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Robust eigenspectrum construction method and robust wireless sensing method

A construction method and a robust technology, applied in the field of wireless sensing, can solve the problems of reduced recognition accuracy and large manpower

Pending Publication Date: 2022-06-28
DALIAN MARITIME UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method consumes a lot of manpower to collect data, and the recognition accu

Method used

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  • Robust eigenspectrum construction method and robust wireless sensing method
  • Robust eigenspectrum construction method and robust wireless sensing method
  • Robust eigenspectrum construction method and robust wireless sensing method

Examples

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Embodiment 1

[0059] This embodiment realizes gait recognition of any path based on the above method, and the main task is to construct a path-independent gait eigenspectrum based on the walking trajectory of the target. The system configuration in this embodiment is as follows:

[0060] 1. The system works on Texas Instrument AWR1443 FMCW radar transceiver equipment;

[0061] 2. The transceiver equipment works at 77GHz and the bandwidth is set to 1.75GHz, which can provide a distance resolution of 8.57cm;

[0062] 3. The transceiver equipment adopts 2-transmit and 4-receive antennas. With the help of TDM-MIMO mode, an 8-element virtual array can be formed to provide 15° AoA resolution.

[0063] For gait recognition, the present invention takes the actual walking speed of the target as the gait eigenspeed. Target walking is a large-scale activity, and the present invention uses the continuous changes of range and AoA information over time to describe the walking path of the target. After...

Embodiment 2

[0074] This embodiment implements gesture recognition at any position and direction based on the above method, and the main task is to construct a scene-independent gesture eigenspectrum based on the gesture trajectory. The system configuration in this embodiment is as follows:

[0075] 1. The system works on Texas Instrument AWR1443 FMCW radar transceiver equipment;

[0076] 2. The transceiver works at 77GHz and the bandwidth is set to 3.52GHz, which can provide a distance resolution of 4.26cm.

[0077] Since the range of the target's gesture trajectory is small, the present invention can obtain the gesture trajectory by using the range information collected by the two transceiver devices. The specific principle is as Figure 5 As shown in (a), the position of the hand must be on the circle with the transceiver device as the center and the range as the radius when making a gesture. According to the positions of the two transceiver devices, the range information of the hand...

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Abstract

The invention provides a robust eigenspectrum construction method and a robust wireless sensing method. The robust eigenspectrum construction method comprises the following steps: acquiring a sensing task, and acquiring a track of the sensing task according to an activity scale of the sensing task; acquiring displacement information capable of representing intrinsic characteristics of the perception task based on the track of the perception task; establishing a proportional relation between the intrinsic speed and the Doppler based on a relation between the intrinsic displacement information and range information relative to the sensing equipment; and on the basis of the proportional relation between the intrinsic speed and the Doppler and the Doppler spectrum, constructing an intrinsic spectrum capable of representing the intrinsic characteristics of the perception task. The technical problem that an existing Doppler spectrum can change along with the movement position and direction is solved.

Description

technical field [0001] The present invention relates to the technical field of wireless sensing, in particular, to a robust eigenspectrum construction method and a robust wireless sensing method. Background technique [0002] Robust wireless sensing is a key issue in the current wireless sensing field. Currently, in addition to device-free positioning, wireless sensing can also sense the movement, gesture, identity, etc. of the target. Typically, people utilize the Doppler spectrum for these perceptual tasks. However, the Doppler spectrum is a radial velocity spectrum. When the position and direction of the target change, the Doppler spectrum of the same sensing task will change greatly. The specific principles are as follows: figure 1 shown. When the target moves the same displacement in different directions at the same position, such as figure 1 As shown in (a), it can be found that the radial displacements are not the same. At the same time, if figure 1 As shown in ...

Claims

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Application Information

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IPC IPC(8): G06F16/36G06F3/01
CPCG06F16/367G06F3/017
Inventor 王洁邬晶淼高庆华刘晓凯
Owner DALIAN MARITIME UNIVERSITY