introduction to electronics communication

7/25/2019 Introduction to Electronics Communication

1/13

INTRODUCTION TO

ELECTRONICS

COMMUNICATION


2/13

1800 James Clerk Maxwell a Brtish Physicist, indicate that electricity and light both travel inform of

electromagnetic waves

1888 einrich ert! "erman scientist who able to radiate electromagnetic energy

from a machine called oscillator

18#$ %& Branley develo'ed the (rst detector

18#) *s Po'o+, -ssian ex'erimenter, recorded radio waves emanating fromlightning

18). /am-el Morse develo'ed telegra'h, the 1st electronic comm-nications system-sing

electromagnetic ind-ction

18. *lexander "raham Bell s-ccessf-lly transmitted h-man conversation over af-nctional

2homas 3atson tele'hone system

18#4 "-glielmo Marconi 5talian /cientist, acoom'lished the 1st wireless electroniccomm-nications

18# Marconi transmitting radio signal -' to $ miles from shi' to shore

18## Marconi sent the 1st wireless message across the english channel

1#0$ 2he (st transatlantic signal were sent from Pold-, %ngland, tonewfo-ndland

1#08 6ee 7eforest invented the triode vac--m t-be which allowed for the 1st 'ractical

am'li(cation of electronic signal

1#$0 eg-lar *M radio broadcast began

1#)) Ma %dward *rmstrong invented 9M


3/13

Let us test what you learn!Let us test what you learn!


4/13

Who invented the telephone?Who invented the telephone?

*& einrich ert!*& einrich ert!

B& /am-el MorseB& /am-el Morse

C& *lexander "raham BellC& *lexander "raham Bell 7& 6ee 7eforest7& 6ee 7eforest


5/13

Comm-nication:;5t is the 'rocess of re'resenting,

transferring, inter'reting or

'rocessing information among'ersons, 'laces or machines& 5tim'lies a sender, a receiver and a

transmission medi-m over which theinformation travels


6/13

%lectronicComm-nication /ystem:;5t is concerned with the sorting,

'rocessing and storing of informationbefore its transmission -singelectronic e


7/13

Let us test what you learn!Let us test what you learn!


8/13

In Ideal situation, Noise ExistIn Ideal situation, Noise Exist

*& 2r-e*& 2r-e

B& 9alseB& 9alse

C& PossibleC& Possible 7& 3ho cares=7& 3ho cares=


9/13

Baseband signal:;5t is the original signal information witho-t f-rther 'rocessing and mod-lating M>lti'lexing:; 5s the 'rocess of allowing two or more signals to share the same medi-m of channel Mod-lation

:; 5t is the 'rocess by which some characteristic of the carrier signal varies inaccordance with the baseband signal 9re


10/13

Mode of Electronic Communication Transmission

SIMPLEX

a& *m'lit-de Mod-lation adiob& 9re


11/13

7-'lex

:;alf 7-'lex

a& 2wo way radio

b& adio detection and rangingc& /o-nd navigation and anging

d& *mate-r adio

e& Citi!en band radio

:;9-ll 7-'lex

2ele'hones

:; 9-ll:9-ll 7-'lex

a& 6ocal *rea network

b& 7ata Comm-nication


12/13

Band A-mber 9re


13/13

FIRST LETTER

A >n:mod-lated Carrier

* 7o-ble /ideband 9-ll Carrier

B 5nde'endent /ideband 9-ll Carrier

C estigial /ideband 9-ll Carrier

/ingle /ideband 9-ll Carrier

J /ingle /ideband /-''ressed Carrier

/ingle /ideband ed-ced Carrier

9 9re

introduction to electronics communication

Documents