IB Paper 7 - Signal and Data Analysis
Lecture notes available in .pdf format:
Handout 1 - Introductory Material
Handout 2 - Fourier Series
Handout 3 - Fourier Transforms
Handout 4 - Properties of Fourier Transforms
Handout 5 - Digital Sampling Theory
Handout 6 - The Discrete Fourier Transform