EEC 319 Radio Communications Resit 2023

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EEC 319: First Semester Resit for EEC319, Radio Communication, University of Buea, instructors DEUSSOM Eric and MBIEDA Steve, 22/02/2023, 2 hours. Part A: Exercise 1 (20 marks) covers defining radio communication, Maxwell's equations, deriving the EM wave equation, defining phase velocity/Poynting vector/wave impedance/polarization, and describing TDMA/FDMA/CDMA/OFDMA with applications. Exercise 2 (15 marks) covers oblique-incidence reflection/refraction at a dielectric boundary (angle of reflection/refraction via Snell's law, transmitted/reflected E and H field amplitudes via Fresnel coefficients for parallel polarization), antenna parameters and their functions, and diffraction vs scattering. Part B: Exercise 3 (12 marks) is a radio-broadcasting link-budget and coverage-radius calculation (dBm conversion, EIRP, maximum acceptable path loss, coverage radius with and without a supplementary loss, and a Google Earth site-measurement procedure). Exercise 4 (24 marks) is an outdoor WiFi/WLAN coverage design for UB campus (maximum allowable path loss, reducing the propagation model to PL=A+B*log(d), AP range in km/m, AP coverage area, and the number of APs needed for 0.39 km^2).