| With the popularization of the mobile device, the service offered by the mobile provider is more various, especially the wireless location attracts more people's attention nearly. The wireless location technology grasps man's sight intensively and research deeply in the world from the moment that FCC released the E-911 rule to order the mobile provider afford the certain precision's location service to the user. So the wireless location gets the rapid development.The performance of each traditional wireless location algorithm falls evidently by reason of the more great tolerance of TDOA,TOA,AOA ,the measurement eigenvalue of the electric wave related the location of the mobile device because of the effect of the reflection ,refraction ,dispersion ,the multi-path of the electric wave under the wireless net environment. Because of this, the thesis focuses on improving the accuracy of the location and concentrates on the TDOA to profound the research on the wireless location by rule of amending the fundamental algorithms, improving the traditional hybrid location algorithms and location based on the data fusion technology.The thesis mainly researches on the following area based on the introduction of the basic background knowledge and basic location technology. The region as fellows:1,Based on the Chan, adding the amend factor to decrease the infection of the NLOS gradually ,and so we can make the traditional location algorithm get the higher location accuracy under the NLOS environment.2,Based on the traditional hybrid location, making the algorithm not sensitive to the affection of NLOS by adding the amend factor, and so we can make the traditional hybrid location algorithm get the higher location accuracy under the NLOS environment and captures the better adaptation.3,Based on the model of Kleine-Ostmann, we offer the new data fusion model to location, and the model can improve the location accuracy efficiently under the NLOS environment ,and possesses the low complexity. |
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