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.

2024年5月15日 · 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

2023年10月19日 · The main difference between AM and FM radio waves is that AM waves are amplitude modulated while FM waves are frequency modulated. AM waves are older and have a larger range, while FM waves have a smaller range but provide better sound quality.

FM is the modulation in which the instantaneous frequency of the carrier c(t) is varied linearly with message signal m(t). This means frequency of the carrier is changed according to amplitude of modulating signal.

The encoding of information in a carrier wave by modifying the wave’s instantaneous frequency is known as frequency modulation (FM). FM technology is frequently used in the fields of computing, telecommunications, and signal processing.

2020年9月3日 · 事实上AM及FM指的是无线电学上的二种不同调制方式。 AM: Amplitude Modulation称为调幅，而FM: Frequency Modulation称为调频。 只是一般中波广播 (MW: Medium Wave)采用了调幅 (AM)的方式，在不知不觉中，MW及AM之间就划上了等号。

Connect the FM output signal to the oscilloscope and observe the resulting waveforms as you vary the frequency deviation. Use the FFT function of the oscilloscope to observe the spectrum of the FM signal by performing the following steps:

2022年11月10日 · Between the instants 0 and t 1, the modulating signal is zero and the frequency of the FM wave equals the carrier frequency f c. At t 1, the modulating signals begin with its positive half cycle and the frequency of the modulated wave starts to increase.

Narrowband frequency modulation results in a translation of the spectrum of the integral of the baseband signal to a band surrounding the carrier frequency. An FM spectrum is influenced by the modulation index as well as by the ratio of the amplitude of the modulating signal to 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.