Data Communication : (Unit3: COMMUNICATION MEDIA)

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 Unit 3:

COMMUNICATION MEDIA: guided media and unguided media, Radio frequency allocation, Propagation of Radio waves, Terrestrial microwave, Satellite communication, Cellular Telephony

Unit3 Transmission Media 

3.1 Introduction

3.2Guided Media 

3.2.1 Twisted Pair Cable (TPC)


Tringulation

    Application

3.5.4 LEO(Low-Earth -Orbit)Satellite



unshielded vs shielded twisted pair cable
  • connectors 
  • application


3.2.2 CO-axial Cable

  • connectors 
    • bnc connector 
    • bnc T connector
    • bnc Terminator
  • application 
3.2.3 Fiber Optic Cable
        propagation modes
  • Multi-Mode
    • Single Mode
  • connectors
  • application 
  • advantage


Disadvantages
3.3 unguided media wireless
3.3.2 Radio Waves
  • Omni directional antenna 
  • application
3.3.2 MicroWave


3.3.3 Infrared
  • Application
3.4 Cellular Telephony



3.4.1 Operation
  • Transmitting 
  • Receiving
 Handoff

3.4.2 First Generation (1G)
Transmission

3.4.3 Second Generation (2G)
D-AmPS(Digital -AMPS)
Transmission
GSM( Global system for mobile communication)

IS-95(Interim Standard 95)
Acceo Scheme
  • modulation 
  • radio system 
  • antenna 
  • application
Reerse Transmission
3.4.4 Third Generation
IMT-2000 Radio Interfaces
IMT-Ds
IMT-MC
IMT-TC
IMT-SC
IMT-FT
3.4.5 Fourth Generation
3.5 Satellite Networks

3.5.1 Modes of Operation
  • equatorial Orbit 
  • Indiened Orbit 
  • polar Orbit
  • Frequency

  • 3.5.2 GEO( Geostationary Earth orbit satellites)
3.5.3 Medium Earth Orbit(MEO) satellites




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