volume | PIER Journals

Abstract

We present a new approach to the modeling of angle and time of arrival statistics for radio propagation in typical office buildings, in which the majority of interior scattering objects are either parallel or perpendicular to the exterior walls. We first describe the reradiating elements in office buildings as randomly distributed arrays of thin strips. The amount of clutter and the amount of transmission/reflection loss are then accounted for through several key parameters of the site-specific features of indoor environment, such as the layout and materials of the building under consideration. Subsequently, the important channel parameters including power azimuthal spectrum (PAS) and power delay spectrum (PDS) are derived. An appealing observation is that when the path angles from multiple channel trials are measured and collectively analyzed, deterministic angle clustering becomes evident. This phenomenon agrees well with the existing ray-tracing (RT) results reported by Jo et al. in buildings of this type and cannot be explained by other geometric channel models (GCMs). Furthermore, the proposed model predicts an asymmetric cluster PAS for a single-channel-trial scenario, which yields an excellent fit to the experimental data presented by Poon and Ho. Finally, we have also investigated the behaviors of the superimposed PAS and PDS under various channel conditions.

1. Molisch, A., D. Cassioli, C.-C. Chong, S. Emami, A. Fort, B. Kannan, J. Karedal, J. Kunisch, H. G. Schantz, K. Siwiak, and M. Z. Win, "A comprehensive standardized model for ultrawideband propagation channel," IEEE Trans. Antennas Propagat., Vol. 54, 3151-3166, Nov. 2006.
doi:10.1109/TAP.2006.883983

2. Molisch, A., H. Asplund, R. Heddergott, M. Steinbauer, and T. Zwick, "The COST259 directional channel model --- Part I: Overview and methodology," IEEE Trans. Wirel. Commun., Vol. 5, 3421-3433, Dec. 2006.
doi:10.1109/TWC.2006.256966

3. Franceschetti, M., "Stochastic rays pulse propagation," IEEE Trans. Antennas Propagat., Vol. 52, 2742-2752, Oct. 2004.
doi:10.1109/TAP.2004.834376

4. Martini, A., M. Franceschetti, and A. Massa, "Stochastic ray propagation in stratified random lattices," IEEE Antennas Wirel. Propagat. Lett., Vol. 6, 232-235, 2007.
doi:10.1109/LAWP.2007.895923

5. Hu, L. Q., H. Yu, and Y. Chen, "Path loss models based on stochastic rays," IET Micro. Antennas Propag., Vol. 1, No. 3, 602-608, 2007.
doi:10.1049/iet-map:20060346

6. Hansen, J. and M. Reitzner, "Efficient indoor radio channel modeling based on integral geometry," IEEE Trans. Antennas Propagat., Vol. 52, 2456-2463, Sep. 2004.
doi:10.1109/TAP.2004.834087

7. Ullmo, D. and H. U. Baranger, "Wireless propagation in buildings: A statistical scattering approach," IEEE Trans. Veh. Technol., Vol. 47, No. 9, 947-955, 1999.
doi:10.1109/25.765025

8. Janaswamy, R., "An indoor pathloss model at 60 GHz based on transport theory," IEEE Antennas Wirel. Propagat. Lett., Vol. 5, 58-60, 2006.
doi:10.1109/LAWP.2006.870361

9. Janaswamy, R., "Angle and time of arrival statistics for the Gaussian scatter density model," IEEE Trans. Wirel. Commun., Vol. 1, 488-497, Jul. 2002.

10. Petrus, P., J. H. Reed, and T. S. Rappaport, "Geometrical-based statistical macrocell channel model for mobile environments," IEEE Trans. Commun., Vol. 50, 495-502, Mar. 2002.
doi:10.1109/26.990911

11. Chen, Y. and V. K. Dubey, "Accuracy of geometric channel-modeling methods," IEEE Trans. Veh. Technol., Vol. 53, 82-93, Jan. 2004.
doi:10.1109/TVT.2003.821999

12. Molisch, A. F., "A generic model for MIMO wireless propagation channels in macro- and microcells," IEEE Trans. Signal Processing, Vol. 52, 61-71, Jan. 2004.
doi:10.1109/TSP.2003.820144

13. Hamalainen, J., S. Savolainen, R. Wichman, K. Ruotsalainen, and J. Ylitalo, "On the solution of scatter density in geometry based channel models," IEEE Trans. Wirel. Commun., Vol. 6, No. 3, 1054-1062, Mar. 2007.
doi:10.1109/TWC.2007.05408

14. Iskander, M. F. and Z. Yun, "Propagation prediction models for wireless communication systems," IEEE Trans. Microw. Theory Tech., Vol. 50, 662-673, Mar. 2002.
doi:10.1109/22.989951

15. Seidel, S. Y. and T. S. Rappaport, "Site-specific propagation prediction for wireless in-building personal communication system design," IEEE Trans. Veh. Technol., Vol. 43, 879-891, Nov. 1994.

16. Hassan-Ali, M. and K. Pahlavan, "A new statistical model for site-specific indoor radio propagation prediction based on geometric optics and geometric probability," IEEE Trans. Wireless Commun., Vol. 1, 112-124, Jan. 2002.
doi:10.1109/7693.975450

17. Fortune, S., D. Gay, B. Kernighan, O. Landron, R. Valenzuela, and M. Wright, "WISE design of indoor wireless systems: Practical computation and optimization," IEEE Comput. Sci. Eng., Vol. 2, 58-69, Spring, 1995.
doi:10.1109/99.372944

18. Jo, J. H., M. A. Ingram, and N. Jayant, "Deterministic angle clustering in rectangular buildings based on ray-tracing," IEEE Trans. Commun., Vol. 53, 1047-1052, Jun. 2005.
doi:10.1109/TCOMM.2005.849979

19. Poon, A. and M. Ho, "Indoor multiple-antenna channel characterization from 2 to 8 GHz," Proc. IEEE ICC, Anchorage, AK, 3519-3523, May 2003.

20. Zhang, Y., A. K. Brown, W. Q. Malik, and D. J. Edwards, "High resolution 3-D angle of arrival determination for indoor UWB multipath propagation," IEEE Trans. Wirel. Commun., Vol. 7, 3047-3055, Aug. 2008.
doi:10.1109/TWC.2008.060979

21. Malik, W. Q., C. J. Stevens, and D. J. Edwards, "Spatiotemporal ultrawideband indoor propagation modelling by reduced complexity geometric optics," IET Commun., Vol. 1, No. 4, 751-759, 2007.
doi:10.1049/iet-com:20060551

22. Spencer, Q. H., B. Jeffs, M. A. Jensen, and A. L. Swindlehurst, "Modeling the statistical time and angle of arrival characteristics of an indoor multipath channel," IEEE J. Select. Areas Commun., Vol. 18, No. 3, 347 360.

23. Bertoni, H., W. Honcharenko, L. R. Maciel, and H. Xia, "UHF propagation prediction for wireless personal communications," Proc. IEEE, Vol. 82, 1333-1359, Sep. 1994.
doi:10.1109/5.317081

24. Ghavami, M., L. B. Michael, and R. Kohno, Ultra Wideband Signals and Systems in Communication Engineering, John Wiley and Sons, 2004.

25. Healey, G. H. and T. O. Binford, "Local shape from specularity," Computer Vision, Graphics, and Image Processing, Vol. 42, No. 1, 62-86, 1988.
doi:10.1016/0734-189X(88)90143-0

26. Ragheb, H. and E. R. Hancock, "A probabilistic framework for specular shape-from-shading," Pattern Recognition, Vol. 36, 407-427, 2003.

27. Cramer, R. J.-M., R. A. Scholtz, and M. Z. Win, "Evaluation of an ultra-wide-band propagation channel," IEEE Trans. Antenna Propagat., Vol. 50, No. 5, 561-570, 2002.
doi:10.1109/TAP.2002.1011221

28. Pedersen, K., P. Mogensen, and B. Fleury, "A stochastic model of the temporal and azimuthal dispersion seen at the base station in outdoor propagation environments," IEEE Trans. Veh. Technol., Vol. 49, 437-447, Mar. 2000.
doi:10.1109/25.832975

29. Cassioli, D., M. Z. Win, and A. F. Molisch, "The ultra-wide bandwidth indoor channel: From statistical model to simulations," IEEE J. Select. Areas Commun., Vol. 20, 1247-1257, Aug. 2002.
doi:10.1109/JSAC.2002.801228

30. McDonnell, J. T. E., T. P. Spiller, and T. A. Wilkinson, "RMS delay spread in indoor LOS environments at 5.2 GHz," IEE Electronics Letters, Vol. 34, 1149-1150, May 1998.
doi:10.1049/el:19980828

31. Saunders, S. R. and A. Aragon-Zavala, Antennas and Propagation for Wireless Communication Systems, 2nd Ed., John Wiley and Sons, 2007.

32. Rappaport, T., Wireless Communications: Principles and Practice, 2nd Ed., Prentice Hall PTR, 2001.

33. Sedaghat Alvar, N., A. Ghorbani, and H. R. Amindavar, "A novel hybrid approach to ray tracing acceleration based on pre-processing & bounding volumes," Progress In Electromagnetics Research, Vol. 82, 19-32, 2008.
doi:10.2528/PIER08013007

34. Cocheril, Y. and R. Vauzelle, "A new ray-tracing based wave propagation model including rough surfaces scattering," Progress In Electromagnetics Research, Vol. 75, 357-381, 2007.
doi:10.2528/PIER07061202

Dr. Yifan Chen

Dr. Zhenrong Zhang

Dr. Luoquan Hu

Prof. Predrag B. Rapajic