CSE3213_04_AnalogDigitalSignalsW2012 part 1

CSE3213_04_AnalogDigitalSignalsW2012 part 1 - Sender...

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1 Analog and Digital Signals, Time and Frequency Representation of Signals CSE 3213, Winter 2012 Instructor: Dusan Stevanovic Required reading: Garcia 3.1, 3.2
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2 Data vs. Signal Analog vs. Digital Analog Signals Simple Analog Signals Composite Analog Signals Digital Signals
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3 Data vs. Signal Data information formatted in human/machine readable form examples: voice , music , image , file Signal electric or electromagnetic representation of data transmission media work by conducting energy along a physical path; thus, to be transmitted, data must be turned into energy in the form of electro-magnetic signals Transmission communication of data through propagation and processing of signals Channel or Communication Medium Coding Receiver
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Unformatted text preview: Sender Decoding Signal Signal Data Data Idea, Feeling, Knowledge 4 Signal Representation Signal Representation – typically in 2D space, as a function of time , space or frequency when horizontal axis is time, graph displays the value of a signal at one particular point in space as a function of time when horizontal axis is space, graph displays the value of a signal at one particular point in time as a function of space time space The time- and space- representation of a signal often resemble each other, though the signal envelope in the space-representation is different (signal attenuates over distance). 5 Signal Representation (cont.) http://www.phy.ntnu.edu.tw/ntnujava/index.php?topic=35 Example [ signal in time and space ]...
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This note was uploaded on 02/14/2012 for the course CSE 3213 taught by Professor A during the Winter '10 term at York University.

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CSE3213_04_AnalogDigitalSignalsW2012 part 1 - Sender...

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