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Frequency modulation (FM) is the encoding of information in a carrier wave by varying the instantaneous frequency of the wave. The technology is used in telecommunications, radio broadcasting, signal processing, and computing.
Frequency Modulation or FM is a method of encoding information on one carrier wave by changing the wave carrier frequency. Learn more about frequency modulation, its application, advantages, disadvantages and more in this article
But we’re looking for frequency modulation, not phase modulation, so we want the excess frequency to be linearly proportional to the baseband signal. We know from the first page of this chapter that we can obtain frequency by taking the derivative, with respect to time, of phase.
The process of modulation in which the frequency of the carrier signal is changed according to the instantaneous magnitude of the modulating signal is known as frequency modulation.
Frequency modulation is a technique or a process of encoding information on a particular signal (analogue or digital) by varying the carrier wave frequency in accordance with the frequency of the modulating signal.
Definition: A category of angle modulation in which the frequency of the carrier wave is changed according to the amplitude of the message signal is known as frequency modulation. It is abbreviated as FM and is a widely used analog modulation technique.
In frequency modulation we modulate the frequency — "modulation" here is just a latinate word for "change". Vibrato and glissando are frequency modulation.
If the carrier frequency is much greater than the highest frequency in the message, AM with carrier can be demodulated with a peak detector. z(t) z(t) y(t) R C y(t) t. In AM radio, the highest frequency in the message is 5 kHz and the carrier frequency is between 500 kHz and 1500 kHz. This circuit is simple and inexpensive.
Frequency modulation is a widely used method of transmitting information through radio waves. Unlike amplitude modulation, which varies the strength of the signal to convey the data, frequency modulation alters the frequency of the carrier wave.
Frequency modulation is a form of analog angle modulation in which the baseband information-carrying signal, typically called the message or information signal m(t), varies the frequency of a carrier wave. Audio signals transmitted by FM radio communications are the most common.