［1］ BAHL P, PADMANABHAN V N. RADAR: an inbuilding RFbased user location and tracking system［C］∥ Proceeding of IEEE INFOCOM. Israel: IEEE, 2000: 775-789．
［2］ HAZAS M, HOPPER A. Broadband ultrasonic location systems for improved indoor positioning［J］. IEEE Transactions on Mobile Computing, 2006, 5(5): 536-547．
［3］ CHENG Y, CHAWATHE Y, LAMARCA A. Accuracy characterization for metropolitanscale WiFi localization［C］∥ Proceeding of MobiSys. Seattle: ACM, 2005: 233-245．
［4］ Ascension technology corporation ［EB/OL］. ［2009-12-01］. http:∥www.ascensiontech.com．
［5］ GONCALO G, HELENA S. Indoor location system using ZigBee technology［C］∥ Proceeding of International Conference on Sensor Technologies and Applications. Washington: IEEE, 2009:152-157．
［6］ CHEHRI A, FORTIER F, TARDIF P M. On the TOA estimation for UWB ranging in complex confined area［C］∥ Proceeding of International Symposium on Signals, Systems and Electronics.［S.l.］: IEEE, 2007: 533-536．
［7］ PENG R, SICHITIU M L. Angle of arrival localization for wireless sensor networks［C］∥ Proceeding of IEEE Communications Society on Sensor and Ad Hoc Communications and Networks. ［S.l.］:IEEE, 2006: 374-382．
［8］ TAKENQA C M, KYAMAKY. A robust positioning system based on fingerprint approach［C］∥ Proceeding of ACM International Workshop on Mobility Management and Wireless Access. Greece: ACM, 2007: 1-8．
［9］ CHEN Y, YANG Q, Yin J, et al. Powerefficient accesspoint selection for indoor location estimation［J］. IEEE Transactions on Knowledge and Data Engineering, 2006, 18(7): 877-888．
［10］ ISKANDER M F, YUN Z. Propagation prediction models for wireless communication systems［J］. IEEE Transactions on Microwave Theory and Techniques, 2002, 50(3): 662-673．
［11］ 施亚妮, 李丽娟. FDTD方法吸收边界条件的研究及应用［J］. 计算机仿真, 2008, 25(7): 113-148．
SHI Yani, LI Lijuan. Research on absorbing boundary condition in FDTD method and its application［J］. Computer Simulation, 2008, 25(7): 113-148．

［12］ YUAN M, ARIJIT D, JUNG B H. Conditions for generation of stable and accurate hybrid TDFD MoM solutions［J］.IEEE Transactions on Microwave Theory and Techniques, 2006, 54(1): 2552-2563．
［13］ 黄永明, 吕英华, 徐立,等. 室内无线传播中一种混合建模方法的改进［J］. 北京邮电大学学报, 2004, 27(1): 13-17．
HUANG Yongming, LU Yinghua, XU Li, et al. An improved hybrid method for modeling indoor radio propagation［J］. Journal of Beijing University of Posts and Telecommunications, 2004, 27(1): 13-17．
［14］ Friis transmission equation ［EB/OL］. ［2009-12-01］．http:∥en.wikipedia.org/wiki/Friis_transmission_equation．
［15］ LASSABE F, CANALDA P, CHATONNAY P, et al. A Friisbased calibrated model for WiFi terminals positioning［C］∥ Proceeding of IEEE International Symposium on a World of Wireless Mobile and Multimedia Networks. Taormina: IEEE, 2005: 382-387．
［16］ AKL R, TUMMALA D, LI X. Indoor propagation modeling at 24GHz for IEEE 80211 networks［C］∥ Proceeding of IASTED International MultiConference on Wireless and Optical Communications, Wireless Networks and Emerging Technologies. Banff: IASTED/ACTA, 2006: 14-19．
［17］ MEDBO J, BERG J E. Simple and accurate path loss modeling at 5GHz in indoor environments with corridors［C］∥ Proceeding of IEEE Vehicular Technology Conference.［S.l.］: IEEE, 2000: 30-36．
［18］ WANG Y, JIA X, LEE H K. An indoors wireless positioning system based on wireless local area network infrastructure［C］∥ Proceeding of International Symposium on Satellite Navigation Technology Including Mobile Positioning and Location Services. Melbourne: SatNav, 2003: 21-34．
［19］ AAMODT B K. CC2431 location engine［S］. Texas: Application Note AN042, 2006．
［20］ EDWARDS A A, DENNIS J A. Polyfit  a computer program for fitting a specified degree of polynomial to data points［R］. London:UK  National Radiological Protection Board, NRPBM 11, 1973．
［21］ KEYS R G. Cubic convolution interpolation for digital image processing［J］. IEEE Transactions on Acoustics, Speech and Signal Processing, 1981, 29(6): 1153-1160.