ELEC 470 Demonstrations and Class Notes, Spring 2004

January 22: Analog versus digital communication systems:
Examples and basic ideas (PowerPoint file)

January 27:

• More on analog vs. digital communication systems
  (from R.E. Ziemer and R.L. Peterson, Introduction to Digital Communication (Second Edition), Prentice-Hall, 2001)
• Some links about Claude Shannon, the father of information theory
  • Short biographies: #1 and #2
  • Read Shannon's classic 1948 paper, or click here for a PDF file
  • Death in February, 2001
• V.90 (Telephone) Modem Standard
• Matlab program for channel capacity of telephone line: modemcap_tel.m

January 29:

• Multiple access methods (PowerPoint file)
• Matlab program for a simple blind multiuser detector for CDMA: blind_mu.m

February 10 and 12:

• Notes on Vectors, Signals, and Fourier series
• Examples of signal approximation

February 17:

• Matlab demo of Fourier series fsdemo.m
• Notes on Fourier transform

February 19: Notes on DFT and FFT

February 26: Data file for FFT quiz

March 4 and 6: Simulink programs for amplitude modulation

• am_env.mdl: Demodulate AM with envelope detector using RC filter.
• am_env_filt.mdl: Demodulate AM with envelope detector using higher-order filter.
• dsb_coh.mdl: Double sideband - suppressed carrier (DSB-SC) with coherent demodulation.

March 6: Notes on QAM

March 11: Notes on Hilbert transform and SSB

March 12: Special Topic Report topics

March 23:

• Notes on Costas loop

• DSB-SC demodulation using Costas phase-locked loop:

  Download the programs costas_init.m and costas_demo.mdl
  Start Matlab, and type costas_init followed by costas_demo at the Matlab prompt.

• Notes on superhet receiver

April 22: Notes on sampling and reconstruction