Through-the-Wall Imaging Exploiting 2.4GHz Commodity Wi-Fi
Wei Zhong, Kai He, Lianlin Li

TL;DR
This paper demonstrates a low-cost method for through-the-wall imaging using commodity Wi-Fi signals and holographic imaging techniques, employing a synthetic aperture and FBP algorithm for image reconstruction.
Contribution
It introduces a novel approach to indoor through-the-wall imaging utilizing standard Wi-Fi signals and a holographic imaging framework with experimental validation.
Findings
Successful imaging through walls using Wi-Fi signals
Effective use of synthetic aperture and FBP algorithm
Demonstrated feasibility with commodity Wi-Fi devices
Abstract
In this letter, we experimentally investigate a low-cost through-the-wall imaging exploiting Wi-Fi signals in an indoor environment from the perspective of holographic imaging. In our experiments, a pair of antennas in a synthetic aperture mode is used to acquire signals produced by commodity Wi-Fi devices and reflected from the scene in a synthetic aperture mode. The classical filtered back propagation (FBP) algorithm is then employed to form the image based on these signals. We use an IEEE 802.11n wireless router working at 2.4GHz with bandwidth of 20MHz. Selected experimental results are provided to demonstrate the performance of the proposed Wi-Fi based imaging scheme.
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Taxonomy
TopicsIndoor and Outdoor Localization Technologies · Microwave Imaging and Scattering Analysis · Antenna Design and Analysis
