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)