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EEC 128 Telecommunication Engineerin (I) Pdf Download

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EEC 128 Telecommunication Engineerin (I) Pdf Download

 

TABLE OF CONTENTS

Week1: Introduction to communication systems

Week2: Elements of a communication systems

Week3: Types of transducers

Week4: Types of microphones

Week5: Loudspeakers

Week6: Amplitude modulation

Week7: Frequency Modulation

Week8: Amplitude modulator

Week9: Frequency Modulators

Week10: Amplitude Demodulators

Week11: Frequency demodulator

Week12: Tuned radio receiver

Week13: Superherodyne Receiver

Week14: AM Superherodyne Receiver

Week15: FM Receiver

 

EEC 128 CHAPTER 1

Principles of Communication Week 1

1.1 Introduction to communication systems

Communication is the transmission of information /message from one point to

another. Communication enters our lives in many ways:

– Telephone – makes us talk to any person anywhere.

– Radio and television – entertain and educate.

– Communication signals as navigational aids – ships, aircrafts and satellites.

– Weather forecasting – conditions measured by a multitude of sensors are communicated to forecasters.

– Videophones, voicemail and satellite conferencing – enable seeing live images

instantly and communicate directly with people located far away.

– Digital data transmission and retrieval – has made realization of e-mail, FAX and internet possible.

We communicate through speech. In modern communication systems, the

information is first converted into electrical signals and then sent electronically.

 

Also Check : EEC 123 Electrical Machiens I Lecture Note Pdf Download

 

Communication system

Two persons talking to each other constitute the simplest communication system. The

person who speaks is the source, the person listening is the receiver and the intervening

air is the communication link between them. A communication system consists of three

basic components:

– Transmitter (source)

– Communication channel (link – medium)

– Receiver

Nature/details of these components depend on:

1. Nature of the signal/ message to be communicated.

2. Distance which separates the source and the receiver.

Direct talking is possible over short distances – sound waves attenuate fast. Long

distance communication requires the signal/message to be converted into an electrical

signal/a set of signals /electromagnetic waves.

– Long distance communication requires a link between the source and the

 

EEC 128 PDF chapter two

 

 

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