The application of a deterministic ray launching algorithm for the prediction of radio channel characteristics in small-cell environments

Propagation characteristics play a fundamental role in the design and implementation of radio systems. The application of broadband digital data services within the cordless environment requires close consideration of the dispersive nature of radio channels. A prediction algorithm is presented such that propagation characteristics can be estimated for small-cell high-data-rate systems. Through the use of geometric optics and geometric theory of diffraction the algorithm performs ray launching techniques in order to evaluate reflected, transmitted, and diffracted rays from a simplified description of a given environment. Both modeled and measured results are presented demonstrating the model's ability to predict typical rms delay spread values. >

[1]  J. P. McGeehan,et al.  Modelling and simulation of frequency selective fading using switched antenna diversity , 1990 .

[2]  Kj Gladstone,et al.  Computer simulation of multipath fading in the land mobile radio environment , 1980 .

[3]  R. Luebbers.  Finite conductivity uniform GTD versus knife edge diffraction in prediction of propagation path loss , 1984 .

[4]  Kaveh Pahlavan,et al.  Statistical modeling and com-puter simulation of indoor radio channel , 1991, INFOCOM 1991.

[5]  J. P. McGeehan,et al.  An analytical model for indoor multipath propagation in the picocellular environment , 1991 .

[6]  D. Devasirvatham.  Time delay spread and signal level measurements of 850 MHz radio waves in building environments , 1986 .

[7]  R. Kouyoumjian,et al.  A uniform geometrical theory of diffraction for an edge in a perfectly conducting surface , 1974 .

[8]  J. D. Parsons,et al.  Sounding techniques for wideband mobile radio channels : a review , 1991 .

[9]  J. P. McGeehan,et al.  The application of GTD and ray launching techniques to channel modelling for cordless radio systems , 1992, [1992 Proceedings] Vehicular Technology Society 42nd VTS Conference - Frontiers of Technology.

[10]  George L. Turin,et al.  A statistical model of urban multipath propagation , 1972 .

[11]  Joe McGeehan,et al.  A Computer Simulation of the Effect of Fading on a Quasi-Synchronous Sideband Diversity AM Mobile Radio Scheme , 1984, IEEE Journal on Selected Areas in Communications.

[12]  J. Zander.  A stochastical model of the urban UHF radio channel , 1981, IEEE Transactions on Vehicular Technology.

[13]  D.L. Schilling,et al.  Urban/suburban out-of-sight propagation modeling , 1992, IEEE Communications Magazine.

[14]  Hirofumi Suzwi,et al.  A Statistical Model for Urban Radio Propagation , 1977 .

[15]  H. Suzuki,et al.  A Statistical Model for Urban Radio Propogation , 1977, IEEE Trans. Commun..

[16]  Ieee Antennas,et al.  Geometric theory of diffraction , 1981 .

[17]  J. Keller,et al.  Geometrical theory of diffraction. , 1962, Journal of the Optical Society of America.

[18]  Theodore S. Rappaport,et al.  Statistical channel impulse response models for factory and open plan building radio communicate system design , 1991, IEEE Trans. Commun..

[19]  D. Cox.  Delay Doppler characteristics of multipath propagation at 910 MHz in a suburban mobile radio environment , 1972 .

[20]  Theodore S. Rappaport,et al.  A ray tracing method for predicting path loss and delay spread in microcellular environments , 1992, [1992 Proceedings] Vehicular Technology Society 42nd VTS Conference - Frontiers of Technology.

[21]  H. Hashemi.  Simulation of the urban radio propagation channel , 1979, IEEE Transactions on Vehicular Technology.

[22]  M. Vaarama,et al.  The need, requirement and contents of the European database on the elderly policy/services. Proceedings from the COST A5 workshop, Helsinki, 2-4 March, 1994. European cooperation in the field of scientific and technical research , 1994 .

[23]  R. Davies,et al.  Propagation measurements at 1.7 GHz for microcellular urban communications , 1990 .

[24]  E. B. Ferrell,et al.  Ultra-Short-Wave Propagation , 1933, Proceedings of the Institute of Radio Engineers.