Digital signal processing, foundations of communications engineering and physical layer communication techniques.
Illustrative explanation instead of boring math
Python code for all examples
Get the code and play around on your own
Refer to an introduction for a site overview and how to setup the coding environment.
Numerical calculations and sound samples about prime numbers and Riemann's prime-generating function.
(12671 times read)
Description of the most popular OFDM synchronization algorithm.
(37290 times read)
Introduction to use your soundcard as a software-defined radio
(27626 times read)
Explaining OFDM from the continuous-time standpoint, without FFT/IFFT.
(17489 times read)
How can you recognize a linear, a causal and a time-invariant system?
(143855 times read)
The three different representations of the Fourier Series and how they lead to the Fourier Transform.
(29905 times read)
Listen to the sound of a saxophone and describe it mathematically.
(22051 times read)
Fundamental Fourier: Expansion of periodic functions into sums of sines and cosines.
(60741 times read)
Illustrations on the Convolution Theorem and how it can be practically applied.
(73658 times read)
Explanation on the causes of multipath propagation and illustrating their effects on audio samples.
(14972 times read)
Explanation on why the cyclic prefix (CP) is used in an OFDM system.
(68131 times read)
We illustrate the effect of quantization noise in terms of audio samples.
(20317 times read)
Pictorial description of the operation of circular convolution.
(40353 times read)
What does a quantizer do, what is quantization noise and how do we calculate it?
(30598 times read)
Complete walkthrough of a digital transmission chain including AD/DA conversion and up/downconversion
(67317 times read)
This article explains the convolution operation with the help of animated graphs.
(72802 times read)
Explanation of Aliasing, how it sounds and what the anti-Aliasing filter does.
(26660 times read)
Explanation of the terms group delay and phase delay with an example of a bandpass RLC filter.
(52331 times read)
Explanation why dB conversion sometimes uses factor 10 and sometimes factor 20.
(119680 times read)
Illustration of a basic OFDM example including channel estimation for OFDM.
(89700 times read)
How to create an eye diagram and check for the first and second Nyquist criterion.
(24932 times read)
We derive and illustrate the special properties of the DFT due to its discrete nature including an audio example.
(82497 times read)
Time and frequency properties of the Dirac Comb
(62297 times read)
Understand, how the continuous-time Fourier Transform and discrete Fourier Transform are related
(24779 times read)
Linearity, Time-shift and Modulation property of the Fourier Transform
(55222 times read)
Understanding the first Nyquist criterion and its implications.
(18811 times read)
Motivation for this resource and setting up the coding environment
(25839 times read)