TOA/TDOA Terminal Positioning Method In Mobile Communication Network

Cellular wireless location service is a new mobile value-added service with a good market future. Its basic Principle is oimplementmobile user location through estimating charactistics parameters relative top position p, includingtime-of-arrival. time-difference-of-arrival, dir ection-of-arrival, ect.First,we analyze the location service requirements and location technology in the 3G mobile communication system, propose an open location services architecture and structure model which provides end-to-end location service,and point out the design idea that location service and access network should be separated between each other,which also provides a system background for location algorithms design.then we present a TOA/TDOA data fusion model based on mathematical statistics for radiolocation in cellular network, and fuse TOA/TDOA measurement shrough a best linear fusion method and a mobile position based dynamic location algorithm, which shows good performance ofrobustness and accuracy.In order to improve adaptability and robustness of algorithms, we present another TOA/TDOA data fusion algorithm based on Support Vector Machine Regression for radiolocation.Then we test the capability of location estimation algorithm in distinct channel environments,the results suggest that the location precision within 125m is accessed with 70% probability by this method.