1. Lawton, M. C. and J. P. McGeehan, "The application of a deterministic ray launching algorithm for the prediction of radio channel characteristics in small-cell environments," IEEE Trans. Veh. Tech., Vol. 43, No. 4, 955-969, 1994.
doi:10.1109/25.330158 Google Scholar
2. Yang, C. F., B. C. Wu, and C. J. Ko, "A ray-tracing method for modeling indoor wave propagation and penetration," IEEE Trans. Antennas Propagat., Vol. 46, No. 6, 907-919, 1998.
doi:10.1109/8.686780 Google Scholar
3. Catedra, M. F., Cell Planning for Wireless Communications, Artech House, 1999.
4. Chen, C. H., C. L. Liu, C. C. Chiu, and T. M. Hu, "Ultra-wide bandc hannel calculation by SBR/Image techniques for indoor communication," Journal of Electromagnetic Waves and Applications, Vol. 20, No. 1, 41-51, 2006.
doi:10.1163/156939306775777387 Google Scholar
5. El-Sallabi, H. M. and P. Vainikainen, "Radio wave propagation in perpendicular streets of urban street grid for microcellular communications. Part I: Channel modeling," Progress In Electromagnetics Research, Vol. 40, 229-254, 2003.
doi:10.2528/PIER02112502 Google Scholar
6. Wang, N., Y. Zhang, and C. H. Liang, "Creeping ray-tracing algorithm of UTD method based on NURBS models with the source on surface," Journal of Electromagnetic Waves and Applications, Vol. 20, No. 14, 1981-1990, 2006.
doi:10.1163/156939306779322602 Google Scholar
7. Mphale, K. and M. Heron, "Ray tracing radio waves in wildfire environments," Progress In Electromagnetics Research, Vol. 67, 153-172, 2007.
doi:10.2528/PIER06082302 Google Scholar
8. Li, L. W., T. S. Yeo, P. S. Kooi, M. S. Leong, and J. H. Koh, "Analysis of electromagnetic wave propagation in forest environment along multiple paths ," Progress In Electromagnetics Research, Vol. 23, 137-164, 1999.
doi:10.2528/PIER98102201 Google Scholar
9. Liu, Y.-J., Y.-R. Zhang, and W. Cao, "A novel approach to the refraction propagation characteristics of UWB signal waveforms," Journal of Electromagnetic Waves and Applications, Vol. 21, No. 14, 1939-1950, 2007.
doi:10.1163/156939307783152966 Google Scholar
10. Fugen, T., J. Maurer, W. Sorgel, and W. Wiesbeck, "Characterization of multipath clusters with ray-tracing in urban MIMO propagation environments at 2 GHz," IEEE Proceedings of the International Symposium on Antennas and Propagation, Washington DC, USA, July 2005.
11. Agelet, F. A., A. Formella, J. M. H. Rabanos, F. I. Vicente, and F. P. Fontan, "Efficient ray-tracing acceleration techniques for radio propagation modeling," IEEE Trans. Veh. Tech., Vol. 49, No. 6, 2000.
doi:10.1109/25.901880 Google Scholar
12. Yun, Z., M. F. Iskander, and Z. Zhang, "Fast ray tracing procedure using space division with uniform rectangular grid," IEEE Electronics Letters, Vol. 36, No. 10, 895-897, May 2000.
doi:10.1049/el:20000653 Google Scholar
13. Tao, Y. B., H. Lin, and H. J. Bao, "KD-tree based fast ray tracing for RCS prediction," Progress In Electromagnetics Research, Vol. 81, 329-341, 2008.
doi:10.2528/PIER08011305 Google Scholar
14. Bang, J.-K. and B.-C. Kim, "Time consumption reduction of ray tracing for RCS prediction using efficient grid division and space division algorithms," Journal of Electromagnetic Waves and Applications, Vol. 21, No. 6, 829-840, 2007.
doi:10.1163/156939307780749129 Google Scholar
15. Jin, K.-S., "Fast ray tracing using a space-division algorithm for RCS prediction," Journal of Electromagnetic Waves and Applications, Vol. 20, No. 1, 119-126, 2006.
doi:10.1163/156939306775777341 Google Scholar
16. 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 Google Scholar
17. Teh, C. H., F. Kung, and H. T. Chuah, "A path-correctedw all model for ray-tracing propagation modeling," Journal of Electromagnetic Waves and Applications, Vol. 20, No. 2, 207-214, 2006.
doi:10.1163/156939306775777288 Google Scholar
18. Liang, C., Z. Liu, and H. Di, "Study on the blockage of electromagnetic rays analytically," Progress In Electromagnetics Research B, Vol. 1, 253-268, 2008.
doi:10.2528/PIERB07102902 Google Scholar
19. Wald, I., H. Friedrich, G. Marmitt, P. Slusallek, and H. Seidel, "Faster isosurface ray tracing using implicit KD-trees," IEEE Trans. Vis. Comput. Graph., Vol. 11, No. 5, 562-572, 2005.
doi:10.1109/TVCG.2005.79 Google Scholar
20. Weghorst, H., G. Hooper, and D. P. Greenberg, "Improved computational methods for ray tracing," IEEE Trans. Vis. Comput. Graph., Vol. 11, No. 5, 562-572, 2005.
doi:10.1109/TVCG.2005.79 Google Scholar
21. Skyum, S., "A simple algorithm for computing the smallest enclosing circle," Inform. Process. Lett., Vol. 37, 121-125, 1991.
doi:10.1016/0020-0190(91)90030-L Google Scholar