Network-based Mobile Communications System, The Mobile Station Positioning Technology

Along with the rapid development of the mobile communication technology, more and more subscribers want mobile communications systems to provide location services in recent years. In July 1996 US Federal Communication Commission (FCC) issued the E-911 mandate stating that all wireless carriers must provide the geolocation of an emergency 911 caller to the appropriate public safety answering point. In Oct. 1999 the FCC issued the E-911 Third report and Order, which adopt the revised standards for Phase II location accuracy ─For network-based solutions: 100 meters for 67% of callers, 300 meters for 95% of callers. The mobile location technique becomes one of the hottest techniques in recent years. Due to a lot of inherent advantage of it, CDMA has become the main multi access system for the 3 generation mobile communication system. The network-based TDOA location technique is the prevailing location technique in CDMA system. In this thesis, based on the analysis of CDMA system and location techniques the author's main contributions include* Has summarized and analyzed the principle of the mobile location.* Has analyzed the common used channel models which are very useful for research, simulation and assessment of mobile location techniques.* Has designed a network-based mobile location simulator based on simulink and the simulation test on TDOA technique has been made and the results have been analyzed.* At the end of this thesis, the simulation of correlator of received signals with FPGA has made.