The webdemo system is a joint effort of dozens of researchers and students. It offers hands-on experience with various methods and algorithms from communications engineering using a simple web browser.


To gain a deeper insight and understanding of the topics dealt with in the lectures, we are offering Webdemos: An interactive simulation tools which can be displayed in a web browser. A complete list of all Webdemos and their associated lectures can be found below:

Transmission Line X X          
Huffman-Coding X X          
Entropy X X         X
Mutual information X X         X
Modal Dispersion       X      
Chromatic Dispersion       X      
Coherent Optical Transmission       X      
Amplified fiber link       X      
Path Loss Models         X X  
Pulse Shaping X X X X X X  
Soft-Demapping       X X  
Mach-Zehnder Modulator       X      
Rayleigh Fading         X    
Tapped-Delay Line Channel Model         X    
Physical Layer Performance Measures  X X X X X   X
Diversity Combining         X X  
Channel Equalizers         X    
Equalization using the Viterbi Algorithm         X    
QAM - constellation diagram from given SNR value  X X X   X    
Sampling of analog signals     X        
LDPC Degree Distribution Optimization             X
Quantization of continuous-valued signals (draft)     X   X    
Modulation X X X        
Soliton Impulses       X      


Student Theses

Webdemos emerging from former student theses projects:

Webdemos emerging from former Student Theses Projects:

Correlation Sequences in Communications         X    
Channel Coding X X     X   X
Peeling Decoder for Graph Based Codes         X   X
Exit Charts for LDPC Codes         X   X
EXIT Charts for Turbo Codes         X   X
Channel Estimation for Fading Channels         X    
Wireless Cellular Systems         X    
OFDM over Multipath Channels     X    X    
Single Carrier vs. Multi Carrier Modulation         X    
Single Carrier Equalizer         X    
Digital Infinite Impulse Response Filters X X X X      
802.11 WLAN spectrum analysis      X   X    
MIMO Channel Capacity           X  
Channel Estimation for Time and Frequency Selective Channels X X     X    
Channel Characteristics of Transmission Lines X X     X    
Spectral Shaping of OFDM Signals X X X   X    
LDPC Codes from Communication Standards X X         X
802.11n WLAN channel model         X X  
MIMO Sphere Detector           X  
MIMO Detection Algorithms           X  

Invited Webdemos

Webdemos from leading scientist around the world:

Topic fundamental wireless optical wireline
RateX Transceiver Demonstrator  X      


Webdemos emerging from ongoing research:

Topic fundamental wireless optical wireline
AWGN Channel Capacity with various constraints  X      
Multicarrier waveforms for 5G   X    
Spatially Coupled LDPC Codes X      
Massive MIMO   X    
On-the-fly LDPC Code BER simulations on a GPU platform X      
Polar Codes X      
On-the-fly Polar Code BER simulations on a GPU platform X      
Massive MIMO Channel Modeling   X    


X Webdemo is related to this lecture
X Webdemo is also of interest for this lecture
NT II Nachrichtentechnik II
Com Communications (INFOTECH)
ÜT I Übertragungstechnik I / Communications I
ÜT II Übertragungstechnik II / Communications II
ÜT III Übertragungstechnik III / Communications III
STWC Space Time Wireless Communications
IT Information Theory

The Webdemo scripts are written for GNU Octave which is open source. The Webdemos are executed on our web-servers; thus, you will only need to install Octave if you intend to download the source code of the demos and run them locally on your own computer. As Octave's syntax is widely compatible to MATLAB, the Webdemos can in principle be executed with MATLAB as well. Students of the University of Stuttgart can get a free MATLAB licence from the TIK.