What is amplitude modulation simple definition?

Definition of amplitude modulation : modulation of the amplitude of a radio carrier wave in accordance with the strength of the audio or other signal also : a broadcasting system using such modulation — compare frequency modulation.

What is amplitude modulation and demodulation?

Demodulation is a key process in the reception of any amplitude modulated signals whether used for broadcast or two way radio communication systems. Demodulation is the process by which the original information bearing signal, i.e. the modulation is extracted from the incoming overall received signal.

What is relation between frequency and amplitude?

The relationship between the wave’s amplitude and frequency is such that it is inversely proportional to the frequency. The amplitude decreases as the frequency increases.

What is amplitude modulation Wikipedia?

Amplitude modulation (AM) is a form of modulation in which the amplitude of a carrier wave is varied in direct proportion to that of a modulating signal. (Contrast this with frequency modulation, in which the frequency of the carrier is varied; and phase modulation, in which the phase is varied.)

What is amplitude modulation equation?

Am and Ac are the amplitude of the modulating signal and the carrier signal respectively. fm and fc are the frequency of the modulating signal and the carrier signal respectively. Then, the equation of Amplitude Modulated wave will be. s(t)=[Ac+Amcos(2πfmt)]cos(2πfct) (Equation 1)

What is unit of amplitude?

SI unit of amplitude is metre (m) as amplitude is the maximum displacement suffered by the particles of the medium from their mean positions during the wave propagation. SI unit of displacement is metre. so, SI unit of amplitude is metre.

What is the process of demodulation?

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.

Why is demodulation necessary?

Need of demodulation The diaphragm of a telephone receiver or a loud speaker cannot vibrate with high frequency. Moreover, this frequency is beyond the audible range of human ear. So, it is necessary to separate the audio frequencies from radio- frequency carrier waves.

What is amplitude and wavelength?

Wavelength and Amplitude. Amplitude: The height of a wave. Wavelength: The distance between adjacent crests. Trough: The lowest point of a wave. Crest: The highest point of a wave.