what is modulation and demodulation
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Answer:
Demodulation is extracting the original information-bearing signal from a carrier wave. A demodulator is an electronic circuit that is used to recover the information content from the modulated carrier wave. There are many types of modulation so there are many types of demodulators
In electronics and telecommunications, modulation is the process of varying one or more properties of a periodic waveform, called the carrier signal, with a modulating signal that typically contains information to be transmitted
Modulation is the process of influencing data information on the carrier, while demodulation is the recovery of original information at the distant end from the carrier. A modem is an equipment that performs both modulation and demodulation.