Satellite Communication

“Why Frequency Modulation scheme used in Satellite Communication? “



Answer: If we compare analog frequency modulation (FM) with analog amplitude modulation (AM), the FM better performance is due to the fact that the signal to noise ratio at the demodulator output is higher for wideband FM than for AM. For the transmission of a television signal over a satellite, the amplitude modulation would be severely affected by losses, various forms of interference, and nonlinearities in the transponder. By the other hand frequency modulation is also more robust against signal amplitude fading phenomena.

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