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Robust passive passiveness target positioning method based on multiple frequency points

A target positioning and multi-frequency point technology, applied in positioning, radio wave measurement systems, instruments, etc., can solve problems such as large positioning errors, link false alarms, and difficulty in accurately detecting whether the link is blocked by the target, and achieve detection Improved performance and positioning accuracy, the effect of good performance

Active Publication Date: 2015-12-02
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

Therefore, the RSS change caused by target occlusion at a single frequency point is unpredictable, and it is difficult to accurately detect whether the link is blocked by the target only based on the change of the RSS value at the single frequency point, which makes the link detection have a large false alarm and Missed detection, and cause a large positioning error
In addition, the existing passive target positioning based on multiple frequency points (the operating frequency of the radio frequency node is multiple frequency values) is to select the RSS measurement value on one of the frequency points according to the attenuation of RSS at different frequency points for target positioning , and the existing passive target positioning methods are not robust to interfering links, so that there are a lot of false alarms in link detection, making the positioning accuracy poor

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  • Robust passive passiveness target positioning method based on multiple frequency points
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  • Robust passive passiveness target positioning method based on multiple frequency points

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[0069] The present invention will be described in detail below with reference to the drawings and embodiments, and the technical problems and beneficial effects solved by the technical solution of the present invention will also be described. The flow chart of the robust passive passive target positioning method based on multi-frequency points proposed by the present invention is as follows figure 2 As shown, it specifically includes the following implementation steps:

[0070] Step 1: Use the RSS variation of the link at multiple frequency points to detect the attenuation link set L D ;

[0071] Step 1.1: Configure the node:

[0072] The monitoring area is a 2-dimensional xoy plane, and o is the coordinate origin; K wireless nodes working in the same frequency band and supporting the same communication protocol are deployed around the monitoring area and K≥4, all nodes are located on the same xoy coordinate plane, and Each node is assigned a unique ID number as an identif...

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Abstract

The invention discloses a robust passive passiveness target positioning method based on multiple frequency points, and belongs to the technical field of target detection and positioning in a wireless network. The method detects an attenuation link through measurement of a variable quantity of an RSS value of a link on the multiple frequency points, deletes an interference link through coarse positioning of a target to obtain a shadow attenuation link set, and then performs accurate positioning on the target by utilizing a weighted least square method. Compared with attenuation link detection under a single frequency point, attenuation link detection adopted in the method based on the multiple frequency points has better performance in indoor multi-path environment, can improve detection performance and positioning precision of the target in a monitoring region, and can reduce the false alarm probability of a system.

Description

technical field [0001] The invention relates to a wireless tomography system positioning method, which is a wireless tomography system positioning method based on multi-frequency point attenuation link detection and robust passive passive target positioning, and belongs to the target detection and positioning technology in wireless networks field. Background technique [0002] Passive target positioning is an emerging target positioning technology, which can locate targets that do not carry any electronic tags in the monitoring area, so it can be widely used in home security, disaster rescue, military target detection and other fields. Most of the current passive target location methods use video cameras, infrared, acoustic sensors, or radar, but these methods have major drawbacks such as not being able to penetrate walls, not working in dark and smoky environments, and being very expensive. Passive object localization methods based on received signal strength (RSS) have at...

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Application Information

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IPC IPC(8): G01S5/02
CPCG01S5/02
Inventor 刘珩许胜新倪亚萍王正欢安建平卜祥元辛怡
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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