Title :
Micro-cellular modelling when base station antenna is below roof tops
Author_Institution :
France Telecom, CNET, Issy-les-Moulineaux, France
Abstract :
Future personal and mobile services will require high capacities to be handled by microcell networks. The paper describes the special characteristics of microcellular propagation when the base station antenna (BSA) is below the roof tops. BSA height influence and depolarisation are analysed. The diffraction influence on impulse response is examined. Using uniform theory of diffraction (UTD) the diffracted behaviour of corners is investigated. Especially the power carried by reflected and diffracted rays is analysed using simulations. Accurate approximations are found and a new analytical path loss model is proposed
Keywords :
cellular radio; electromagnetic wave polarisation; geometrical theory of diffraction; land mobile radio; radiowave propagation; transient response; analytical path loss model; base station antenna; corners; depolarisation; diffraction influence; height influence; impulse response; microcell networks; microcellular modelling; microcellular propagation; uniform theory of diffraction; Analytical models; Antenna measurements; Antenna theory; Antennas and propagation; Base stations; Microcell networks; Mobile antennas; Physical theory of diffraction; Reflector antennas; Telecommunications;
Conference_Titel :
Vehicular Technology Conference, 1994 IEEE 44th
Conference_Location :
Stockholm
Print_ISBN :
0-7803-1927-3
DOI :
10.1109/VETEC.1994.345138
