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In this paper the problem of the joint statistical characterization of the NLOS bias and of the most representative features of LOS/NLOS UWB waveforms is investigated. In addition, the performance of various maximum-likelihood (ML) estimators for joint localization and NLOS bias mitigation is assessed. Our numerical results evidence that: a) the accuracy of all the considered estimators is appreciably affected by the LOS/NLOS conditions of the propagation environment; b) a statistical knowledge of multiple signal features can be exploited to mitigate the NLOS bias, so reducing the overall localization error.
Słowa kluczowe
Rocznik
Tom
Strony
11--17
Opis fizyczny
Bibliogr. 9 poz., rys.
Twórcy
autor
- Department of Information Engineering, University of Modena e Reggio
autor
- Department of Science and Methods for Engineering, University of Modena and Reggio Emilia
autor
- Department of Information Engineering, University of Modena e Reggio Emilia
Bibliografia
- [1] D. Dardari, A. Conti, J. Lien, and M. Z. Win, “The effect of cooperation on localization systems using UWB experimental data,” EURASIP J. Adv. Signal Process, vol. 2008, Jan. 2008. [Online]. Available: http://dx.doi.org/10.1155/2008/513873
- [2] S. Maranó, W. Gifford, H. Wymeersch, and M. Z. Win, “NLOS identification and mitigation for localization based on UWB experimental data,” IEEE J. Sel. Areas Commun., vol. 28, no. 7, pp. 1026 –1035, Sept. 2010.
- [3] N. Decarli, D. Dardari, S. Gezici, and A. A. D’Amico, “LOS/NLOS detection for UWB signals: A comparative study using experimental data,” in Proc. of the 5th IEEE International Symposium on Wireless Pervasive Computing (ISWPC 2010), May 2010, pp. 169 –173.
- [4] S. Venkatesh and R. Buehrer, “Non-line-of-sight identification in ultrawideband systems based on received signal statistics,” IET Microwaves, Antennas Propagation, vol. 1, no. 6, pp. 1120 –1130, Dec. 2007.
- [5] N. Alsindi, C. Duan, J. Zhang, and T. Tsuboi, “NLOS channel identification and mitigation in ultra wideband toa-based wireless sensornetworks,” in Proc. of the 6th Workshop on Positioning, Navigation and Communication (WPNC 2009), Mar. 2009, pp. 59 –66.
- [6] I. Güvenç, C.-C. Chong, F. Watanabe, and H. Inamura, “NLOS identification and weighted least-squares localization for UWB systems using multipath channel statistics,” EURASIP J. Adv. Signal Process, vol. 2008, Jan. 2008. [Online]. Available: http://dx.doi.org/10.1155/2008/271984
- [7] “WPR.B database,” Available online at http://www.vicewicom.eu.
- [8] J.-Y. Lee, “USC ranging test database,” Available online at http://ultra.usc.edu/uwb_database/ranging_test.htm.
- [9] D. Dardari, C.-C. Chong, and M. Z. Win, “Threshold-based time-ofarrival estimators in UWB dense multipath channels,” IEEE Trans.Commun., vol. 56, no. 8, pp. 1366 –1378, Aug. 2008.
Typ dokumentu
Bibliografia
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