DIGITAL DATA DIGITAL
SIGNAL ENCODING
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DIGITAL DATA DIGITAL SIGNAL ENCODING, Exams of Data Communication Systems and Computer Networks
DIGITAL DATA DIGITAL SIGNAL ENCODING.pptx
Typology: Exams
2016/2017
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DIGITAL DATA DIGITAL
SIGNAL ENCODING
(^) In this session, we see how we can represent digital data by using digital signals. The conversion involves three techniques: line coding, block coding, and scrambling. Line coding is always needed; block coding and scrambling may or may not be needed.
SIGNAL ELEMENT VERSUS DATA ELEMENT
EFFECT OF LACK OF SYNCHRONIZATION
UNIPOLAR NRZ SCHEME
CHARACTERISTICS OF UNIPOLAR
SIGNAL
(^) It uses only one polarity of voltage level (^) Bit rate is same as the data rate (^) DC component is present (^) Loss of synchronization for long sequences of 1’s and 0’s (^) Simple but obsolete