Frequency Modulation Demodulation
Frequency Modulation Demodulation is the process of extracting the original information usually an audio signal from a modulated FM carrier wave. Demodulation is an important step in FM receivers to recover the transmitted information accurately. The goal of FM modulation is to reproduce the original information encoded in the FM signal, ensuring high-quality audio output.
Frequency Modulation Waveform
Frequency Modulation generates a modulated waveform by changing the frequency of a carrier signal in response to change in the amplitude of a modulating signal. The result is s waveform that has characteristic distinct from the original carrier wave. The shape of the waveform is highly dependent on the characteristic of the modulating signal and the specific parameters of the FM modulation process.
The wave form of frequency modulation signal is shown in the image added below,
Frequencies in Frequency Modulation
In Frequency Modulation, the frequency of the carrier signal is varied in accordance with the instantaneous amplitude of the modulating signal. The parameters associated with FM are carrier frequency, Modulating Signal Frequency, Frequency deviation, Modulation index, Sideband Frequencies and Total Bandwidth. The expression for the instantaneous frequency can be expressed mathematically based on the modulation index, the frequency deviation and the modulating signal.
Frequency Modulation
Frequency Modulation or FM is a method of encoding information on one carrier wave by changing the wave carrier frequency. Frequency Modulation technology is used in the fields of computing, telecommunications, and signal processing. In frequency modulation, the frequency of the carrier wave is changed according to the frequency of the modulating signal.
In this article, we will discuss the definition of frequency modulation, its advantages and disadvantages, the modulation index, the differences between AM and FM, and the expressions for frequency modulation.
Table of Content
- What is Frequency Modulation?
- Frequency Modulation Deviation
- Frequency Modulation Demodulation
- Application of Frequency Modulation
- Modulation Index
- Difference between FM and AM