ELEC 320 Class Notes, Fall 2004

August 30:

• Frequency Response (PDF file)
• Key Concepts in Signals & Systems (PDF file)

September 1 and 3:

• Bode Plots (PDF file)
• Demonstration of first-, second-, and third-order filters
  • Notes on filter order
  • Original music filx.au and filx.wav
  • First-order filter fily1.au and fily1.wav
  • Second-order filter fily2.au and fily2.wav
  • Third-order filter fily3.au and fily3.wav

September 6: Insights for filter design (PDF)

Guest lecture: Please attend the following lecture on Monday, September 13, at 3 PM.
Dr. Andrew Jones, "A concept for motion-compensated radiotherapy," in room Dana 113.

September 10: Classes of signals

September 15 and 17:

• Classes of systems
• System classification exercises

September 22: Solution to Exam 1

September 24: Class notes on Chapter 2

September 29: Steps in Computing Continuous-Time Convolution

October 4:Applications of convolution

• Head-related transfer function (HRTF)
  Original work at MIT
  Project at Rice
• Channel impulse response in digital communications

October 11: MATLAB/Simulink program fsgen.mdl to experiment with Fourier series. To run the program:

1. Download the file fsgen.mdl
2. Start Matlab
3. Type fsgen at the Matlab prompt
4. Under the Simulation menu, choose Start
5. Open the "slider gains" by double-clicking on them
6. Click the binocular icon on the plots to rescale the axes, if necessary
7. Try to build a square wave and a triangle wave

October 13, 15, and 18:

• Fourier series notes and notes from another textbook
• Examples of signal approximation
• Time and frequency domain notes
• Matlab program for truncated, trigonometric Fourier series: fstrun.m

October 20: Exam 2 and solution

October 22: Matlab program sqrfilt.m to find the response of a low-pass RC circuit with frequency response H(w) = 1 / (1 + j (w/w_c)) to a square wave using compact trigonometric Fourier series.

October 29: Matlab program for truncated, exponential Fourier series of triangle wave: fstrun_exp.m

November 3 and 5: Fourier transform notes, pages 1-4 and pages 5-6

November 8, 10, 12, and 15: Fourier transform applications

• Time-shift and scaling properties
• Linear, time-invariant systems
• Amplitude modulation (AM)
• Some exercises

November 17:

• Notes on sampling and reconstruction
• IEEE Bucknell Student Branch Lecture on Thursday, November 18

November 19: Solution to Exam 3 and link to histogram of scores

November 29:

• DVD audio FAQ
• Check out SampleMania at the Johns Hopkins demo page: http://www.jhu.edu/~signals/

December 1: Notes on Laplace transform:

• Introduction
• Tables
• Time-domain and s-domain, inverse Laplace transform

December 3:

• See Homework 17.
• See the newly-posted ABET outcomes for this course. Use it as a study guide for the final exam!
• Lab project presentation schedule for Monday, Dec. 6
• MATLAB commands for partial fraction expansion
• Matlab program to illustrate a pole: pole.m
• For Laplace transform applied to LTI systems:
  Check out Exploring the s-Plane at the Johns Hopkins demo page, http://www.jhu.edu/~signals/
• Laplace transform applied to linear systems
• Laplace transform, frequency response, and filter design