4/14/2008

Story of Digital Communication~what I learnd from Prof. Viswanath

the story is from basic digital communication(Digi. Comm.) scheme to complex modern ones
for each scheme, we focus on
two resources:
  1. power
  2. spectrum
two performances criterias(conditions)
  1. data rate
  2. error rate(reliability)
there are three basic elements in Digi. Comm.
  1. transmitter(Tx)
  2. receiver(Rx)
  3. channel
the backbone of this story is constitute by three Channels
Additive Noise Channel, Wireline Channel and Wireless Channnel

A. Additive Noise Channel
# Sequential Comm.

# Block Comm.

# modulation(mod.) and demodulation(demod.)

# coding and decoding

B. Wireline Channel
# Inter Symbol Interference(ISI)

# Othogonal Frequency Division Multiplexing(OFDM)

C. Wireless Channel
# baseband and passband

# fading channel

# diversity

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