WCS (B-TECH Electronics and Communication Engineering 6th)

Introduction: A basic cellular system, performance criteria, operation of cellular systems, planning

a cellular system, analog & digital cellular systems. Examples of Wireless Communication

Systems: Paging Systems, Cordless Telephone Systems, Cellular Telephone Systems. Blue tooth

and Zig Bee.

Elements of Cellular Radio Systems Design: General description of the problem, concept of

frequency reuse channels, co-channel interference reduction factor, desired C/I from a normal case

in an omni directional antenna system, cell splitting, consideration of the components of cellular

systems.

Digital Communication through fading multipath channels: Fading channel and their

characteristics- Channel modeling, Digital signaling over a frequency non selective slowly fading

channel. Concept of diversity branches and signal paths. Combining methods: Selective diversity

combining, Switched combining, maximal ratio combining, Equal gain combining.

Multiple Access Techniques for Wireless Communications: Introduction, Frequency Division

Multiple Access (FDMA), Time Division Multiple Access (TDMA), Spread Spectrum Multiple

Access, Space Division Multiple Access, Packet Radio Protocols; Pure ALOHA, Slotted ALLOHA.

Wireless Systems & Standards: AMPS and ETACS, United states digital cellular (IS- 54 & IS 136),

Global system for Mobile (GSM): Services, Features, System Architecture, and Channel Types,

Frame Structure for GSM, Speech Processing in GSM, GPRS/EDGE specifications and features. 3G

systems: UMTS & CDMA 2000 standards and specifications. CDMA Digital standard (IS 95):

Frequency and Channel specifications, Forward CDMA Channel, Reverse CDMA Channel, Wireless

Cable Television.

Future trends: 4G mobile techniques, LTE-Advance systems