Howtosignalprocessing
- How many sidebands are there in FM?
- What produces the sidebands on FM?
- How does FM modulation work?
- How is the noise on an FM signal minimized at the receiver?
How many sidebands are there in FM?
Figure 7.9. Frequency modulation. Like AM, FM also produces sidebands. But unlike AM, which produces a single pair of sidebands for each frequency in the modulating signal, the FM process produces an infinite number of pairs of sidebands for each frequency in the information signal.
What produces the sidebands on FM?
In FM, a set of sidebands is produced around the carrier C, equally spaced at a distance equal to the modulating frequency M. Therefore, we often refer to the sidebands in pairs: 1st, 2nd, 3rd, and so on. The so-called upper sidebands are those lying above the carrier.
How does FM modulation work?
Frequency Modulation (FM) is a form of modulation in which changes in the carrier wave frequency correspond directly to changes in the baseband signal. FM is considered an analog form of modulation because the baseband signal is typically an analog waveform without discrete, digital values.
How is the noise on an FM signal minimized at the receiver?
Limiter circuit is used in FM receiver to remove the noise present in the peaks of the received signal and to remove any amplitude variation in the received signal; the output of the limiter has constant amplitude.
