小石头工作室 . Stone Studio .

Resources:

Fast Convolution
Covers various implementations of linear convolution using the DFT, including Overlap-Add and Overlap-Save.
Upsampling vs. Oversampling for Digital Audio
An article about the benefits of these techniques.
The Scientist and Engineer’s Guide to Digital Signal Processing
A great practical introduction to DSP. (Free to download)
Information on Gibbs Phenomenon
Wikipedia article on it.

Articles on Sampling below the Nyquist Rate

Sampling [...]

Many Eyes [FREE]

Many Eyes is a bet on the power of human visual intelligence to find patterns. Jump right to our visualizations now, take a tour, or read on for a leisurely explanation of the project.
 
Tasty Data Goodies – Swivel  [Not Free]

Swivel is a website where people share reports of charts and numbers. Swivel is [...]

General DSP Central

dspGuru a lot of good free information on DSP was available, it covers Tutorials, HowTos, Tricks, and more.
TechOnline provides users with a host of education resources, which range from Webinars to online courses to a research library of white papers. At the same time, the site offers engineers the chance to evaluate products [...]

“Linear Phase” refers to the condition where the phase response of the filter is a linear (straight-line) function of frequency (excluding phase wraps at +/- 180 degrees). This results in the delay through the filter being the same at all frequencies. Therefore, the filter does not cause “phase distortion” or “delay distortion”. The lack of [...]

The Truth About the JFK Assassination. Signal Processing Tells The Story.
President John F Kennedy was assassinated in Dallas in November of 1963. Although an investigation soon concluded that only one gunman, Lee Harvey Oswald, shot at President Kennedy, there is a community of skeptics that exist to this day who think that there was [...]

Scilab/Scicos a very powerful alternative to Matlab/Simulink and is free!
Scilab is a free open-source software package for scientific computation. It includes hundreds of general purpose and specialized functions for numerical computation, organized in libraries called toolboxes, which cover such areas as simulation, optimization, systems and control, and signal processing. One important Scilab toolbox is [...]

Introduction: A layered view of digital communication
Course Features

Video lectures
Lecture notes
Assignments (no solutions)
Exams and Solutions

Course Description
The course serves as an introduction to the theory and practice behind many of today’s communications systems. 6.450 forms the first of a two-course sequence on digital communication. The second class, 6.451, is offered in the spring.
Topics covered include: digital [...]