CSE3213_05_AnalogDigitalTransmissionW2012_Part_1

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1 Digital vs. Analog Transmission Nyquist and Shannon Laws CSE 3213, Winter 2012 Instructor: Dusan Stevanovic Required reading: Garcia 3.1 to 3.5
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2 Transmission Impairments Transmission / Signal Impairments caused by imperfections of transmission media for analog signals , impairments can degrade signal quality for digital signals , impairments can cause bit errors main types of transmission impairments: Sent Received Sent Received s (noisy ) | p (air stopped) | ee (periodic) | t (stopped) | sh (noisy) 1 0 1 0 1 0 1 0 . . . t 1 ms
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3 Transmission Impairments: Attenuation Attenuation reduction / loss in signal power when a signal travels through a medium it loses some of its energy by overcoming the resistance of medium main challenges in combating attenuation: (1) received signal must have sufficient strength so that receiver can detect signal , but should not be too strong to overload transmitter/receiver circuitry (2) signal must maintain a level sufficiently higher than
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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_05_AnalogDigitalTransmissionW2012_Part_1 - 1...

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