Question

Что такое демодуляция

Answer 1

Это процесс обратной модуляции колебаний,выделение информационного сигнала

Answer 2

Демодуляция- это процесс восстановления величин, вызвавших изменение параметров носителя при модуляции.

Answer 3

What is Demodulation?

Demodulation is the process of extracting the original information signal from a modulated carrier signal. In other words, it is the reverse process of modulation. Modulation is used to transmit information over a carrier signal by modifying certain characteristics of the carrier signal, such as its amplitude, frequency, or phase. Demodulation is necessary at the receiving end to recover the original information from the modulated carrier signal.

Types of Demodulation

There are several different types of demodulation techniques, depending on the modulation scheme used. Some common demodulation techniques include:

1. Amplitude Demodulation (AM Demodulation): This technique is used to recover the original amplitude-modulated signal from an amplitude-modulated carrier signal. It involves extracting the envelope of the modulated signal.

2. Frequency Demodulation (FM Demodulation): FM demodulation is used to recover the original frequency-modulated signal from a frequency-modulated carrier signal. It typically involves detecting changes in the carrier frequency.

3. Phase Demodulation (PM Demodulation): Phase demodulation is used to recover the original phase-modulated signal from a phase-modulated carrier signal. It involves measuring the phase shift of the carrier signal.

4. Quadrature Demodulation (QAM Demodulation): QAM demodulation is used to recover the original quadrature amplitude-modulated (QAM) signal from a QAM carrier signal. It involves separating the in-phase and quadrature components of the signal.

Applications of Demodulation

Demodulation is a fundamental process in various communication systems. It is used in radio broadcasting, television transmission, wireless communication, satellite communication, and many other applications where modulation is used to transmit information over a carrier signal. Demodulation allows the receiver to extract the original information signal, enabling the communication system to function effectively.

Conclusion

Demodulation is the process of extracting the original information signal from a modulated carrier signal. It is an essential step in communication systems that use modulation to transmit information. Different demodulation techniques are used depending on the modulation scheme employed.