CSE3213_05_AnalogDigitalTransmissionW2012_Part_7

CSE3213_05_AnalogDigitalTransmissionW2012_Part_7 - Data...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
31 Data Rate Limits in Digital Transmission depends on three factors: bandwidth available # of levels in digital signal quality of channel level of noise Max Data Rate [bps] Over a Channel? T Nyquist Theorem defines theoretical max bit rate in noiseless channel [1924] even perfect (noiseless) channels have limited capacity Shannon Theorem Nyquist Theorem extended [1949]– defines theoretical max bit rate in noisy channel if random noise is present, situation deteriorates rapidly!
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
32 Data Rate Limits: Nyquist Theorem Intersymbol Interference the inevitable filtering effect of any practical channel will cause spreading of individual data symbols that pass through the channel this spreading causes part of symbol energy to overlap with neighbouring symbols causing intersymbol interference (ISI) ISI can significantly degrade the ability of the data detector to differentiate a current symbol from the diffused energy of adjacent symbols T s = 1/2B narrow pulse
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

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.

Page1 / 5

CSE3213_05_AnalogDigitalTransmissionW2012_Part_7 - Data...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online