Lecture1

Lecture1 - INTRODUCTION E lectrical and Computer E...

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INTRODUCTION
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Electrical and Computer Engineering Concerned with solving problems of two types: Production or transmission of power. Transmission or processing of information Communication Systems Designers deal with the transmission of information.
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Electrical and Computer Engineering Electric Energy Systems and Communication Systems have Markedly different sets of constraints. Electric Energy Systems deal with known waveforms and one is concerned with designing the system for minimum energy loss. Communication Systems deal with unknown waveforms and try to overcome the problems of noise interference.
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Main concerns of the Communication System Designers Selection of the information-bearing waveform Bandwidth and power of the waveform Effect of System Noise on the received information Cost of the System
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Digital and Analog Sources and Systems A digital information source produces a finite set of possible messages An analog information source produces messages that are defined on a continuum. A digital communication system transfers information from a digital source to the intended receiver (also called the sink). An analog communication system transfers information from an analog source to the sink.
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Digital and Analog Sources and Systems In the process of communication the transmitter usually alters (modulates) a property of a known waveform according to the message. For example the amplitude of a sine wave is modulated according to the audio content in a AM radio station. Strictly speaking, a digital waveform is defined as
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This note was uploaded on 12/29/2011 for the course ENG 3514 taught by Professor Arellano during the Fall '11 term at FIU.

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Lecture1 - INTRODUCTION E lectrical and Computer E...

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