 |
|
Wireless and Mobile Propagation
|
| |
|
Syllabus of the
course WIRELESS AND MOBILE PROPAGATION (A.A. 2018/2019)
(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
- A. Paraboni, M. D'Amico, Radiopropagazione, McGraw-Hill, 2002
(can be bought on-line from: www.ateneonline.it)
- H. L. Bertoni, Radio Propagation for Modern Wireless Systems,
Prentice Hall, 2000
USEFUL MATERIAL
Latest Exam Papers, Slides, Tables and Graphs can be found on BEEP.
SOFTWARE:
Radio Mobile: from this site you can dowload this excellent
(and free) software simulator
for the prediction of the performance of a radio system.
