Signal Processing and Communications Group

IB Signal and Data Analysis: Pre-2009-10

Handouts and m-files

Handout 1 -- Introduction and Preliminaries

• angle grinder wav file


• alto flute wav file


• The Today Programme wav file

Handout 2 -- Fourier Series

• plotsinc.m -- illustrates the convergence of sinc(at) to a delta function as a tends to infinity

Handout 3 -- Fourier Transforms

• ftex1.m -- illustrates the convergence of the Fourier series coefficients to the Fourier transform as period gets larger (applied to double exponential function).


• Maths, Physics and Engineering Applets -- this page includes the applet showing how one can change the number and magnitude of Fourier series coefficients to change a given signal.


• gyroscope movie -- spinning gyroscope with microphone recording sound.


• gyroscope wav file -- can be analysed using Matlab or other programs (eg Goldwave)

Handout 4 -- Properties of the Fourier Transform

Handout 5 -- Sampling Theory

Handout 6 -- The Discrete Fourier Transform

• fftdata.m -- Matlab program to read in spirometer data and plot FFTs


• spirometer data (3 subjects) -- data1, data2, data3 contain flow vs time data.


• Audio file for Shepard tone -- illusion of continually decreasing pitch. Spectrogram reveals what is actually happening.

Quick Links

Group Overview

Group Contact

Group People

Group Students

Group Publications

Seminars