Low complexity portable MIMO radar system for the characterisation of complex environments at high resolution

Harkati, Lekhmissi; Abdo, Ray; Avrillon, Stéphane; Ferro-Famil, Laurent

doi:10.1049/iet-rsn.2019.0576

Cited by 10 publications

(7 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…An experiment was carried out using hardware and software facilities developed for 3D Ground-Based SAR campaigns dedicated to the refined characterization of volumetric environments [ 41 , 42 , 43 , 44 ]. The geometrical configuration was similar to the one used to simulate signals, but with a reference antenna

located at a height of

m above the ground, and at ground range distance of

m from the center of the scene.…”

Section: Resultsmentioning

confidence: 99%

Low-Complexity 3D InISAR Imaging Using a Compressive Hardware Device and a Single Receiver

Davy

Ferro-Famil

2022

Sensors

View full text Add to dashboard Cite

An Interferometric Inverse SAR system is able to perform 3D imaging of non-cooperative targets by measuring their responses over time and through several receiving antennas. Phase differences between signals acquired with a spatial diversity in vertical or horizontal directions are used to localize moving scatterers in 3D. The use of several receiving channels generally results into a costly and complex hardware solution, and this paper proposes performing this multichannel acquisition using a single receiver and a hardware compressive device, based on a chaotic cavity which simultaneously multiplexes in the spectral domain signals acquired over different antennas. The radar responses of the scene are encoded in the spectral domain onto the single output of a leaky chaotic cavity, and can be retrieved by solving an inverse problem involving the random transfer matrix of the cavity. The applicability of this compressed sensing approach for the 3D imaging of a non-cooperative target using low-complexity hardware is demonstrated using both simulations and measurements. This study opens up new perspectives to reduce the hardware complexity of high-resolution ISAR systems.

show abstract

located at a height of

m above the ground, and at ground range distance of

m from the center of the scene.…”

Section: Resultsmentioning

confidence: 99%

Low-Complexity 3D InISAR Imaging Using a Compressive Hardware Device and a Single Receiver

Davy

Ferro-Famil

2022

Sensors

View full text Add to dashboard Cite

show abstract

“…As explained in [21,26], by combining the transmitting and receiving channels together with an adequate physical antenna spacing and platform motion in the vertical direction, it is possible to generate a quasi-uniform equivalent array of antennas in elevation, with an effective inter-element spacing in elevation denoted by dz in Table 2. The values of the equivalent spacings dz B and dz F differ in the BSC mode, as all three antennas on the same side are used as transmitters and receivers.…”

Section: Experiments Configuration For Roadway Characterization 31 Gr...mentioning

confidence: 99%

“…TomoSAR has been used to investigate the characteristics and scattering mechanisms of complex 3-D media such as snow [16], ice [17,18], and forests [19]. Practical studies used near-range TomoSAR imaging to explore detailed structural properties by employing ground-based SAR (GB-SAR) systems [16,17,20,21].…”

Section: Introductionmentioning

confidence: 99%

Comparison of Imaging Radar Configurations for Roadway Inspection and Characterization

Wu,

Ferro-Famil,

Boutet

et al. 2023

Sensors

View full text Add to dashboard Cite

This paper investigates the performance of a wide variety of radar imaging modes, such as nadir-looking B-scan, or side-looking synthetic aperture radar tomographic acquisitions, performed in both back- and forward-scattering geometries, for the inspection and characterization of roadways. Nadir-looking B-scan corresponds to a low-complexity mode exploiting the direct return from the response, whereas side-looking configurations allow the utilization of angular and polarimetric diversity in order to analyze advanced features. The main objective of this paper is to evaluate the ability of each configuration, independently of aspects related to operational implementation, to discriminate and localize shallow underground defects in the wearing course of roadways, and to estimate key geophysical parameters, such as roughness and dielectric permittivity. Campaign measurements are conducted using short-range radar stepped-frequency continuous-waveform (SFCW) devices operated in the C and X bands, at the pavement fatigue carousel of Université Gustave Eiffel, over debonded areas with artificial defects. The results indicate the great potential of the newly proposed forward-scattering tomographic configuration for detecting slight defects and characterizing roadways. Case studies, performed in the presence of narrow horizontal heterogeneities which cannot be detected using classical B-scan, show that both the coherent integration along an aperture using the back-projection algorithm, and the exploitation of scattering mechanisms specific to the forward-looking bistatic geometry, allows anomalous echoes to be detected and further characterized, confirming the efficacy of radar imaging techniques in such applications.

show abstract

“…Recently, multi-input multi-output (MIMO) radar has attracted much attention as an alternative to the mechanical GB-SAR [10][11][12][13][14][15][16][17]. The development of new MIMO antenna configurations for radar systems to monitor large areas is demanded.…”

Section: Introductionmentioning

confidence: 99%

“…In [13] a MIMO radar was constructed with 4 × 4 horn antennas operating at the X-band. A 6 × 6 folded dipole MIMO antenna working at the C-band was used to configure a MIMO radar to synthesize an equally spaced virtual array of 36 elements [16]. A 2 × 6 planar MIMO antenna with coaxial cavity horn elements was used to construct a MIMO radar system with great area coverage [17].…”

Section: Introductionmentioning

confidence: 99%

Antenna Array for Ku-Band MIMO GB-SAR

El-Hameed

Suzuki

2021

IEEE Access

View full text Add to dashboard Cite

A new multi-input multi-output (MIMO) antenna configuration with wideband and low sidelobe level (SLL) is introduced for ground-based synthetic aperture radar (GB-SAR). The proposed MIMO antenna has 15 transmitting and 16 receiving antenna arrays, arranged in two parallel straight lines, to synthesize a virtual array of 256 elements suitable for monitoring relatively large areas. The inter-element spaces are optimized to λ between transmitting elements and 4λ between receiving elements, to realize both low mutual coupling and an inferior SLL of lower than-37 dB for the overall MIMO antenna. The MIMO antenna element has eight rectangular patch linear arrays working at 17.1 GHz. A traveling wave-feeding network with center excitation is used to feed each element, in order to reduce the SLL and achieve a wide bandwidth of more than 300 MHz. The antenna array shows a gain of 14.3 dBi and half-power beamwidths (HPBWs) of 10° and 105° in the elevation and azimuth planes, respectively. The performance of the proposed design satisfies the GB-SAR requirements, which are validated by fabrication and measurement.

show abstract

Low complexity portable MIMO radar system for the characterisation of complex environments at high resolution

Cited by 10 publications

References 33 publications

Low-Complexity 3D InISAR Imaging Using a Compressive Hardware Device and a Single Receiver

Low-Complexity 3D InISAR Imaging Using a Compressive Hardware Device and a Single Receiver

Comparison of Imaging Radar Configurations for Roadway Inspection and Characterization

Antenna Array for Ku-Band MIMO GB-SAR

Contact Info

Product

Resources

About