advanced communication system diploma notes
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advanced communication system diploma notes

1. MICROWAVE DEVICES
Microwave signals - challenges and applications. Waveguides-introduction, types,
application, energy coupling, operating range, mode of operation, TE and TM modes.
Cavity resonators-operation, types and applications. Microwave semiconductor devices,
Microwave tubes-construction, working of two cavity klystron, Reflex klystron,
Magnetron, TWT and mention their practical consideration and applications.
2. RADAR PRINCIPLES
Radar principle, Radar frequencies and powers, Definition of pulse, PW, PRF, PRI,
average power, peak power and duty cycle. Radar range equation, factors influencing
radar range, simple problems. Block diagram of pulse radar system, modulator, duplexer,
displays, antenna scanning and tracking, special purpose radars-MTI system, radar
beacons, CW Doppler radar, FMCW Radar, Aircraft landing system- GCA, ILS.
3. SATELLITE FUNDAMENTALS
Definition of satellite, orbit fundamentals, orbit shape, satellite speed and period, angles,
satellite repeater, geosynchronous satellites, LEO, MEO, GEO satellites, station keeping,
attitude control and satellite position.
4. SATELLITE COMMUNICATION SYSTEM
Satellite communication system-transponder, frequency allocation, satellite bandwidth,
increasing channel capacity, frequency reuse and spatial isolation. Satellite subsystem -
block diagram explanation, architecture and organization transponders-types and
explanation of each, multi channel system, application payload. Earth station- block
diagram and explanation of each section.
5. SATELLITE APPLICATIONS
Introduction to satellite applications-different areas, satellite television- direct broadcast
satellite, cable TV, direct home reception, telephone services via satellite, data
communication services, satellite for earth observation, satellites for military
applications, GPS, VSAT.
6. DIGITAL TELEPHONY
Digital exchange-introduction, block diagram of digital exchange, mass memory, call
processing in an electronic exchange, types of signaling, national subscriber dialing, basic
telecommunication network and network hierarchy.
7. MOBILE COMMUNICATIONS
Evolution of mobile radio communication-1G,2G,3G,4G cellular networks , cellular
concept- frequency re-use, Capacity expansion techniques, channel allocation, working of
a typical cellular system, cellular component identification. Call establishment-mobile
terminated and mobile originated call, mobility management-location management,
location updating, paging messages, and handoff strategies.
GSM-GSM services and features, GSM system architecture, IS 95 CDMA,CDMA 2000
system-services and features, architecture.
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