Research On High Precision Positioning Algorithm For Large Indoor Guard Mission

With the deepening of China’s internationalization process,many international conferences have been held in China in recent years,and China has become the global focus.With the maturity of indoor positioning technology,how to organize and implement conference security measures more effectively by means of current information technology is an important direction of security work.Because the indoor positioning technology is rarely used in the security work,a kind of indoor positioning system based on UWB ultra-broadband is proposed to serve the actual combat of security work.The main elements are as follows:Firstly,a variety of common indoor positioning techniques are studied,and different technologies are introduced.By understanding the development and trend of indoor positioning technology at home and abroad,the UWB ultra-wideband indoor positioning technology is used to locate the location.Secondly,By studying the basic theory of location,the method of bilateral two-way flight ranging is determined.In order to ensure the accuracy of positioning accuracy and for the actual non-line-of-sight（NLOS）error,Kalman and Taylor algorithms are combined to optimize the algorithm.An improved Kalman algorithm is designed,which can effectively decrease the non-line-of-sight（NLOS）error by improving the noise filtering.The simulation results show that the algorithm is effective.Finally,a positioning system based on the actual working environment is designed by using the algorithm.The system consists of UWB positioning base station,lower computer positioning software,upper computer monitoring software and so on.Field experiments show that the system has high positioning accuracy,meets the needs of working environment and has strong actual combat.