An efficient FPGA‐based implementation of UWB radar system for through‐wall imaging

Saad, Mohamed; Maali, Abdelmadjid; Azzaz, Mohamed Salah; Benssalah, Mustapha

doi:10.1002/dac.5510

“…Non-destructive imaging of objects situated behind optically opaque walls can be achieved by means of penetrating radio waves [1,2] in the form of Ground Penetrating Radars (GPR). Like all radars, GPRs generate radio waves and analyze the echoes resulted from the reflections of these waves at discontinuities in the tested medium [3].…”

Section: Introductionmentioning

confidence: 99%

Through-Wall Imaging Using Low-Cost FMCW Radar Sensors

Paun

2024

Preprint

0

View full text Add to dashboard Cite

Many fields of human activity benefit from the ability to create images of obscured objects placed behind walls and to map their displacement in a noninvasive way. Usually, imaging devices like Synthetic Aperture Radars (SAR) and Ground Penetrating Radars (GPR) use expensive dedicated electronics which results in prohibitive prices. This paper presents the experimental implementation and the results obtained from an imaging system capable of performing SAR imaging and interferometric displacement mapping of targets located behind walls, as well as 3D GPR imaging using a low-cost general-purpose radar sensor. The proposed solution uses for the RF section of the system a K-band microwave radar sensor module implementing Frequency Modulated Continuous Wave operation. The low-cost sensor was originally intended for simple presence detection and ranging for domestic applications. The proposed system was tested in several scenarios and proved to operate as intended for a fraction of the cost of a commercial imaging device.

show abstract

“…Non-destructive imaging of objects situated behind optically opaque walls can be achieved by means of penetrating radio waves [1,2] in the form of Ground-Penetrating Radars (GPRs). Like all radars, GPRs generate radio waves and analyze the echoes resulted from the reflections of these waves at discontinuities in the tested medium [3].…”

Section: Introductionmentioning

confidence: 99%

Through-Wall Imaging Using Low-Cost Frequency-Modulated Continuous Wave Radar Sensors

Paun

2024

Remote Sensing

3

0

View full text Add to dashboard Cite

Many fields of human activity benefit from the ability to create images of obscured objects placed behind walls and to map their displacement in a noninvasive way. Usually, imaging devices like Synthetic Aperture Radars (SARs) and Ground-Penetrating Radars (GPRs) use expensive dedicated electronics which results in prohibitive prices. This paper presents the experimental implementation and the results obtained from an imaging system capable of performing SAR imaging and interferometric displacement mapping of targets located behind walls, as well as 3D GPR imaging using a low-cost general-purpose radar sensor. The proposed solution uses for the RF section of the system a K-band microwave radar sensor module implementing Frequency-Modulated Continuous Wave (FMCW) operation. The low-cost sensor was originally intended for simple presence detection and ranging for domestic applications. The proposed system was tested in several scenarios and proved to operate as intended for a fraction of the cost of a commercial imaging device. In one scenario, it was able to detect and locate a 15 cm-diameter fire-extinguisher located at a distance of 3.5 m from the scanning system and 1.6 m behind a 3 cm-thick MDF (medium-density fiberboard) wall with cm-level accuracy. In a second test, the proposed system was used to perform interferometric displacement measurements, and it was capable of determining the displacement of a metal case with sub-millimeter accuracy. In a third experiment, the system was used to construct a 3D image of the inside of a wood table with cm-level resolution.

show abstract

Ultra‐wideband imaging with an improved backward projection algorithm for far‐field applications

Xu,

Fan,

Li

et al. 2024

Micro & Optical Tech Letters

View full text Add to dashboard Cite

Ultra‐wideband (UWB) radar imaging is widely used in penetration detection, target location and detection, and vital monitoring because of its high interference immunity and excellent target recognition with high resolution. In this paper, we report the design of a UWB stepper radar imaging system by using a vector network analyzer and a specially designed novel Vivaldi antenna for far‐field imaging applications. An anti‐attenuation backward projection (AA‐BP) algorithm is proposed to alleviate the attenuation impact of electromagnetic wave propagation. The AA‐BP algorithm and the specially designed Vivaldi antenna are jointly applied in our experiments on multiple targets through wall imaging in both free space and multiple‐path propagation environments. The experimental results show that our reported imaging system achieves desirable performances of far‐field imaging.

show abstract

An efficient FPGA‐based implementation of UWB radar system for through‐wall imaging

Cited by 5 publications

References 30 publications

Through-Wall Imaging Using Low-Cost FMCW Radar Sensors

Through-Wall Imaging Using Low-Cost FMCW Radar Sensors

Through-Wall Imaging Using Low-Cost Frequency-Modulated Continuous Wave Radar Sensors

Ultra‐wideband imaging with an improved backward projection algorithm for far‐field applications

Contact Info

Product

Resources

About