P.N. Zakharov - Ph. D. (Phys.-Math.), Associate Professor, Faculty of Physics, M.V. Lomonosov Moscow State University. E-mail: zakharov1@mail.ru A.F. Korolev - Ph. D. (Phys.-Math.), Associate Professor, Faculty of Physics, M.V. Lomonosov Moscow State University. E-mail: korolev_phys@mail.ru E.V. Mitrofanov - Post-graduate Student, Graduate Research Scientist, Kotel\'nikov Institute of Radioengineering and Electronics of RAS. E-mail: mitrofanov_ireran@mail.ru V.A. Cherepenin - Dr. Sc. (Phys.-Math.), Professor, Corresponding Memeber of RAS, Deputy Director of Kotel\'nikov Institute of Radioengineering and Electronics of RAS. E-mail: cher@cplire.ru

The dependence of power delay profiles upon bandwidth (temporal resolution) and central frequency is studied using ultrawideband measurements. The necessary measurement parameters were defined for creating wideband channel models, verification and con-struction of accurate site-specific radiowave propagation models, investigation of propagation mechanisms. The accuracy of ray tracing and numerical Maxwell-s equation solver models were estimated and compared on the basis of measured delay profiles. For the considered complex indoor environment the majority of significant paths has been resolved with 1 GHz and especially 2−2.4 GHz bandwidth. 2 GHz bandwidth provided 700 ps temporal resolution, allowing to distinguish paths with 21 cm difference. Thus, the major portion of environmental irregularities had the size of 20 cm and more.

 

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