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A device-free target location method based on geometry

A device-free target and positioning method technology, which is applied in the field of using wireless communication technology to achieve device-free target positioning, can solve problems such as the inapplicability of the DFL method, and achieve the effect of reducing the amount of calculation and storage, simplifying the algorithm and improving the positioning performance.

Active Publication Date: 2019-05-28
NANJING NORMAL UNIVERSITY
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  • Abstract
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Problems solved by technology

For some resource-constrained wireless networks, the model-based DFL method is often not applicable

Method used

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  • A device-free target location method based on geometry
  • A device-free target location method based on geometry
  • A device-free target location method based on geometry

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Embodiment Construction

[0043] In order to better understand the technical solution of the present invention, the working process and beneficial effects of the present invention will be described in detail below in conjunction with the drawings and specific embodiments.

[0044] A kind of device-free target location method based on geometric mode of the present invention, comprises the following steps:

[0045] 1) Establishment of the positioning system: the positioning system includes M+1 wireless transceiver nodes, which are networked based on the IEEE802.15.4 wireless communication protocol. Each wireless transceiver node has 16 communication channels, starting from 2405MHz and ending at 2085MHz , a channel every 5MHz. Among them, M wireless transceiver nodes form a measurement network, and the M+1th node is a control node, which is responsible for collecting data and controlling channel switching.

[0046] 2) Channel selection and received signal strength measurement:

[0047] Considering that ...

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Abstract

The invention discloses a device-free target localization method based on a geometric mode, comprising the following steps: using a plurality of wireless communication nodes with multi-channel communication ability to constitute a measurement network, and measuring the received signal strength value at each of the multiple channels; in a positioning stage, taking links formed between the wireless communication nodes as straight line segments, determining effective areas and effective links affected by a target based on priori information, taking the intersections of the effective links in the effective areas as possible target positions, and performing weighted averaging on the possible positions to get a single channel localization result; and finally, performing weighted fusion on the localization results of the multiple channels to get a final target position. The device-free target localization method needs no shadow model, only simple geometric operation and twofold weighted operation are needed, and computation resources and storage resources are rarely needed. The accuracy and robustness of device-free target localization can be improved effectively.

Description

technical field [0001] The invention belongs to the technical field of wireless positioning, and in particular relates to a method for realizing target positioning without equipment by using wireless communication technology. Background technique [0002] At present, positioning-based services have covered many fields such as smart cities, search and rescue, intelligent transportation, navigation and aviation, logistics management, geodetic surveying, marine surveying and mapping, meteorological surveying, disaster prevention, medical services, etc., and positioning and navigation technology has become a guarantee One of the necessary means of national security and military operations. [0003] Among the many wireless positioning systems, the most famous is the positioning system that sets radio transmission sources on various orbiting satellites, such as the Global Positioning System (GPS) in the United States, the Galileo system in Europe, the GLONASS system in Russia, and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W4/02G01S5/02
CPCG01S5/0278G01S5/0284H04W4/02
Inventor 柯炜陆俊金杰袁亚男
Owner NANJING NORMAL UNIVERSITY
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