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Digital Communication

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Digital Communication

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Information is digital in today’s world but the physical world is still analog. Digital communication entails mapping digital information into electromagnetic energy (voltage waveforms) and transmitting over an appropriate physical medium (over a wire or wireless). At the receiver, we record the electromagnetic energy (voltage waveform again) and based on this knowledge, try to recover the original information bits. In the first lecture, we pointed out that for engineering convenience, the mapping between digital information and analog voltage waveforms is divided into two separate parts.

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