[Edit][History] last modified may 5
Source records: Amazon.com
Library MARC record
Language: English
ISBN 10: 0387225757
ISBN 13: 9780387225753
description
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First sentence: The physical layer of digital communications includes mapping of digital input information into a waveform for transmission over a communication channel and mapping of the received waveform into digital information that hopefully agrees with the original input since the communication channel may introduce various forms of distortion as well as noise [3].

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