Geometrical Optics Based Path Loss Model for Furnished Indoor Environment
关键词:
Geometrical Optics, indoor propagation, optimization, path loss摘要
This paper describes the Geometrical Optics (GO) based path loss model for indoor environment path loss prediction. Both Geometrical Optics based total rays model and direct ray path loss model were developed. Optimization was then conducted to improve both models in path loss prediction for case of Line-Of- Sight (LOS) indoor environment. Both Geometrical Optics based total rays model and direct ray model were optimized with log-distance-dependent expression using least-square approach. This log-distance-dependent expression includes all effects due to multiple reflection and all uncertainties which is distance-dependent. The path loss measurement was conducted in Division of Information Technology (DITSC), Universiti Putra Malaysia. Both models were optimized with measured path loss which was collected from DITSC. The value of correction factor and coefficient in additional expression for optimized GO were developed and presented in this paper. The optimized GO based modes ware validated at five buildings in Universiti Putra Malaysia by referring to the absolute mean error for its accuracy and effectiveness in path loss prediction. The optimized direct ray model shows the best accuracy compared with optimized total rays model, direct ray model and total rays model.
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参考
S. R. Saunders, Antennas and Propagation for Wireless Communication Systems. New York: John Wiley & Sons Publisher, 1999.
J. B. Anderson, T. S. Rappaport, and S. Yoshida, “Propagation measurements and models for wireless communications channels,” IEEE Communications Magazine, pp. 42-49, 1995.
E. M. Cheng, Z. Abbas, M. Fareq, K. Y. Lee, K. Y. You, and S. F. Khor, “Comparative study between measurement and predictions using geometrical optics and uniform theory of diffraction for case of non-line-of-sight (NLOS) in indoor environment,” Wireless Pers. Commun., vol. 71, pp. 2197-2213, 2012.
T. S. Rappaport, Wireless Communications: Principle and Practice. Englewood Cliffs, NJ: Prentice-Hall, 1996.
V. Erceg, L. J. Greenstein, S. Y. Tjandra, S. R. Parkoff, A. Gupta, B. Kulic, A. A. Julius, and R. Bianchi, “An empirically based path loss model for wireless channels in suburban environments,” IEEE Journal on Selected Areas in Communications, vol. 17, no. 7, pp. 1205-1211, 1999.
V. S. Abhayawardhana, I. J. Wassell, D. Crosby, M. P. Sellars, and M. G. Brown, “Comparison of empirical propagation path loss models for fixed wireless access systems,” IEEE 61st Vehicular Technology Conference, 2005, VTC 2005-Spring, vol. 1, pp. 73-77, 2005.
A. Bose and C. H. Foh, “A practical path loss model for indoor WiFi positioning enhancement,” 2007 6th International Conference on Information, Communications & Signal Processing, pp. 1-5, 2007.
W. Joram and L. B. Henry, “A theoretical model of UHF propagation in urban environments,” IEEE Transactions on Antenna and Propagation, vol. 36, no. 12, pp. 1788-1796, 1988.
K. Guan, Z. Zhong, B. Ai, and T. Kurner, “Semideterministic path-loss modeling for viaduct and cutting scenarios of high-speed railway,” IEEE Antennas and Wireless Propagation Letters, vol. 12, pp. 789-792, 2013.
A. Nešković, N. Nešković, and D. Paunović, “Modern approaches in modeling of mobile radio systems propagation environment,” IEEE Communications Surveys, Third Quarter, pp. 2-12, 2000.
R. Allan, “Application of FSS Structures to Selectively Control the Propagation of Signals into and out of Buildings Annex 2: Radio System Issues,” ERA Report 2004-0072 A2, ERA Project 51-CC-12033, Final Report, pp. 1-29, 2004.
P. Bernardi, R. Cicchetti, and O. Testa, “An accurate UTD model for the analysis of complex indoor radio environments in microwave WLAN systems,” IEEE Transactions on Antenna and Propagation, vol. 52, no. 6, pp. 1509-1520, 2004.
K. W. Chung, J.-M. Sau, and R. D. Murch, “A new empirical model for indoor propagation prediction,” IEEE Transactions on Vehicular Technology, vol. 47, no. 3, pp. 996-1001, 1998.
C. A. Balanis, Advanced Engineering Electromagnetics. Canada: John Wiley & Sons Inc., 1989.
R. Akl, D. Tummala, and X. Li, “Indoor propagation modeling at 2.4 GHz for IEEE 802.11 networks,” The Sixth IASTED International Multi-Conference on Wireless and Optical Communications, Wireless Networks and Emerging Technologies, Banff, AB, Canada, July 3-5, 2006.
E. M. Cheng, Z. Abbas, M. Fareq, S. F. Khor, K. Y. You, K. Y. Lee, M. S. Abdul Majid, and M. A. Rojan, “The effect of physical changes in a furnished indoor environment on wireless local area network (wlan) signals,” International Journal of Mechanical & Mechatronics Engineering IJMME-IJENS, vol. 14, no. 05, pp. 1-15, 2014.
