Professor Dr Arshad Abbas Khan MS UEC Tokyo Japan 1994 PhD UEC Tokyo Japan 2003 Post-Doc Georgia Tech USA

2. Lectures on Wireless
Networks
By
Dr. Arshad A. Khan
Dated: 14-03-2006

3. Level MS EE
Electrical Engineering Department, University of
Engineering and Technology, Lahore

4. Lecture # 2
An Overview of Cellular Systems

5. 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

6. 1st Generation Cellular Networks
 Total Access Communication System (TACS)
 Nordic Mobile Telephone System (NMTS)
 Japanese Nippon Telephone and Telegraph
(NTT)

9. 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)