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Positioning method based on building layout constraint under complex indoor environment

An indoor environment and positioning method technology, which is applied in the positioning field in complex indoor environments, can solve problems such as influence weights, and achieve the effect of simple environment deployment and low computational complexity

Active Publication Date: 2015-09-23
SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
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Problems solved by technology

However, this method relies on the estimated distance between the unknown location and each reference node, and the error introduced by the estimated distance will affect the determination of the weight
In addition, this method has certain requirements on the layout of reference nodes, and there is a blind spot in the positioning area

Method used

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  • Positioning method based on building layout constraint under complex indoor environment
  • Positioning method based on building layout constraint under complex indoor environment
  • Positioning method based on building layout constraint under complex indoor environment

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[0022] Below in conjunction with specific embodiment, further illustrate the present invention. It should be understood that these examples are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the teachings of the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of the present application.

[0023] Embodiments of the present invention relate to a positioning method in a complex indoor environment based on architectural pattern constraints, such as figure 1 As shown, it includes the following steps: (1) Evaluation of the environmental noise distribution: collect the signal strength between two reference nodes, estimate the signal strength when there is no noise according to the path loss model, and calculate the dif...

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Abstract

The invention relates to a complex indoor environment positioning method based on building layout constraint; the method comprises the following steps: evaluating ambient noise distribution; calculating an initial position of a mobile object; evaluating position in a real time positioning process. Proposed prior distribution aims to different zones of the object, and distribution function of a candidate position can be corrected, thus resisting influences by time varying strong noises against an evaluation result; in maximum posterior probability solving, a multi-hypothesis maximum likelihood estimation method is employed, so the proposed positioning method has robustness against time varying noises and stadia / non-stadia mixed complex conditions. The complex indoor environment positioning method is simple in environment disposition, can obtain channel prior knowledge through data acquisition between reference nodes, thus realizing real time positioning process; the method is low in calculation complexity, and suitable for low-power equipment and system realization.

Description

technical field [0001] The invention relates to the technical field of application of the Internet of Things, in particular to a positioning method in a complex indoor environment based on architectural pattern constraints. Background technique [0002] Indoor positioning applications are one of the core contents of the Internet of Things (IoT), and its related academic research and commercial applications have been widely carried out for decades. These location-based services (Location Based Service, LBS) mainly include emergency rescue, social networking, smart home and shopping mall advertising push services. Especially in 5G communication standards, location services play an important role and influence in massive connections. [0003] At present, typical indoor target positioning systems are generally divided into active and passive. The passive positioning system mainly uses cameras and radars to complete the acquisition of the target position without the need for th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W4/04H04W64/00
CPCH04W4/04H04W64/00Y02D30/70
Inventor 才正国杨旭光何为张质懿
Owner SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
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