Research Of Wireless Location Technology And Getparms Way In WCDMA System

With the rapid development of mobile location services, the technology of the mobile location has been one of the important features in the 3G mobile communication system. As the mainstream standard of 3G mobile communication system, the research of the wireless location is an important issue in WCDMA system.To satisfy consumer with the need in the wireless location, the thesis introduces three kinds of typical TDOA location algorithms in the WCDMA system, based on that, the CT and LA-WLS algorithms are put forward. The CT algorithm has higher location precision and smaller operation quantity, and the LA-WLS algorithm has the best location performance in some special environment. Meanwhile, to get higher location precision, the thesis research the getparms way in the WCDMA system. Because of considering the NLOS effect while improving on the algorithms, the thesis puts forward the new virtual base station algorithm to reduce NLOS interference and estimates the mobile poison with the CT algorithm. The emulational result shows that the algorithm is very effectual to decrease NLOS interference and the average location error.