Contents
What is modulation and demodulation of data?
Modulation is the process of encoding information in a transmitted signal, while demodulation is the process of extracting information from the transmitted signal. A modem at the far end demodulates the audio signal to recover the data stream.
What is a demodulation technique?
The process of re-creating original modulating frequencies (intelligence) from the rf carrier is referred to as DEMODULATION or DETECTION. Each type of modulation is different and requires different techniques to recover (demodulate) the intelligence.
What is the need of demodulation?
The process of recovering the original signal from the modulated wave is known as demodulation or detection. 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 are the different methods of demodulation?
The methods considered are the lock-in amplifier, high-bandwidth lock-in amplifier, Lyapunov filter, Kalman filter, RMS-to-DC conversion (moving-average filter and mean absolute deviation computation), peak detector and coherent demodulator.
Where demodulation is done?
Answer: Demodulation is done in ______ a) Receiving antenna b) Transmitter c) Radio receiver d) Transmitting antenna. Demodulation is extracting the original information-bearing signal from a carrier wave.
What are the advantages of ask?
Advantages of ASK modulation ➨It offers high bandwidth efficiency. ➨It has simple receiver design. ➨ASK modulation can be used to transmit digital data over optical fiber. ➨ASK modulation and ASK demodulation processes are comparatively inexpensive.
What are the applications of AM?
Amplitude modulation is used in a variety of applications….Amplitude modulation applications
- Broadcast transmissions: AM is still widely used for broadcasting on the long, medium and short wave bands.
- Air band radio: VHF transmissions for many airborne applications still use AM. .