1. A survey on sensor networks
2. [2] R. Yamasaki, A. Ogino, T. Tamaki, T. Uta, N. Matsuzawa, and T. Kato, “TDOA Location System for IEEE 802.11b WLAN,” Proc. 2005 IEEE Wireless Commun. and Networking Conf., pp.2338-2343, New Orleans, LA, March 2005.
3. Impulse radio: how it works
4. [4] K. Kitamura and Y. Sanada, “Experimental Investigation of an IR-UWB Positioning System with Comparators,” IEICE Trans. Fundamentals, vol.E90-A, no.11, pp.2354-2360, Nov. 2007.
5. [5] W.C. Headley, C.R.C.M. da Silva, and R.M. Buehrer, “Indoor location positioning of non-active objects using ultra-Wideband Radios,” IEEE Radio and Wireless Symposium, pp.105-108, Jan. 2007.