Research On Location Finding Based On The Third Generation Mobile Communication System

With the rapid development of mobile communication, we have been stepping in the third generation of mobile communication (3G) recently. That will bring about the more superior quality of voice, the more colorful multimedia services and the more added values. At the same time, it becomes necessary that the function of mobile station location can he provided. The research on location service has been a hot point.The mobile station location technologies in wireless communication system involve many techniques and extend to broad areas. This paper discusses mainly the location technology based on TDOA and AOA in WCDMA system. Firstly, the location technology is analyzed and summarized. Location with TDOA is the most promising method in WCDMA system at present. Besides, smart antenna will be implemented in 3G, and location with smart antenna will achieve better precision. An effective location system designs for TDOA/AOA is presented in this paper.Algorithm involved in the designs is discussed and analyzed, which are compared and chosen by simulation to optimize the designs. The algorithm of Chan, which is for solving TDOA location equations, is extended to solve hybrid TDOA/AOA location equations. All the algorithms above are simulated and analyzed before reaching last conclusions.The simulation results prove the proposals discussed in this paper are valid. In particular, TDOA/AOA method using achieves better location performance and improves location success probability and location estimation precision.