chapter 2 wireless and personal communication systems
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Lectures on Wireless Networks
By
Dr. Arshad A. Khan
Dated: 14-03-2006
Level MS EEElectrical Engineering Department, University of Engineering and Technology, Lahore
Lecture # 2An Overview of Cellular Systems
Concepts of Cellular Networks There are four essential elements for cellular
networks Low Power Transmitter and small coverage areas
or cells Frequency reuse Handoff and central control Cell splitting to increase call capacity
1st Generation Cellular Networks Total Access Communication System (TACS) Nordic Mobile Telephone System (NMTS) Japanese Nippon Telephone and Telegraph
(NTT)
2nd Generation Cellular Networks Narrowbadn Advanced Mobile Phone Service
(N-AMPS) Time-Division Multiple Access (TDMA) Extended Time-Division Multiple Access (E-
TDMA) Spread Spectrum (SS) – Code-Division
Multiple Access (CDMA)
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