Optimal Station Layout Method for 3D Indoor Positioning System Based on Error Probability
With the continuous development of intelligent and automation technology,the application scenarios of indoor positio-ning technology are becoming more and more extensive,and how to improve the accuracy and reliability of indoor positioning sys-tem has always been a hot research issue.Optimization of the base station layout to improve the overall positioning accuracy of the system is one of the existing optimization methods for indoor positioning systems.For this method,the existing studies gener-ally choose to adopt the existing methods in other similar fields.Among the main two methods,the dilution of precision used to evaluate satellite conjugation ignores the distance between the base station and the tag;the error probability used as the evaluation factor for the accuracy of fall points in missile and inertial navigation system does not consider the influence of the geometric structure of the base stations.In this regard,an accuracy evaluation model based on dilution of precision and error probability is proposed for deriving the optimal base station layout of 3D indoor positioning system,which can be well applied to the field of in-door positioning by considering the influence of both distance and geometric structure on indoor positioning accuracy.The pro-posed method achieves excellent results in both program simulation and actual positioning experiments.In the program simula-tion,the average value of positioning error of the optimal base station layout system is reduced by about 14.38％compared with that of the traditional four-top-angle positioning system,and in the actual positioning experiments,the positioning accuracy and effectiveness of the optimal layout are significantly improved.Experimental results verify the accuracy and practicality of the ac-curacy evaluation model.The proposed optimal base station layout method has high application value and universality in the field of 3D indoor positioning,and can effectively improve the accuracy and effectiveness of positioning systems.
Indoor positioningOptimal station layout methodPosition dilution of precisionEllipsoid error probableUltra wide band
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