Wi-Fi indoor positioning method based on evidence synthesis rule optimization
An indoor positioning and rule technology, applied in the services, electrical components, wireless communication and other directions based on a specific environment, can solve problems such as effective estimation of the signal propagation distance of the positioning system, deterioration of the performance of the positioning system, and poor robustness.
Active Publication Date: 2020-11-10
CHONGQING UNIV OF POSTS & TELECOMM
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[0004] However, because indoor scenes are usually very complex, indoor signals are usually diverse, which affects the effective estimation of the signal propagation distance by the positioning system, resulting in poor performance and poor robustness of the positioning system.
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[0075] Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the diagrams provided in the following embodiments are only schematically illustrating the basic concept of the present invention, and the following embodiments and the features in the embodiments can be combined with each other in the case of no conflict.
[0076] Wherein, the accompanying drawings are for illustrative purposes only, and represent only schematic diagrams, rather than physical drawings, and should...
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The invention relates to a Wi-Fi indoor positioning method based on evidence synthesis rule optimization, and belongs to the technical field of indoor positioning. The method comprises the following steps: firstly, resuming a relationship state set of each reference point and a target position, and correcting an RSS sample mean value by utilizing a boundary error checking method; secondly, takingnormalized signal propagation distance distribution estimation as basic probability assignment of a DS evidence theory, and establishing initial trust of a relationship state between each reference point and a target position; multi-source RSS information is fused based on a DS evidence synthesis rule to obtain comprehensive trust estimation of each reference point, and meanwhile, an ideal reference point is selected by utilizing a trust function based on a DS evidence theory; and screening an ideal reference point with high trust degree as an ideal matching reference point according to a decision rule of a trust function, and estimating a target position in combination with a centroid algorithm. On one hand, the precision of the positioning system is optimized, and on the other hand, thestability and reliability of the positioning result are improved.
Description
technical field [0001] The invention belongs to the technical field of indoor positioning, and relates to a Wi-Fi indoor positioning method optimized based on evidence synthesis rules. Background technique [0002] In recent years, with the surge in demand for indoor Location-based Service (LBS), indoor positioning systems have played an important role in many application scenarios, such as large storage warehouses, underground shopping malls, garage navigation, etc. Pedestrian localization and navigation in . Because it is difficult to collect satellite signals such as Global Positioning System (GPS) and Beidou continuously and without fluctuations in the indoor environment, because satellite positioning systems usually cannot meet the positioning performance requirements of indoor location services. In addition, common infrared (Infrared Ray, IR), Bluetooth, ZigBee [4], ultra-wideband (Ultra Wide Band, UWB) indoor positioning systems, etc. usually need to deploy many addi...
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IPC IPC(8): H04W4/33H04W64/00
CPCH04W4/33H04W64/00
Inventor 周牧李欣玥王勇谢良波聂伟杨小龙
Owner CHONGQING UNIV OF POSTS & TELECOMM