Signal Representation

1.1    Introduction

We experience signals of various types almost on a continual basis in our daily life. The blowing of the wind is an example of a continuous wave. One can plot the strength of the wind wave as a function of time. We can plot the velocity of this same wave and the distance it travels as a function of time as well. When we speak, continuous signals are generated. These spoken word signals travel from one place to another so that another person can hear them. These are our familiar sound waves.

When a radar system detects a certain object in the sky, an electromagnetic signal is sent. This signal leaves the radar system and travels the distance in the air until it hits the target object, which ...

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