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What is modulation and demodulation?

What is modulation and demodulation?

Modulation and demodulation Modulation is the process of encoding information in a transmitted signal, while demodulation is the process of extracting information from the transmitted signal. Many factors influence how faithfully the extracted information replicates the original input information.

Why modulation and demodulation is important?

Modulation is very important step in the transmission of signal. Our message signal is generally a low frequency signal and path loss of signal is proportional to the square of the wavelength (and hence inversely proportional to the square of the frequency).

What is modulation and its type?

Modulation is the process of converting data into electrical signals optimized for transmission. Modulation techniques are roughly divided into four types: Analog modulation, Digital modulation, Pulse modulation , and Spread spectrum method.

What is modulation and demodulation in telecommunication?

– In a communication system modulation is done at the transmitter side. Whereas Demodulation is done at the receiver side of a communication system. In demodulation, the combination of carrier and message signal are separated from each other, to have an original information signal.

What do you mean by demodulation?

The process of separating the original information or SIGNAL from the MODULATED CARRIER. In the case of AMPLITUDE or FREQUENCY MODULATION it involves a device, called a demodulator or detector, which produces a signal corresponding to the instantaneous changes in amplitude or frequency, respectively.

What is demodulation Mcq?

Demodulation is the process of transmitting data information in the decoded form, over a carrier. Demodulation is the process of extracting data information in the decoded form, over a carrier. Both A and B.

What is modem explain modulation and demodulation working process by the modem?

Short for modulator/demodulator, a modem is a hardware device that allows a computer to send and receive information over telephone lines. When sending a signal, the device converts (“modulates”) digital data to an analog audio signal, and transmits it over a telephone line.

What is the SI unit of modulation index?

β= Δf/fm. β occurs as the part of phase of the carrier. Since it is a ratio ,it can be given the unit radians. radian does not have any dimensions whatsoever.

What is modulation Byjus?

The amplitude of the baseband signal is transferred to the high-frequency carrier. Therefore, modulation can be defined as, The process of superimposing a low-frequency signal on a high-frequency carrier signal. or, The process of varying the RF carrier wave in accordance with the information in a low-frequency signal.

What are the disadvantages of modulation?

Require very large bandwidth compare to PAM

  • A system has highest in complexity to implement
  • Highly sensitive to multi-pathway interference
  • Both devices are synchronized or differential pulse position modulation (PPM) is used

    • What is modulation and what is the aim of modulation?

    This process is called modulation. Modulation may be defined as the process of changing some characteristics like amplitude, frequency or phase of a carrier wave in accordance with the intensity of the signal is known as modulation. The purpose of a communication system is to transmit information or message signals.

    What is the difference between modulation and multiplexing?

    Modulation is using a career signal to send information,whereas multiplexing is a way of combining multiple signals.

  • In modulation wave properties are varied in order to represent the signal,whereas in multiplexing wave parameters are shared for multiple channels.
  • Usually,modulation is done after multiplexing.

    • What does demodulation mean?

    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.