MOBILE COMMUNICATION SYSTEM (Lecture, Tower, engineering, society, unit)

Requirement of Mobile communication system

• There is at least one mobile terminal in communication 

The beginnings

• High emittance
• Antenna as high as
• Maximum cell coverage 
• Handoff concept does not exist

Weakness of mobile communication system in early

• Expensive because it requires high power amplifier and antenna height
• Disturbed customer convenience when switching coverage
• Low Capacity
• Low spectral efficiency

Classification of Cellular Systems 
-- Based on Coverage
1. Large Zone (Single Cell/Convensional).
      * Radius +/- 20 miles.
      * STKB – Inti.
2. Multi Zone (Cellular).
      * STB ( NMT, GSM, CDMA.
3. Global System (Mobile Satelite).
      * Iridium, Globalstar,GMPCS

--  According to the Transmission System that is used
 1. STB dgn Transmisi Tereterial.
      * Radio Teresterial (VHF/UHF).
      * Single Cell Convensional & Cellular.
2. STB dgn Transmisi Satelite.
      * Iridium , Globalstar, GMPCS

cellular system standards
Analog Cellular Systems - First Generation

• AMPS ( Advanced Mobile Phone System )
• NMT 450 ( Nordic Mobile Phone )
• TACS ( Total Access Communication System )

 Digital Cellular Systems - the Second Generation 

• GSM ( Global System for Mobile Communication )
• DAMPS ( Digital AMPS )
• CDMA/IS-95

 Third Generation

•  IMT 2000

 

 



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