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Module I
The microwave link - Antennas, free space propagation, atmospheric effects, Terrain effects, fading, diversity, link analysis. Digital microwave radio systems - system protection, radio systems, comparison between analog and digital microwave radio.
ISDN - evolution, ISDN layers, services, Frame relay, B- ISDN, Asynchronous Transfer Mode (ATM)
Module II
Satellite communication - overview - emerging trends in communication satellites - Historical perspectives - orbits - Geosynchronous & sun synchronous orbits - Kepler laws - power system and eclipses - station keeping - altitude control and stabilisation, Frequency plan & reuse - Transponders - relative power levels - transmission path and path loss - power and link budget calculations - C/N ratio - Saturation flux density & noise consideration - EIRP. Multiple access methods - effect of noise and attenuation. Space borne mobile communication systems. LEO satellite constellation . Medium altitude constellation - beneficial characteristics . Indian scenario - details utilisation and services of INSAT & IRS.
Module III
Mobile cellular communications - Introduction - basic cellular system - performance criteria - uniqueness of mobile radio environment - operation of cellular system - elements of cellular radio system design - general description - frequency reuse - cochannel interference reduction factor - desired C/N from a normal case in an omni directional antenna system - hand off mechanism - cell splitting - consideration of the components of cellular system - Digital cellular systems - multiple access schemes - Global System for Mobile (GSM) - TDMA - CDMA - miscellaneous mobile systems.
Text books: -
Module I : Ref (1) (ch 4,5 & 8), Ref (2)
Module II : Ref (3) & (4)
Module III : Ref (5) (ch 1,2 & 15)
References: -
1. Robert G.Winch . Telecommunication Transmission Systems, Mc Graw Hill.
2. William Stallings, ISDN and Broadband ISDN with Frame Relay & ATM , 4th ed., Prentice Hall, Indian reprint.
3. Dennis Roody & John Coolen. Electronic Communication, 4th ed.
4. Tom Lodgdon. Mobile Communication Satellites (Theory & Applications), Mc Graw Hill.
5. William C.Y.Lee. Mobile Cellular Telecommunications, 2nd ed., Mc Graw Hill.
Question Paper: -
The question paper will consist of two parts. Part I is to cover the entire syllabus, and carries 40 marks. This will contain 10 compulsory questions of 4 marks each. Part II is to cover 3 modules, and carries 60 marks. There will be 3 questions from each module (10 marks each) out of which 2 are to be answered. |
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