EE200_Weber_8-26

EE200_Weber_8-26 - EE 200 Systems Systems transform signals...

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5 EE 200 Systems • Systems transform signals Convert signals in one form to something usable by other systems • Modems change binary signals to a form suitable for transmission over phone lines • Filters extract one part of the input signal, reduce another part • State machines: respond to signals and take some action
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6 EE 200 • Systems are represented by functions • The domain and range of a system are “signal spaces” • Maps one signal space into another signal space Example: a microphone changes audio signals into electrical signals. Systems Sound (variations in air pressure) Electricity (variations in voltage)
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7 EE 200 • We can define the function in a variety of ways Declarative assignment Graphs Tables • Which one we use depends on the function being defined. Systems
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8 EE 200 Systems • Output of the system is a composition of functions. • Input signal x(t) is transformed into output signal y(t) Elements from the signal space of x are transformed into elements from the signal space of y y ( t ) = T ( x ( t )) T x(t) y(t)
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This note was uploaded on 10/13/2009 for the course EE 200 at USC.

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EE200_Weber_8-26 - EE 200 Systems Systems transform signals...

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