December 2005
Intermediate to advanced
475 pages
12h 6m
English
Content preview from Signals and Systems
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1.1 SIGNALS AND SYSTEMS
If a function represents a physical quantity or variable containing the information about the behaviour and nature of the phenomenon, it is known as a signal. Since a function is mathematically represented as a function of an independent variable, it is denoted by x (t). In a R–L circuit, the current through the resistor or voltage across the inductor is called a signal.
On the contrary, a device or a set of rules defining the functional relation between the input and output is known as a system.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.