**August 28:**
Frequency Response (PDF file)

**August 30:**

**September 1:**
Guest lecture by Prof. Boncelet

**September 4:**

- News story related to steganography
- Demonstration of first-, second-, and third-order filters
- Insights for filter design (PDF)

**September 11 and 13:**

- Classes of signals
- Illustration of sampling and analog vs. digital signals
- Audio of 3 cars passing microphone

**September 15:**
Signal Operation Examples

**September 18 and 20:**

**September 22:**
Possible Topics for Exam 1

**September 27:**
Solution to Exam 1

**September 29:**

**October 2 and 4:**
Convolution Exercises

**October 6:**
Matlab program
solutions to Lab 3
(lab3_sol.m)
and Homework 7
(hw7_sol.m)

**October 9:**Applications of convolution

- Optical illustion
- The
**Joy of Convolution**applet at`http://www.jhu.edu/~signals/` - Head-related transfer function (HRTF)

Original work at MIT and documentation

Project at Rice - Channel impulse response in digital communications

**October 18:**

- MATLAB/Simulink program
fsgen.mdl
to experiment with Fourier series.
To run the program:
- Download the file fsgen.mdl
- Start Matlab
- Type
`fsgen`at the Matlab prompt - Under the
`Simulation`menu, choose`Start` - Open the "slider gains" by double-clicking on them
- Click the binocular icon on the plots to rescale the axes, if necessary
- Try to build a square wave and a triangle wave

- Time domain and frequency domain for signals

**October 20:**
Fourier series notes

**October 25:**
Solution to Exam 2

**October 27, 30, and November 1, 3, 6, 8:**

- Fourier series (FS) notes
- Examples of signal approximation
- Matlab program for truncated, trigonometric Fourier series: fstrun.m
- The
**Fourier Series Approximation**applet at`http://www.jhu.edu/~signals/` - 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. - Matlab program for truncated, exponential Fourier series of triangle wave: fstrun_exp.m
- FS notes from another textbook

**November 1:**
IEEE Antennas and Propagation Society
Undergraduate / Graduate Research Awards for 2006-7

**November 10:**
Fourier transform notes,
pages 1-4 and
pages 5-6

**November 17:**
Solution to Exam 3

**November 20:**
Fourier transform applications

**November 27 and December 1:**

- Class and lab schedule for Nov. 20 - Dec. 4 (emailed on Nov. 15)
- IEEE Talk: Nov. 27, 12-1, Dana 117
- Lab project update:
- Project titles and abstracts (please send your project info!)
- Guidelines on the project presentation, report, and schedule

- Some Fourier transform exercises
- Notes on sampling and reconstruction
- Check out
*SampleMania*at the Johns Hopkins demo page:`http://www.jhu.edu/~signals/`

**December 4:**

- See the revised ABET outcomes for this course. Use it as a study guide for the final exam!
- Lab project presentation schedule for Monday, Dec. 4
- Sampling illustration