Weitere Artikel dieser Ausgabe durch Wischen aufrufen
In this paper, a new time-domain (TD) model is proposed for multiple scattering of ultra wideband (UWB) signals through lossy obstacles. Propagation through structures like wedge, single building, and double buildings is presented where buildings are supposed to have rectangular cross sections. Considering two-dimesnional (2-D) and realistic three-dimensional (3-D) scenarios, first an accurate path-tracing algorithm is proposed for multiple scattering of UWB signals through different 2-D and 3-D scenarios and then, TD solution is presented for realistic multiple scattering problems where a single ray-path can undergo diffraction, transmission, and reflection successively. Results are shown for both soft and hard polarizations. Considering Gaussian doublet pulse, the accuracy of the presented TD solution is confirmed by comparing the TD results with the numerical inverse fast Fourier transform (IFFT) of the corresponding frequency-domain (FD) results. It has been found that the field strength at the receiver (Rx) undergoes significant attenuation and distortion for different multiple scattering scenarios. For an in-depth analysis of pulse distortion at Rx, the UWB channel impulse response is analyzed for multiple scattering scenario. Power profile for multiple scattering scenario is also observed to signify the received power at the Rx. To characterize the multipath propagation, UWB multipath is analyzed in terms of time dispersion parameters like mean excess delay and root mean square delay spread. Further to confirm the generality of the proposed TD solution, the results are shown for a variety of other UWB pulses like monocycle and fourth-order Gaussian monocycle pulses. Finally, the computational efficiency of the TD and IFFT-FD methods is compared.
Bitte loggen Sie sich ein, um Zugang zu diesem Inhalt zu erhalten
Sie möchten Zugang zu diesem Inhalt erhalten? Dann informieren Sie sich jetzt über unsere Produkte:
FCC first report and order: In the matter of revision of part 15 of the comparison’s rules regarding ultra-wideband transmission system, FCC 02-48, April 2002.
Molisch, A. F. (2005). Ultrawideband propagation channels-theory, measurement, and modelling. IEEE Transactions on Vehicular Technology, 54(5), 1528–1545. CrossRef
Batra, A., et al. (2003). Multi-Band OFDM physical layer proposal. Document IEEE 802.15-03/267r2.
Win, M. Z., & Scholtz, R. A. (1998). On the energy capture of ultrawide bandwidth signals in dense multipath environments. IEEE Communications Letters, 2(9), 245–247. CrossRef
Gezici, S., Tian, Z., Giannakis, G. B., Kobayashi, H., Molisch, A. F., Poor, H. V., et al. (2005). Localization via ultra-wideband radios. IEEE Signal Processing Magazine, 22(4), 70–84. CrossRef
Mireles, F. R. (2001). Performance of ultrawideband SSMA using time hopping and M-ary PPM. IEEE Journal on Selected Areas in Communications, 19(6), 1186–1196. CrossRef
Santos, T., Karedal, J., Almers, P., Tufvesson, F., & Molisch, A. F. (2010). Modeling the ultra-wideband outdoor channel: Measurements and parameter extraction method. IEEE Transactions on Wireless Communications, 9(1), 282–290. CrossRef
Qiu, R. C. (2004). A generalized time domain multipath channel and its application in ultra-wideband (UWB) wireless optimal receiver design—Part II: Physics-based system analysis. IEEE Transactions on Wireless Communications, 3(6), 2312–2324. CrossRef
Al-Samman, A. M., Chude-Okonkwo, U. A. K., Ngah, R., & Nunoo, S. (2014). Experimental characterization of an UWB channel in outdoor environment. In Proceedings of the 10th International Colloquium on Signal Processing & its Applications (CSPA2014) (pp. 91–94), Kuala Lumpur, Malaysia.
Lee, J. Y. (2010). UWB channel modeling in roadway and indoor parking environments. IEEE Transactions of Vehicular Technology, 59(7), 3171–3180. CrossRef
Liang, J., & Liang, Q. (2010). Outdoor propagation channel modeling in foliage environment. IEEE Transactions on Vehicular Technology, 59(5), 2243–2252. CrossRef
Anderson, C. R., Volos, H. I., & Buehrer, R. M. (2013). Characterization of low-antenna ultrawideband propagation in a forest environment. IEEE Transactions on Vehicular Technology, 62(7), 2878–2895. CrossRef
Al-Samman, A. M., Rahman, T. A., Nunoo, S., Chude-Okonkwo, U. A. K., Ngah, R., Shaddad, R. Q., et al. (2015). Experimental characterization and analysis for ultra wideband outdoor channel. Wireless Personal Communications, 83(1), 3103–3118. CrossRef
Dezfooliyan, A., & Weiner, A. M. (2012). Evaluation of time domain propagation measurements of UWB systems using spread spectrum channel sounding. IEEE Transactions on Antennas and Propagation, 60(10), 4855–4865. CrossRef
Irahhauten, Z., Nikookar, H., & Janssen, G. (2004). An overview of ultra wide band indoor channel measurements and modeling. IEEE Microwave and Wireless Components Letters, 14(8), 386–388. CrossRef
Molisch, A. F. (2009). Ultra-wide-band propagation channels. Proceedings of the IEEE, 97(2), 353–371. CrossRef
Ghassemzadeh, S. S., Greenstein, L. J., Kavcic, A., Sveinsson, T., & Tarokh, V. (2003). An empirical indoor path loss model for ultra-wideband channels. Journal of Communication Network, 5(4), 303–308. CrossRef
Noori, N., Karimzadeh-Baee, R., & Abolghasemi, A. (2009). An empirical ultra wideband channel model for indoor laboratory environments. Radioengineering, 18(1), 68–74.
Qiu, R. C., Liu, H., & Shen, X. (2005). Ultra-wideband for multiple access communications. IEEE Communications Magazine, 43(2), 80–87. CrossRef
Qiu, R. C., Zhou, C., & Liu, Q. (2005). Physics-based pulse distortion for ultra-wideband signals. IEEE Transactions on Vehicular Technology, 54(5), 1546–1555. CrossRef
Qiu, R. C. (2002). A study of the ultra-wideband wireless propagation channel and optimum UWB receiver design. IEEE Journal on Selected Areas in Communications, 20(9), 1628–1637. CrossRef
Qiu, R. C. (2006). A generalized time domain multipath channel and its application in ultra-wideband (UWB) wireless optimal receiver design—Part III: System performance analysis. IEEE Transactions on Wireless Communications, 5(10), 2685–2695. CrossRef
Karousos, A., & Tzaras, C. (2008). Multiple time-domain diffraction for UWB signals. IEEE Transactions on Antennas and Propagation, 56(5), 1420–1427. CrossRef
Tewari, P., Soni, S., & Bansal, B. (2014). Time-domain solution for transmitted field through low-loss dielectric obstacles in a microcellular and indoor scenario for UWB signals. IEEE Transactions on Vehicular Technology, 64(2), 541–552. CrossRef
Bansal, B., & Soni, S. (2015). A new time-domain corner diffraction coefficient for metallic and dielectric objects for UWB signals. Microwave and Optical Technology Letters, 57(7), 1760–1765. CrossRef
Kouyoumjian, R. G., & Pathak, P. H. (1974). A uniform geometrical theory of diffraction for an edge in a perfectly conducting surface. Proceedings of the IEEE, 62(11), 1448–1461. CrossRef
Rousseau, P. R., & Pathak, P. H. (1995). Time-domain uniform geometrical theory of diffraction for a curved wedge. IEEE Transactions on Antennas and Propagation, 43(12), 1375–1382. CrossRef
Górniak, P., & Bandurski, W. (2008). Direct time domain analysis of an UWB pulse distortion by convex objects with the slope diffraction included. IEEE Transactions on Antennas and Propagation, 56(9), 3036–3044. CrossRef
Barnes, P. R., & Tesche, F. M. (1991). On the direct calculation of a transient plane wave reflected from a finitely conducting half space. IEEE Transactions on Electromagnetic Compatibility, 33(2), 90–96. CrossRef
Attiya, A. M., & Safaai-Jazi, A. (2004). Simulation of ultra-wideband indoor propagation. Microwave and Optical Technology Letters, 42(2), 103–108. CrossRef
Jong, Y. L. C. D., Koelen, M. H. J. L., & Herben, M. H. A. J. (2004). A building-transmission model for improved propagation prediction in urban microcells. IEEE Transactions on Vehicular Technology, 53(2), 490–502. CrossRef
Chen, Z., Yao, R., & Guo, Z. (2004). The characteristics of UWB signal transmitting through a lossy dielectric slab. In Proceedings of the IEEE 60th Vehicular Technology Conference, VTC 2004- Fall (Vol. 1, pp. 134–138). Los Angeles, CA, USA.
Yang, W., Qinyu, Z., Naitong, Z., & Peipei, C. (2007). Transmission characteristics of ultra-wide band impulse signals. In Proceedings of the IEEE International Conference on Wireless Communications Networking and Mobile computing (pp. 550–553). Shanghai.
Yang, W., Naitong, Z., Qinyu, Z., & Zhongzhao, Z. (2008). Simplified calculation of UWB signal transmitting through a finitely conducting slab. Journal of Systems Engineering and Electronics, 19(6), 1070–1075. CrossRef
Bansal, B., & Soni, S. (2014). A new time-domain solution to transmission through a multilayer low-loss dielectric wall structure for UWB signals. Wireless Personal Communications, 79(1), 581–598. CrossRef
Brigham, E. O. (1988). The fast Fourier transform and its applications. New Jersey: Prentice Hall.
Sevgi, L. (2007). Numerical Fourier transforms: DFT and FFT. IEEE Antennas and Propagation Magazine, 49(3), 238–243. CrossRef
Chauhan, P. S., Soni, S., & Shanker, Y. (2013). A novel approach to predict field strength in the shadow of a 3-D building scenario. Wireless Personal Communications, 70(4), 1683–1695. CrossRef
Remcom. (2008). Wireless insite, site-specific radio propagation prediction software user’s manual version 2.3. State College, PA.
Balanis, C. A. (1989). Advanced engineering electromagnetic. New York: Wiley.
Hu, B., & Beaulieu, N. C. (2005). Pulse shapes for ultrawideband communication systems. IEEE Transactions on Wireless Communications, 4(4), 1789–1797. CrossRef
Pepe, D., Aluigi, L., & Zito D. (2016). Sub-100 ps monocycle pulses for 5G UWB communications. In Proceedings of the 10th European Conference on Antennas and Propagation (EuCAP) (pp. 1–4). Davos.
Ahmadi-Shokouh, J., & Qiu, R. C. (2009). Ultra-wideband (UWB) communications channel measurements—A tutorial review. International Journal of Ultra Wideband Communications and Systems, 1(1), 11–31. CrossRef
Rappaport, T. S. (1996). Wireless communications: Principles and practice. Upper Saddle River: Prentice Hall PTR. MATH
- A New Time-Domain Model for Multiple Scattering of UWB Signals Through Lossy Obstacles
- Springer US