Why do we need modulation?

Modulation is simply a widely used process in communication systems in which a very high-frequency carrier wave is used to transmit the low-frequency message signal so that the transmitted signal continues to have all the information contained in the original message signal.

1. Why do we need modulation and de modulation?
2. What is modulation and why it is necessary?
3. What is modulation explain the need for modulation?
4. Why is modulation necessary in electronic communication?
5. Why modulation demodulation is needed when transmitting data over a radio system?
6. What is the function of modulator?
7. What is modulation in simple words?
8. Why do we need a carrier signal?
9. Which technique uses modulation?
10. What is the need of modulation in analog communication?
11. What does modulation actually do to a message and carrier?
12. What is modulation in communication?
13. What is modulation in computer networks?
14. How does modulation help transmission?
15. How does modulation and demodulation work?
16. Why modulation technique is required to transmit a signal?

Why do we need modulation and de modulation?

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.

What is modulation and why it is necessary?

Modulation : The process of combining low frequency audio signal with high frequency carrier wave is called modulation . Necessary : Low frequency signals cannot transmit directly . To reduce size of the antenna and to avoid mixing up of signal from different transmitters modulation is necessary .

What is modulation explain the need for modulation?

Modulation is simply a widely used process in communication systems in which a very high-frequency carrier wave is used to transmit the low-frequency message signal so that the transmitted signal continues to have all the information contained in the original message signal.

Why is modulation necessary in electronic communication?

Modulation allows us to send a signal over a bandpass frequency range. If every signal gets its own frequency range, then we can transmit multiple signals simultaneously over a single channel, all using different frequency ranges. Another reason to modulate a signal is to allow the use of a smaller antenna.

Why modulation demodulation is needed when transmitting data over a radio system?

The modulated signal is then transmitted over a channel, after which the original information-bearing signal is recovered through a process of demodulation. ... In order to prevent mutual interference, each user's information signal is modulated onto an assigned carrier of a specific frequency.

What is the function of modulator?

A modulator is an electronic circuit that superimposes a low-frequency (information) signal onto a high-frequency (carrier) signal for the purpose of wireless transmission. The reason for this is that higher frequency signals can be received using shorter aerials, which are more practical than longer ones.

What is modulation in simple words?

Modulation is the act or process of giving a wave or signal the amplitude or frequency of another wave or signal. In telecommunications, modulation is the process of conveying a message signal, for example a digital bit stream or an analog audio signal, inside another signal that can be physically transmitted.

Why do we need a carrier signal?

It is used to carry signals from one location to another on the surface of earth. We need the carrier waves of high frequency for distant communication because high frequency carrier waves travel with the speed of light and do not require a material medium to propagate.

Which technique uses modulation?

Modulation techniques are roughly divided into four types: Analog modulation, Digital modulation, Pulse modulation , and Spread spectrum method. Analog modulation is typically used for AM, FM radio, and short-wave broadcasting. Digital modulation involves transmission of binary signals (0 and 1).

What is the need of modulation in analog communication?

For a signal to be transmitted to a distance, without the effect of any external interferences or noise addition and without getting faded away, it has to undergo a process called as Modulation. It improves the strength of the signal without disturbing the parameters of the original signal.

What does modulation actually do to a message and carrier?

This process of imposing an input signal onto a carrier wave is called modulation. In other words, modulation changes the shape of a carrier wave to somehow encode the speech or data information that we were interested in carrying. Modulation is like hiding a code inside the carrier wave.

What is modulation in communication?

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 is modulation in computer networks?

What is Modulation (in computer networking)? Modulation is the process by which information is encoded into electrical signals for transmission over a medium. Binary information, as represented by a series of 1s and 0s, must be converted to analog or digital electrical signals for transmission.

How does modulation help transmission?

Modulation is an extremely important process in the transmission of a signal. As the channel offers very high losses to low frequencies, transmitting a message signal directly decreases the range drastically. Hence, it is used to modulate a high frequency carrier wave and the modulated wave is transmitted.

How does modulation and demodulation work?

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. ... Electromagnetic interference can degrade signals and make the original signal impossible to extract.

Why modulation technique is required to transmit a signal?

The signals within 20 Hz to 20 kHz frequency range can travel only a few distances. To send the message signal, the length of the antenna should be a quarter wavelength of the used frequency. Thus, modulation is required to increase the frequency of the message signal and to enhance its strength to reach the receiver.