It is not efficient in terms of its use of bandwidth.
  • AM detectors are sensitive to noise hence an amplitude modulation signal is prone to high levels of noise.
  • Reproduction is not high fidelity.