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Data Encoding Techniques - WPI

Physical Layer Part 2 data Encoding TechniquesNetworks: data Encoding1 Analog and Digital TransmissionsFigure use of both analog and digital transmissions for a computer to computer call. Conversion is done by the modemsand : data Encoding2 data Encoding Techniques Digital data , Analog Signals [modem] Digital data , Digital Signals [wired LAN] Analog data , Digital Signals [codec] Frequency Division Multiplexing (FDM) Wave Division Multiplexing (WDM) [fiber] Time Division Multiplexing (TDM) Pulse Code Modulation (PCM) [T1] Delta ModulationNetworks: data Encoding3 Digital data , Analog Signals[Example modem] Basis for analog signaling is a continuous, constant-frequency signal known as thecarrier frequency.

Note – the coding is the opposite convention from NRZI. Used in 802.5 (token ring) with twisted pair. * Modulation rate for Manchester and Differential Manchester is twice the data rate Îinefficient encoding for long-distance applications. 1 Ùabsence of transition at …

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