中文摘要：

设计并实现了用于大规模室内环境的移动终端定位与智能导航系统.系统基于RFID技术和TDOA原理测量距离,并通过三点定位技术实现对手持移动终端的精确定位.在此基础上引入A~＊搜索算法,以完成对手持终端设备准确、高效的导航.实验表明,该系统具有准确的测距与定位功能,能满足室内定位的要求.

英文摘要：

A localization method and an intelligent navigation system for the large-scale indoor environment is presented.This system is based on RFID technology and the TDOA （Time Difference of Arrival） between radiofrequency and ultrasonic signals to estimate distance, and employs a three-point localization technology to achieve accurate position estimation of the hand-held mobile terminals.Then A~＊ search algorithm is introduced to realize accurate and efficient navigation.As the experiment proves,this system can provide the average 3 cm distance estimation precision,which is able to meet the requirements of indoor localization.