# Modulation And Demodulation

Modulation

Modulation is defined as the process of varying some characteristics (amplitude, frequency or phase ) of a carrier wave in accordance to the amplitude of messaging signal or modulating signal, m(t). acircuit which provide modulation is called modulators.

Fig:- Basic diagram of modulation

Modulators converts:

1. Low frequency signal to a high frequency signal
2. A baseband signal into bandpass signal
3. A wideband signal into narrow- band signal.
• Demodulation

The process of recovering the original signal from the modulated wave is known as demodulation or detection. At the broadcasting station, modulation is done to transmit the audio signal over larger distances to a receiver. When the modulated wave is picked up by the radio receiver, it is necessary to recover the audio signal from it. This process is accomplished in the radio receiver and is called demodulation.

Author : Arusha Ahmed

## Frequently Asked Questions

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Ans: Communication is the process of sending, receiving, and processing of information from one point to another point through a communication channel by electronic means or electronic signals. It requires a source of information, a mode of encode the information so that it can be transmitted, a means of transmitting and receiving the information, and a means of decoding it. view more..
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Ans: Modulation is defined as the process of varying some characteristics (amplitude, frequency or phase ) of a carrier wave in accordance to the amplitude of messaging signal or modulating signal, m(t) view more..
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Ans: what is modulation and Need of modulation ,what is demodulation and need of demodulation, What is modulation and demodulation in a modem? To improve the quality of reception To increase the range of communication Need of demodulation The wireless signal consists of radio frequency (high frequency) carrier wave modulated by audio frequency (low frequency). view more..
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Ans: Application Of Fourier Transform In Communication systems Fourier transform is a mathematical tool that breaks a function, a signal or a waveform into an another representation which is characterized by sin and cosines. view more..

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