Webdemos

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.

"In theory, there is no difference between theory and practice. But, in practice, there is." ― Yogi Berra

Lectures

A complete list of all Webdemos and their associated lectures can be found below:

Topic NT II Com ÜT I Com II Com III STWC IT
Entropy X X         X
Mutual information X X         X
Huffman-Coding X X         X
Normal Distribution X X X X X    
Introduction to Channel Coding X X     X   X
Pulse Shaping X X X X X X  
Modulation X X X        
QAM - constellation diagram from given SNR value X X X   X    
Physical Layer Performance Measures X X X X X   X
Digital Subscriber Line (DSL) X X          
Transmission Line X X          
Sampling of analog signals     X        
Quantization of continuous-valued signals     X   X    
OFDM over Multipath Channels     X   X    
Modal Dispersion       X      
Chromatic Dispersion       X      
Amplified fiber link       X      
Soliton Impulses on Optical Fibers       X      
Atmospheric Turbulences in Free-Space Optical Links       X
      
Coherent Optical Transmission       X      
Mach-Zehnder Modulator       X      
Path Loss Models         X X  
Rayleigh Fading         X    
Tapped-Delay Line Channel Model         X    
Soft-Demapping         X   X 
Diversity Combining         X X  
Channel Equalizers         X    
Equalization using the Viterbi Algorithm         X    
LDPC Degree Distribution Optimization             X

 

Student Theses

Webdemos emerging from former student theses projects:

Topic NT II Com ÜT I Com II Com III STWC IT
Lempel-Ziv Compression X X         X
Channel Coding X X         X
Trellises in Error Control Coding X X         X
Peeling Decoder for Graph Based Codes X X         X
LDPC Codes from Communication Standards X X         X
EXIT Charts for LDPC Codes X X         X
EXIT Charts for Turbo Codes X X         X
Digital Infinite Impulse Response Filters X X X X X    
Channel Characteristics of Transmission Lines X X     X    
Channel Estimation for Time and Frequency Selective Channels     X   X    
Single Carrier vs. Multi Carrier Modulation     X   X    
Spectral Shaping of OFDM Signals     X   X    
802.11 WLAN spectrum analysis     X   X    
802.11n WLAN channel model         X X  
Channel Estimation for Fading Channels         X   X
Correlation Sequences in Communications         X    
Single Carrier Equalizer         X    
Wireless Cellular Systems         X    
MIMO Channel Capacity           X  
MIMO Sphere Detector           X  
MIMO Detection Algorithms           X  
Channel Equalizers for OFDM Systems         X    

Invited Webdemos

Webdemos from leading scientist around the world:

Topic fundamental wireless optical wireline
RateX Transceiver Demonstrator  X      

Research

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      
5G LDPC Codes X X    
Massive MIMO Channel Modeling   X    

About

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
Com II Übertragungstechnik II / Communications II
Com 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.

An automatically generated list of all available webdemos is available here.

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