EE200_Weber_8-28

EE200_Weber_8-28 - EE 200 Systems Systems transform signals...

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1 EE 200 Systems Systems transform signals Convert to form usable by other systems Modems change signal to form suitable for transmission Filters: extract one part, reduce another part Encrypt & decrypt State machines: respond to signals and take some action
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2 EE 200 The domain and range of a system are “signal spaces” A system maps one signal space into another signal space Example: a microphone (Z) has audio signals (air pressure) that vary over time as input x: Reals Pressure and time varying electrical voltages as output y: Reals Voltage y(t) = Z(x(t)) Z: [Reals Pressure] [Reals Voltage] Systems are functions
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3 EE 200 Functions For each member of set X (the domain), the function assigns a value in set Y (the range) f: X Y Define the function by Declarative statement Graph Table Procedure for finding values Composition of other functions
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4 EE 200 Declarative vs. Imperative Declarative definition: Shows relationship between input and output signals Imperative definition:
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