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SYLLABUS

UNIT-I

Cellular Mobile Radio Systems Introduction to cellular mobile system, Performance criteria, Uniqueness of mobile radio environment, Operation of cellular systems, Hexagonal shaped cells, Analog and digital cellular systems. Elements of Cellular Radio System Design General description of the problem, Concept of frequency channels, Co-channel interference reduction factor, Desired C/I from a normal case in a omni-directional antenna system, Cell splitting, Consideration of the components of cellular system.

UNIT-II

Interference Introduction to co-channel interference, Real time co-channel interference, Co-channel measurement, Design of antenna system, Antenna parameters and their effects, Diversity receiver, Non-co-channel interference – Different types.

UNIT-III

Cell Coverage for Signal and Traffic Signal reflections in flat and hilly terrain, Effect of human made structures, Phase difference between direct and reflected paths, Constant standard deviation, Straight line path loss slope, General formula for mobile propagation over water and flat open area, Near and long distance propagation, Antenna height gain, Form of a point to point mode.

UNIT-IV

Cell Site and Mobile Antennas Sum and difference patterns and their synthesis, Omni-directional antennas, Directional antennas for interference reduction, Space diversity antennas, Umbrella pattern antennas, Minimum separation of cell site antennas, High gain antennas. Frequency Management and Channel Assignment Numbering and grouping, Setup access and paging channels, Channel assignments to cell sites and mobile units, Channel sharing and borrowing, Sectorization, Overlaid cells, Non-fixed channel assignment.

UNIT-V

Handoff, Dropped calls and cell splitting Handoff, Dropped calls and Cell splitting, Types of handoff, Handoff initiation, Delaying handoff, Forced handoff, Mobile assisted handoff, Intersystem handoff, Cell splitting, Micro cells, Vehicle locating methods, Dropped call rates and their evaluation. Digital Cellular Networks GSM architecture, GSM channels, Multiple access scheme, TDMA, CDMA.