How can tomographic image resolution be obtained using wifi sensing and imaging?

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SUMMARY

Obtaining tomographic image resolutions using WiFi sensing and imaging relies on the configuration of the antenna array. The resolution is determined by the spacing of the antennas, with the formula Resolution = 57° / λ, where λ represents the aperture in wavelengths. For effective imaging, the antenna array must consist of multiple elements spaced appropriately to capture lower spatial frequencies. Frequencies of 2.4 GHz and 5 GHz are critical, with 5 GHz providing improved resolution due to its shorter wavelength.

PREREQUISITES
  • Understanding of WiFi signal processing techniques
  • Knowledge of antenna array configurations
  • Familiarity with spatial frequency concepts in imaging
  • Basic principles of electromagnetic wave propagation
NEXT STEPS
  • Research antenna array design for WiFi imaging applications
  • Explore signal processing algorithms for enhancing image resolution
  • Study the impact of frequency selection on imaging quality
  • Learn about spatial frequency analysis in tomographic imaging
USEFUL FOR

Researchers in wireless communications, engineers specializing in imaging technologies, and professionals working on signal processing applications will benefit from this discussion.

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tomographic image resolutions from wifi sensing
hello i would like to ask how to obtain tomographic image resolutions from wifi sensing and imaging using signals processing. thanks very much.
 
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If you have one wifi transmitter and multiple receiver antennas, then the image resolution will be a function of the spacing of the furthest apart antennas. Where λ is the aperture of the antenna array in wavelengths. The angular resolution in degrees will be approximately;
Resolution = 57° / λ;
That can be applied in the horizontal and vertical dimensions.
The antenna array will need several elements, variously spaced between the end elements, to resolve the lower spatial frequencies in the image.
 
2.4 GHz is 12 cm. Seeing below that poses a fundamental challenge. 5 GHz is twice as good.
 

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