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  • Research Article
  • Open Access

A Comprehensive Evaluation of Indoor Ranging Using Ultra-Wideband Technology

EURASIP Journal on Wireless Communications and Networking20072007:086031

  • Received: 1 May 2006
  • Accepted: 15 February 2007
  • Published:


Ultra-wideband technology shows promise for precision ranging due to its fine time resolution to resolve multipath fading and the presence of lower frequencies in the baseband to penetrate walls. While a concerted effort has been conducted in the extensive modeling of the indoor UWB channel in recent years, to our knowledge only two papers have reported ranging performance, but for limited range and fixed bandwidth and center frequency. In principle, boosting power can guarantee connectivity between transmitter and receiver, but not precision due to the distorting effects of walls and other objects in the direct path. In order to gauge the limits of UWB ranging, we carry out 5000 measurements up to an unprecedented 45 m in non-line-of-sight conditions in four separate buildings with dominant wall material varying from sheet rock to steel. In addition, we report performance for varying bandwidth and center frequency of the system.


  • Time Resolution
  • Center Frequency
  • Limited Range
  • Direct Path
  • Comprehensive Evaluation


Authors’ Affiliations

Wireless Communication Technologies Group, National Institute of Standards and Technology, Gaithersburg, MD 20899-1070, USA


  1. Molisch AF: Ultrawideband propagation channels-theory, measurement, and modeling. IEEE Transactions on Vehicular Technology 2005,54(5):1528-1545. 10.1109/TVT.2005.856194View ArticleGoogle Scholar
  2. Cassioli D, Win MZ, Molisch AF: The ultra-wide bandwidth indoor channel: from statistical model to simulations. IEEE Journal on Selected Areas in Communications 2002,20(6):1247-1257. 10.1109/JSAC.2002.801228View ArticleGoogle Scholar
  3. Irahhauten Z, Nikookar H, Janssen GJM: An overview of ultra wide band indoor channel measurements and modeling. IEEE Microwave and Wireless Components Letters 2004,14(8):386-388.View ArticleGoogle Scholar
  4. Yano SM: Investigating the ultra-wideband indoor wireless channel. The 55th of IEEE Vehicular Technology Conference (VTC '02), May 2002, Birmingham, Ala, USA 3: 1200-1204.Google Scholar
  5. Durantini A, Ciccognani W, Cassioli D: UWB propagation measurements by PN-sequence channel sounding. IEEE International Conference on Communications (ICC '04), June 2004, Paris, France 6: 3414-3418.Google Scholar
  6. Durantini A, Cassioli D: A multi-wall path loss model for indoor UWB propagation. The 61st of IEEE Vehicular Technology Conference (VTC '05), May-June 2005, Stockholm, Sweden 1: 30-34.Google Scholar
  7. Prettie C, Cheung D, Rusch L, Ho M: Spatial correlation of UWB signals in a home environment. IEEE Conference on Ultra Wideband Systems and Technologies (UWBST '02), May 2002, Baltimore, Md, USA 65-69.Google Scholar
  8. Kunisch J, Pump J: Measurement results and modeling aspects for the UWB radio channel. IEEE Conference on Ultra Wideband Systems and Technologies (UWBST '02), May 2002, Baltimore, Md, USA 19-24.Google Scholar
  9. Keignart J, Daniele N: Subnanosecond UWB channel sounding in frequency and temporal domain. IEEE Conference on Ultra Wideband Systems and Technologies (UWBST '02), May 2002, Baltimore, Md, USA 25-30.Google Scholar
  10. Ghassemzadeh SS, Greenstein LJ, Sveinsson T, Kavčić A, Tarokh V: UWB delay profile models for residential and commercial indoor environments. IEEE Transactions on Vehicular Technology 2005,54(4):1235-1244. 10.1109/TVT.2005.851379View ArticleGoogle Scholar
  11. Molisch AF, Balakrishnan K, Cassioli D, et al.: A comprehensive model for ultrawideband propagation channels. IEEE Global Telecommunications Conference (GLOBECOM '05), November-December 2005, St. Louis, Mo, USA 6: 3648-3653.Google Scholar
  12. Gentile C: Sensor location through linear programming with triangle inequality constraints. IEEE International Conference on Communications (ICC '05), May 2005, Seoul, Korea 5: 3192-3196.Google Scholar
  13. Denis B, Keignart J, Daniele N: Impact of NLOS propagation upon ranging precision in UWB systems. IEEE Conference on Ultra Wideband Systems and Technologies (UWBST '03), November 2003, Reston, Va, USA 379-383.Google Scholar
  14. Denis B, Daniele N: NLOS ranging error mitigation in a distributed positioning algorithm for indoor UWB ad-hoc networks. International Workshop on Wireless Ad-Hoc Networks (IWWAN '04), May-June 2004, Oulu, Finland 356-360.Google Scholar
  15. Lee J-Y, Scholtz RA: Ranging in a dense multipath environment using an UWB radio link. IEEE Journal on Selected Areas in Communications 2002,20(9):1677-1683. 10.1109/JSAC.2002.805060View ArticleGoogle Scholar
  16. Cassioli D, Durantini A, Ciccognani W: The role of path loss on the selection of the operating bands of UWB systems. The 15th of IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC '04), September 2004, Barcelona, Spain 4: 2787-2791.Google Scholar
  17. Hashemi H: Indoor radio propagation channel. Proceedings of the IEEE 1993,81(7):943-968. 10.1109/5.231342View ArticleGoogle Scholar
  18. Muqaibel A, Safaai-Jazi A, Bayram A, Attiya AM, Riad SM: Ultrawideband through-the-wall propagation. IEE Proceedings: Microwaves, Antennas & Propagation 2005,152(6):581-588. 10.1049/ip-map:20050092Google Scholar
  19. Li X, Pahlavan K: Super-resolution TOA estimation with diversity for indoor geolocation. IEEE Transactions on Wireless Communications 2004,3(1):224-234. 10.1109/TWC.2003.819035View ArticleGoogle Scholar
  20. Hentilä L, Hovinen V, Hämäläinen M: Sub-band analysis in UWB radio channel modeling. Proceedings of Nordic Radio Symposium/Finnish Wireless Communications Workshop (NRS/FWCW '04), August 2004, Oulu, Finland 1-5.Google Scholar
  21. Morrison G, Fattouche M: Super-resolution modeling of the indoor radio propagation channel. IEEE Transactions on Vehicular Technology 1998,47(2):649-657. 10.1109/25.669102View ArticleGoogle Scholar
  22. Matzner R, Letsch K: SNR estimation and blind equalization (deconvolution) using the kurtosis. Proceedings of IEEE-IMS Workshop on Information Theory and Statistics (WITS '94), October 1994, Alexandria, Va, USA 68.Google Scholar
  23. Guvenc I, Sahinoglu Z: Threshold-based TOA estimation for impulse radio UWB systems. Proceedings of IEEE International Conference on Ultra-Wideband, Conference (ICU '05), September 2005, Zurich, Switzerland 420-425.Google Scholar
  24. Guvenc I, Sahinoglu Z: Threshold selection for UWB TOA estimation based on kurtosis analysis. IEEE Communications Letters 2005,9(12):1025-1027. 10.1109/LCOMM.2005.1576576View ArticleGoogle Scholar
  25. Falsi C, Dardari D, Mucchi L, Win MZ: Time of arrival estimation for UWB localizers in realistic environments. EURASIP Journal on Applied Signal Processing 2006, 2006: 13 pages.Google Scholar
  26. Low ZN, Cheong JH, Law CL, Ng WT, Lee YJ: Pulse detection algorithm for line-of-sight (LOS) UWB ranging applications. IEEE Antennas and Wireless Propagation Letters 2005,4(1):63-67. 10.1109/LAWP.2005.844145View ArticleGoogle Scholar
  27. Zwierzchowski S, Jazayeri P: A systems and network analysis approach to antenna design for UWB communications. Proceedings of IEEE International Symposium on Antennas and Propagation Society (APS '03), June 2003, Columbus, Ohio, USA 1: 826-829.Google Scholar


© C. Gentile and A. Kik. 2007

This article is published under license to BioMed Central Ltd. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.