This applets illustrates graphically the concept of complex multiplication. As one can easily see, the multiplication of two complex numbers can be performed graphically by multiplying both modules and adding the phase angles.

## Sunday, October 28, 2012

## Saturday, October 27, 2012

### Sampling and aliasing

This applet illustrates, in a very simple way, the concept of aliasing. If the sampling frequency is inadequate, the reconstructed signal will be completely erroneous, as can be seen, for example, in the initial setup.

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