Why should we use DSP ?

a) Versatility :

> Digital Systems can be reprogrammed.

> Digital Systems can be ported to different hardware.

b) Repeatability :

> Digital systems can be easily duplicated.

> Digital systems do not depend on strict component  tolerances.

> Digital system responses do not drift with temperature.

c) Simplicity :

> Some things can be done more easily digitally than with analogue systems.

Some common features :

> They use a lot of maths (multiplying and adding signals).

> They deal with signals that come from the real world.