I. F. Progri, W. Ortiz, W. R. Michalson and J. Wang, “The Performance and Simulation of an OFDMA Pseudolite Indoor Geolocation System,” Proceedings of 19th International Technical Meeting of the Satellite Division of the Institute of Navigation (ION GNSS’06), Fort Worth, September 2006, pp. 3149-3162.
 B. Alavi and K. Pahlavan, “Analysis of Undetected Direct Path in Time of Arrival Based UWB Indoor Geolocation,” Proceedings of IEEE 62nd Vehicular Technology Conference (VTC’05), Dallas, Vol. 4, September 2005, pp. 2627-2631.
 D. Cyganski, J. Orr and W. R. Michalson, “A Multi-Carrier Technique for Precision Geolocation for Indoor/Multipath Environments,” Proceedings of 16th International Technical Meeting of the Satellite Division of the Institute of Navigation (ION GPS/GNSS), Portland, September 2003, pp. 1069-1073.
 T. Gigl, G. J. M. Janssen, V. Dizdarevic, K. Witrisal and Z. Irahhauten, “Analysis of a UWB Indoor Positioning System Based on Received Signal Strength,” Proceedings of 4th Workshop on Positioning, Navigation and Communication (WPNC’07), Hannover, March 2007, pp. 97- 101.
 I. A. Ibraheem and J. Schoebel, “Time of Arrival Prediction for WLAN Systems Using Prony Algorithm,” Proceedings of 4th Workshop on Positioning, Navigation and Communication (WPNC’07), Hannover, March 2007, pp. 29-32.
 A. H. Quazi, “An Overview on the Time Delay Estimate in Active and Passive Systems for Target Localization,” IEEE Transactions on Acoustics, Speech & Signal Processing, Vol. 29, June 1981, pp. 527-533.
 C. D. Wann and S. H. Hsu, “Estimation and Analysis of Signal Arrival Time for UWB Systems,” Proceedings of IEEE 60th Vehicular Technology Conference (VTC’04), Los Angeles, Vol. 5, September 2004, pp. 26-29.
 G. M. R. I. Godaliyadda and H. K. Garg, “Versatile Algorithms for Accurate Indoor Geolocation,” Proceedings of 16th International Conference on Digital Signal Processing (DSP’09), Santorini, July 2008.
 A. Mandal, C. V. Lopes, T. Givargis, A. Haghighat, R. Jurdak and P. Baldi, “Beep: 3D Indoor Positioning Systems Using Audible Sound,” Proceedings of 2nd IEEE Consumer Communication and Networking Conference (CCNC’05), Las Vegas, January 2005, pp. 348-353.
 Y. Fukuju, M. Minami, H. Morikawa and T. Aoyama, “DOLPHIN: An Autonomous Indoor Positioning System in Ubiquitous Computing Environment,” Proceedings of IEEE Workshop on Software Technologies for Future Embedded Systems, Hakodate, May 2003, pp. 53-56.
 M. Kanaan and K. Pahlavan, “CN-TOAG: A New Algorithm for Indoor Geolocation,” Proceedings of 15th IEEE Symposium on Personal, Indoor and Mobile Radio Communication (PIMRC’04), Barcelona, Vol. 3, September 2004, pp. 1906-1910.
 K. Sayrafian-Pour and D. Kaspar, “Indoor Positioning Using Spatial Power Spectrum,” Proceedings of 16th IEEE Symposium on Personal, Indoor and Mobile Radio Communication (PIMRC’05), Berlin, Vol. 4, September 2005, pp. 2722-2726.
 A. Chehri, P. Fortier and P. M. Tardif, “Geolocation for UWB Networks in Underground Mines,” Proceedings of IEEE Annual Wireless and Microwave Technology Conference (WAMICON’06), Clearwater Beach, December 2006, pp. 1-4.
 D. H. Johnson and S. R. De Graaf, “Improving the Resolution Bearing in Passive Sonar Arrays by Eigen Value Analysis,” IEEE Transactions on Acoustics, Speech & Signal Processing, Vol. 3, August 1982, pp. 638-647.
 R. Roy and T. Kailath, “ESPRIT-Estimation of Signal Parameters via Rotational Invariance Techniques,” IEEE Transactions on Acoustics, Speech & Signal Processing, Vol. 37, No. 7, July 1989, pp. 984-995.
 R. Roy and T. Kailath, “Direction-of-Arrival Estimation by Subspace Rotation Methods – ESPRIT,” IEEE International Conference on Acoustics, Speech & Signal Processing (ICASSP’86), Tokyo, Vol. 11, April 1986, pp. 2495-2498.