Indoor positioning method and system

An indoor positioning and positioning range technology, which is applied in the direction of location information-based services, electrical components, wireless communication, etc., can solve the problems of poor portability, low positioning accuracy, and poor accuracy

Active Publication Date: 2016-11-23
XIANGTAN UNIV
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Problems solved by technology

[0005] However, some of the above methods have some disadvantages: 1. The indoor positioning method using inertial sensors needs to determine the initial position and initial direction of the indoor moving target, which has limitations.
2. Fingerprint positioning requires a lot of signal streng

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  • Indoor positioning method and system

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[0052] In order to be able to describe the technical content of the present invention more clearly, further description will be given below in conjunction with specific embodiments.

[0053] Such as figure 2 As shown, indoor positioning due to the barrier of the wall, the signal transmission structure under the NLOS situation will change, and the signal loss after passing through the wall is different due to the difference of the wall structure and type. Therefore, in the present invention, under a certain indoor environment, for a certain point in the room, areas with the same signal loss can be partitioned, and the wall combination with the least loss can be selected as the optimal wall combination according to different areas. The position information and distance information of the station are corrected. In the process of not adding positioning steps, the updated precise coordinates are obtained only through the analysis and processing of the data, so as to achieve accurate p...

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Abstract

The invention relates to an indoor positioning method and system, wherein the indoor positioning method comprises the steps of primary distance measurement, and precise positioning after positioning range and distance correction, wherein the wall body combination with the smallest signal loss estimation is used as parameter correction distance measurement information so as to obtain the precise indoor positioning coordinate through calculation. By using the indoor positioning method and system provided by the invention, the fixed and unique building structure information in indoor environment is sufficiently used; the signal obtained through measurement is subjected to fitting according to different signal attenuation of different building materials of building structures and wall bodies; the optimum wall body combination with the smallest signal loss estimation error corresponding to each position region is found; the time delay information of wireless signal spreading interference by the wall body is obtained; the distance measurement value is thus corrected; the problem of low precision of the existing positioning algorithm due to blocking between various wall bodies in the indoor environment is solved. The method has the advantages that the complexity degree is proper, and the more precise positioning result in the indoor complicated environment can be obtained.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to positioning of a wireless sensor network, and in particular to an indoor positioning method and system. Background technique [0002] With the change of modern life style, there are more and more applications of indoor positioning, especially in prisons, firefighting and hospitals. Since indoor positioning is faced with a complex propagation environment, different room structures and differences in building materials will have an impact on signal propagation, and signal transmission through walls, diffraction, and refraction will cause non-line-of-sight NLOS errors. Therefore, the general direct positioning methods are not applicable. [0003] The traditional positioning method is to first estimate the distance between the mobile station and the base station, and then realize the estimation of the position information through some algorithms based on geometric mea...

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Application Information

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IPC IPC(8): H04W4/02H04W16/20
Inventor 姚志强杨东海王淼盛孟刚
Owner XIANGTAN UNIV
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