Seamless Cooperative Navigation Technology Based On Satellite And Wi-Fi

The increasing demand of location-based services,separate indoor or outdoor positioning navigation technology in indoor and outdoor junction due to the weak signal can not provide continuous navigation and positioning services,in order to solve the navigation and positioning in the process of indoor and outdoor environment changes discontinuous problems,thus the fusion between indoor and outdoor navigation and positioning technology application become the direction of research.In this study,Bei Dou positioning navigation is used outdoors,Wi-Fi location fingerprint positioning navigation is used indoors,and Bei Dou and Wi-Fi co-positioning navigation is used at the junction between indoor and outdoor.Expounds the positioning principle of Bei Dou and Wi-Fi,respectively the influence factors of navigation and positioning,and the fusion of collaborative navigation and positioning technology and the influencing factors of collaborative navigation and positioning,for navigation and positioning in the process of collaborative navigation and positioning,is proposed based on signal strength threshold algorithm,and weighted average method is introduced in the algorithm and kalman filtering methods to correct the result of the navigation and positioning.For navigation and positioning navigation and positioning in the process of mode switching,multiparameter weighting method is proposed based on cost function of the switching decision algorithm,by moving velocity,moving direction,the signal intensity of RSS,the Bei Dou satellite number and weight sum consumes memory parameters,choose the smaller values of the cost function of navigation and positioning model for target positioning navigation model.The simulation results show that the positioning accuracy of the cooperative positioning navigation mode based on the signal strength threshold algorithm is better than that of the single positioning navigation mode,and the multi-parameter switching algorithm based on the cost function can realize the effective switching between different indoor and outdoor positioning navigation modes and eliminate the ping-pong effect.Through the verification of the prototype system,the position labels on the map in the process of indoor and outdoor positioning and navigation are moved in real time and displayed on the map.The test results are consistent with the simulation results.By comparing the simulation results and test results,test results in the location on the map tag is a little deviation,this is due to the actual environment of Bei Dou and Wi-Fi in the same location point positioning is not completely consistent,and the actual conditions in the received signal of the terminal hardware each are not identical,but the overall model of collaborative navigation and positioning precision is better than the single navigation and positioning model,and switching cost function based on the parameters of the algorithm is able to effectively avoid positioning navigation mode switch to produce table tennis effect,improve the user experience.