Applets to "Signal Representation"

1.   Discrete Fouriertransform and Inverse
2.   Frequency & Impulse Responses  
3.   Graphical Convolution
4.   Period Duration of Periodic Signals
5.   Physical Signal & Analytic Signal
6.   Physical Signal & Equivalent Low-pass Signal
7.   Pulses and Spectra
8.   Sampling of Analog Signals and Signal Reconstruction

$\text{Some hints and tips about the HTML5/JS applets:}$ 

• After selecting the desired applet, a Wiki description page appears with a short summary of the content and an user interface.  At the beginning and end of this description page there are links to the actual HTML5 applet.
• The HTML5/JS applets can be rendered by many browsers such as Firefox, Chrome and Safari, as well as smartphones and tablets.
• The exercises and the solutions are integrated into the applet.