What is the difference between modulation and demodulation

Therefore, the message signal or the information signal combines with a high-frequency signal called the carrier signal without affecting its original characteristics. This process of combining the message signal with the carrier signal is called the modulation. The demodulation process occurs at the receiving end.

Overview and Key Difference 2. What is Modulation 3. What is Demodulation 4. Modulation is the process of putting the information that we need to transfer into a carrier signal. There are various types of modulation.

In Amplitude Modulation AM the amplitude of the carrier signal varies according to the amplitude of the message signal. Frequency Modulation FM changes the carrier signal frequency according to the message signal. Phase Modulation PM changes the carrier phase according to the message signal. These characteristics can be amplitude, frequency or phase. Basically, it is assumed that the information signal is a low-frequency one and thus needs conversion from low to high in order to have a better transmission.

Now the thing that strikes our mind is how to achieve this, and the answer is with the carrier wave. A carrier wave is a high-frequency signal that has constant amplitude and frequency and is generated from a radio frequency oscillator. These are used to modulate the original signal that contains information and has to be transmitted. It is sometimes referred to as an empty signal as it is an informationless signal.

Simply transmitting a baseband signal message signal to longer distances causes various unwanted alterations in the signal itself. There exist several unwanted parameters that unknowingly causes variation in the message signal. Thus, to avoid this, modulation is performed. Here as we can see that message signal also known as modulating signal is fed to the modulator. At the same time, a high-frequency carrier signal is also applied to the modulator whose characteristics are to be varied.

Resultantly, a modulated signal is achieved at the output of the modulator. Siddiq Zayeda Jan 17, Modulation is the process of influencing data information on the carrier, while demodulation is the recovery of original information at the distant end from the carrier. Modem is the equipment that performs both modulation and demodulation This discussion on Difference between modulation and demodulation in computer?

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Interview Difference between modulation B Answered by Bharath Ramtenky more than 6 months ago The key difference between modulation and demodulation is that modulation is to transfer the message signal by adding it with the carrier signal while demodulation is the process of filtering out the actual message signal from the carrier signal. S Answered by Sangita more than 6 months ago The key difference between modulation and demodulation is that modulation is to transfer the message signal by adding it with the carrier signal while demodulation is the process of filtering out the actual the actual message signal from the carrier signal.

D Answered by Dhiman Kakati more than 6 months ago Modulation is the process of changing the characteristics i. Show More Answers Similar questions. How to manage company 14 Answers 4 Upvotes Views.

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