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RSSI indoor multipath scattering positioning method based on optimization algorithm

A technology for optimizing algorithms and positioning methods, applied in positioning, measuring devices, instruments, etc., can solve problems such as inability to use and errors, and achieve the effects of improving measurement accuracy, reducing positioning deviation, and improving positioning accuracy

Active Publication Date: 2017-06-13
山东博蓝建筑工程有限公司
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Problems solved by technology

In general, there is an error between the measured power and the true value (usually caused by the occluder, also known as the shadowing factor), which makes the method of simply converting the measured power into the electromagnetic wave propagation path through the model difficult. Introduces a large error and cannot be used

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  • RSSI indoor multipath scattering positioning method based on optimization algorithm
  • RSSI indoor multipath scattering positioning method based on optimization algorithm
  • RSSI indoor multipath scattering positioning method based on optimization algorithm

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Embodiment Construction

[0018] Exemplary embodiments of the present invention will be described below with reference to the accompanying drawings. In the interest of clarity and conciseness, not all features of an actual implementation are described in this specification. It should be understood, however, that in developing any such practical embodiment, many implementation-specific decisions must be made in order to achieve the developer's specific goals, such as meeting those constraints related to the system and business, and those Restrictions may vary from implementation to implementation. Moreover, it should also be understood that development work, while potentially complex and time-consuming, would at least be a routine undertaking for those skilled in the art having the benefit of this disclosure.

[0019] Here, it should also be noted that, in order to avoid obscuring the present invention due to unnecessary details, only the device structure and / or processing steps closely related to the ...

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Abstract

The invention provides an RSSI indoor multipath scattering positioning method based on an optimization algorithm. The method includes the steps that the positions of three or more anchor nodes are determined; aiming at each anchor node, an RSSI request instruction is transmitted to the anchor node from an unknown node multiple times, multiple received signal intensity values from the anchor node are measured on the unknown node, an underdetermined system of equations of the anchor node is obtained according to an RSSI method, unknown quantities in the underdetermined system of equations comprise the to-be-measured distance between the anchor node and the unknown node and m path loss coefficients, and the underdetermined system of equations corresponding to the anchor node is solved through the optimization algorithm to obtain the to-be-measured distance between the anchor node and the unknown node; coordinates of the unknown node are calculated according to the to-be-measured distances between the three or more anchor nodes and the unknown node and coordinates of the three or more anchor nodes.

Description

technical field [0001] The invention relates to indoor positioning technology, in particular to an RSSI indoor multipath scattering positioning method based on an optimization algorithm. Background technique [0002] In the complex indoor propagation environment, the indirect propagation of signals caused by multipath, scattering, reflection, etc. is the main feature of indoor channels. A large number of studies have shown that in complex indoor propagation environments, the positioning performance of typical parametric positioning algorithms such as TOA, TDOA, AOA, and RSSI is often not ideal, because the estimation of the above parameters is difficult in the case of severe multipath scattering. Large errors often exist, and these errors affect the positioning performance of the above positioning methods in indoor positioning to a certain extent. [0003] The positioning algorithm based on RSSI (Received Signal Strength Indication, received signal strength indication, refe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S5/02G01S5/10
Inventor 邢键尹馨梁家锋
Owner 山东博蓝建筑工程有限公司
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