Wireless Location Of Non Line-of-Sight Interference Resistance Of The Algorithm

Wireless location is a solution by radio signal, access to relevant parameters, and positioning the solution of the technology. As the U.S.E-911 motion of the issue, communications company and research institutions increase big wireless location technology, make this technology get fast development. Combining all kinds of wireless signals, such as the Chirp signal, Zigbee signal, UWB signals, and communication system as the frequency of the signal, make wireless location can be used in different areas, rich people’s life. How to improve the precision of the wireless location let the public service better than ever is the key to wireless location.Make mobile positioning need two steps, the first step according to different types of positioning type, estimate the position of the corresponding parameters, the second step, according to the first step positioning parameters estimation, and put forward the corresponding localization algorithm for mobile position estimation. Modern wireless communication environment (especially in the city of mobile environment) because get the non line-of-sight (NLOS) multipath dissemination, the geometry precision factor and so on many kinds of adverse factors, make the existing each mobile terminal (MS) positioning method will inevitably suffer a lot of influence, resulting in the performance of the positioning decreased significantly, the difficult to non line-of-sight in multipath conditions meet E-911 position precision requirements.This thesis mainly to the wireless positioning process of the second step, overcome multipath environment non line-of-sight positioning error, and put forward the high precision wireless location algorithms and its performance analysis. First analysis non line-of-sight multipath spread to TOA/TDOA algorithm is significantly influence, and on this basis to overcome significant error wireless locating new algorithm. First overcome the orientation of non line-of-sight error algorithm is based on classical Chan and Taylor algorithm with the localization algorithm. And then using elliptical model SLR shoot, and puts forward a kind of inhibition of spread beyond (NLOS) interference location algorithm. Through numerical simulation analysis the effectiveness of the proposed algorithm.. At last, the paper concludes the full text, and future research direction to make outlook.