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Wireless and Mobile Propagation
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Syllabus of the
course WIRELESS AND MOBILE PROPAGATION (A.A. 2024/2025)
(Prof. Michele D'AMICO )
Objectives. This course addresses the fundamentals of radiowave propagation, with particular emphasis on wireless and mobile systems. An engineering approach is adopted: excessive formalism is avoided while theoretical instruments are given, so that the student can address real problems starting from a solid background.
Introduction. Electromagnetic waves (frequency, wavelength, polarization). Nature of the waves: direct wave, reflected wave, diffracted wave, scattered wave. Multipath radio channel; mean delay and delay spread.
Antennas. Antennas as transducers. Antenna parameters: directivity, gain, directivity function, effective area, effective length, impedance. Equivalent circuit. Link budget in free space (Friis equation). EIRP.
Nomadic systems. Time dispersion; wideband and narrowband channel; LOS (Rice distribution) and NLOS (Rayleigh distribution); space correlation. Fading countermeasures (multiple antennas, frequency hopping, etc.). Applications: civic WiFi networks, digital broadcasting, etc.
Mobile systems. Frequency dispersion; Doppler effect and Doppler shift; correlation in time and frequency; fading countermeasures. Applications: mobile cellular networks, inter-vehicular networks, etc.
Indoor propagation. Reverberating environment; penetration through walls, floor and ceiling made of common indoor materials (marble, glass, concrete, wood, etc.); dependence on frequency; fading countermeasures. Applications: WiFi, domotics, UWB systems, sensor networks, etc.
Models and methods. Optical geometry; empirical propagation models; deterministic models (ray tracing and launching, etc.); radio coverage prediction; numerical tools (examples).
Bibliography
- J. D. Parsons, The
Mobile Radio Propagation Channel, 2nd Edition, Wiley, 2000
- C.A. Levis, J.T. Johnson, F.L. Teixeira, Radiowave Propagation, Wiley, 2010.
USEFUL MATERIAL
For
more information about the course (Pre-requisites, assessment
procedure, etc.), please refer to the relative information page
published on the University website.
Exam Papers, Slides, Tables and Graphs can be found on WEBEEP.
Radio Mobile: from this site you can dowload this excellent
(and free) software simulator
for the prediction of the performance of a radio system.