Non-contact perceptive positioning method

A positioning method and non-contact technology, applied in the field of perception and positioning, can solve the problem of inability to realize commercial WiFi equipment

Active Publication Date: 2016-12-14
PEKING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method needs to modify the existing WiFi equipment, change the trad

Method used

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Embodiment Construction

[0040] Below in conjunction with accompanying drawing, further describe the present invention through embodiment, but do not limit the scope of the present invention in any way.

[0041] The present invention provides a non-contact sensing positioning method. The positioning target does not need to carry any equipment, and does not need to modify any parts of the WiFi network card. Only commercial WiFi network cards can be used to realize accurate non-contact sensing dynamic object positioning.

[0042] figure 1 It is a Wi-Fi antenna array transceiver system built in the embodiment of the present invention; wherein, (a) is a transmitting end (Wi-Fi equipment); (b) is a receiving end (a Wi-Fi network card provided with a uniform linear antenna array, The Wi-Fi network card supports three antenna ports, which are connected to three antennas respectively, and the distance between the antennas does not exceed half a wavelength). The implementation of the present invention include...

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PUM

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Abstract

The invention discloses a non-contact perceptive positioning method. A transmitting end is WiFi signal transmitting equipment; a receiving end is a WiFi signal receiver corresponding to the transmitting end; an antenna array is constructed to receive signals; based on the difference between antennas, and by utilization of signal coherence, the arrival angle of a reflected signal of a moving target is identified; simultaneously, the relative lengths of various reflection paths of the dynamic target are estimated by utilizing the difference between carriers having different frequencies; and the arrival angle of a signal of one of the reflection paths is selected and used as the angle of the positioning target relative to receiving equipment. According to the non-contact perceptive positioning method disclosed by the invention, the positioning target does not need to carry any equipment; accurate non-contact perceptive positioning of a dynamic object can be realized by utilizing a WiFi network card; the position of the target can be determined by only needing one WiFi transmitting end and two WiFi receiving ends at least; the missing measurement value is complemented by utilizing the spatial and time continuities of movement simultaneously; and thus, the perceptible range is enlarged.

Description

technical field [0001] The invention relates to perceptual positioning technology, in particular to a non-contact perceptual positioning method based on commercial wireless local area network equipment. Background technique [0002] Non-contact sensing positioning means that the location of the target can be determined without the need for the target to carry any equipment or any contact behavior. Wireless Local Area Network (WiFi) devices are widely present in our daily life, so the non-contact sensing positioning technology implemented on commercial WiFi devices has attracted widespread attention. [0003] In 2013, Heba Abdel-Nasser of Egypt proposed a solution (MonoPHY: Mono-Stream-based Device-free WLAN Localization via Physical Layer Information, WCNC 13, P4546-4551). In the same year, Xiao Jiang and others in Hong Kong also proposed a similar Idea (Pilot: Passive Device-freeIndoor Localization Using Channel State Information, ICDCS 13): Use the channel state informati...

Claims

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Application Information

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IPC IPC(8): H04W64/00H04B7/04G01S5/10
CPCG01S5/10H04B7/0413H04W64/006
Inventor 张大庆李翔李晟洁王亚沙
Owner PEKING UNIV
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