r radio system", IEEE Trans. Vehicular Technol., 1, 1992. Ishimaru, "Introduction to wave propagation and scattering in random media", IEEE, AP, 1985. ITU-R, P. 529-2, "Okumara-Hata propagation model", in Prediction Methods for the Terrestrial Land Mobile Services in the VHF and UHF Bands, ITU, Geneva, 1995, pp. 5-7. ITU-R, P.530-9, Propagation Data and Prediction Methods Required for the Design of Terrestrial Line-of-Sight Systems. ITU-R, P.837-3, Characteristics of Propagation for Propagation Modelling. ITU-T, G.826, Error Performance and Objectives for International, Constant Bit Rate Digital Paths at or above Primary Rate. ITU-T, G.827, Availability Parameters and Objectives for Path Elements of International Constant Bit Rate Digital Paths at or above the Primary Rate. ITU-T, P.800, Telecommunications Standardization Sector of ITU 08/1996, Series P: Telephone Transmission Quality, Methods for Objective and Subjective Assessment of Quality/Methods for Subjective Determination of Transmission Quality. ITU-T, P.862, Telecommunication Standardisation Sector of ITU 02/2001, Series P: Telephone Transmission Quality, Telephone Installations, Local Line Networks, Methods for Objective and Subjective Assessment of Quality/Perceptual Evaluation of Speech Quality (PESQ), An Objective Method for End-to-End Speech Quality Assessment of Narrow-Band Telephone Networks and Speech Codecs. Jakes, Jr W.C., (ed.), Microwave Mobile Communications, Wiley-Interscience, 1974. Janaswamy, R., Radio Propagation and Smart Antennas for Wireless Communications, Kluwner Academic Publishers, 2000. Kaaresoja, T. and Ruutu, J., "Synchronization and cell loss in cellular ATM evaluation system", in Proceedings of the 5th International Workshop on Mobile Communication, moMuc'98, Berlin, 12-14 October 1998. Kazimierz Siwiak, Radio Propagation for Antennas for Personal Communications, Artech House, 1998. Knorr, J.B., "Guided EM waves with atmospheric ducts", Microwave and RF, May 1985. Ko, H., "A practical guide to anomalous propagation", Microwa