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.

調頻 （英語： Frequency Modulation，縮寫： FM）是一種以 載波 的瞬時 頻率 變化來表示資訊的 調變 方式。 （與此相對應的 調幅 方式是透過載波振幅的變化來表示資訊，而其頻率卻保持不變。 ）在 類比 應用中，載波的頻率跟隨輸入訊號的振幅直接成等比例變化。 在 數位 應用領域，載波的頻率則根據 數據 序列的值作離散跳變，即所謂的 頻率鍵控 （FSK）。 調頻技術通常運用在 甚高頻 段（VHF 無線電波段）上的 高傳真 音樂 和 語音 的 無線電廣播。 普通的（類比）電視的 …

2024年5月15日 · Frequency Modulation is a process of encoding information on one carrier wave by changing its frequency. The frequency of the carrier wave is changed according to the frequency of the modulating signal. Frequency modulation is …

We can, of course, use FM (or anything) to produce the modulating signal. When FM is used, it is sometimes called "cascade FM": In CLM: (* A (oscil carrier (* B (oscil modulator (* C (oscil cascade))))) Each component of the lower pair of oscillators is surrounded by the spectrum produced by the upper pair, sort of like a set of formant regions.

What is a Frequency Modulation? The frequency modulation can be defined as; the frequency of the carrier signal is varied proportional to (in accordance with) the Amplitude of the input modulating signal. The input is a single tone sine wave. The carrier and the FM waveforms also are shown in the following figure.

With FM, it is the spectrum of the integral of the baseband signal that appears in the band surrounding the carrier frequency. For the single-baseband-frequency, m-equals-1 modulation shown above, we have the following:

调频（英语：Frequency Modulation，缩写：FM）是一种以载波的瞬时频率变化来表示信息的方式。 （与此相对应的调幅方式是透过载波幅度的变化来表示信息，而其频率却保持不变。

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.

Frequency Modulation is a method of signal communication where information is transmitted by varying the instantaneous frequency of a signal. It is more resilient to noise and interference compared to amplitude modulation. You might find these chapters and articles relevant to …