Automated swept-angle bistatic scattering measurements using continuous wave radar

Cote, Marc G.

doi:10.1109/19.137345

Cited by 36 publications

(15 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…If lml/ < tl and lm21 < tl , then the function m is fixed equal to zero in the rectangle Rsl,s, . 4. If c is odd, then increase the tolerance t, by Atl .…”

Section: The Numerical Methodsmentioning

confidence: 99%

See 1 more Smart Citation

A numerical method to solve the inverse medium problem: an application to the Ipswich data

Maponi

Misici²,

Zirilli³

1997

IEEE Antennas Propag. Mag.

View full text Add to dashboard Cite

obtained at the same degree of convergence without any regularization, with a Tikhonov (TK) regularization, and with our EP regularization scheme. The reconstruction without regularization shows a blurred profile, with a coarse shape description. The use of a TK regularization smoothes the profile, and the edges are not preserved. The new regularization scheme improves the perfonnance of the CG algorithm: the edges are clearly preserved, while the homogeneous areas are smoothed.We proposed, then, two other results, obtained from two mystery objects, named IPS005 and IPS007. The scattered fields were collected from 36 viewing angles, 9, ~[0",350"], with a sample spacing of lo", over the observation sector 8, SOs <8,+170",withasamplespacingof AOs =lo". Theonly one piece of information given with these data sets was the radius of the minimum circumscribing circle. We show, in Figure 2 and Figure 3, the results obtained by using the CG algorithm, without any regularization (no a priori information used), and also the corresponding original profiles revealed at the 1996 Symposium. The domain, L, is discretized into 29 x 29 square cells of 1 mm', for target IPS005, and of 0.5 mm2, for target IPS007. The main problem was to find a satisfying calibration factor for each mystery target. After several blind tests, we were able to propose two suitable reconstructions, using valid but non-optimum calibration parameters. These reconstructions gave quite good spatial resolution of the t w~ mystery objects. ConclusionThis paper presents some evidence of the effectiveness of adding the EP regularization to the CG method, in reconstructing the shape and permittivity profile of dielectric objects. Without any a priori information, our CG algorithm is also still efficient, and succeeded in reconstructing two mystery targets. As the two targets are now known, we hope we can greatly enhance the reconstruction quality by choosing better values for the calibration factors, and by applying our EP regularization to these data. References1. P. Lobel, R. Kleinman, Ch. Pichot, L.

show abstract

“…If lml/ < tl and lm21 < tl , then the function m is fixed equal to zero in the rectangle Rsl,s, . 4. If c is odd, then increase the tolerance t, by Atl .…”

Section: The Numerical Methodsmentioning

confidence: 99%

“…curZff(x)+ikn,(x)E(x)=O , x E R~, (4) where k = 2nf & is the wave number, curZ is the curl operator, div is the divergence operator, 0 is the zero vector in C3, and is the refractive index of the medium. We note that Ren& 2 1, Im n,(x) 2 0, x E R 3 .…”

Section: ~(~ T ) =~L T ( X ) E X P ( -Z 2 N F T ) mentioning

confidence: 99%

A numerical method to solve the inverse medium problem: an application to the Ipswich data

Maponi

Misici²,

Zirilli³

1997

IEEE Antennas Propag. Mag.

View full text Add to dashboard Cite

show abstract

“…Misalignment of these two centers of rotation may introduce phase errors in the scattered field, and prevent one from combining multiple-view data. Although a certain degree of misalignment is unavoidable in the present system [3], we believe the measured phase to be credible, and the phase error due to misalignment to be small.…”

mentioning

confidence: 57%

Imaging of Unknown Targets From Measured Scattering Data

Pommet

Morris²,

McGahan³

et al. 1996

IEEE Antennas Propag. Mag.

View full text Add to dashboard Cite

Figure 2. The reconstruction of a PEC strip. The approximate width, measured from the image, is between 11.5 cm and 12.0 cm. (The exact size of the strip is not known). The image region is a square that consists of SO x SO cells.method. This method has the advantage of reconstructing arbitrarily shaped PEC objects without a priori knowledge of the objects. It also has the potential to reconstruct large objects, because its computational complexity can be reduced to O (N" IogN) References

show abstract

“…The RCS of the actual target under investigation is then derived by comparison with the calibration target response [6]. The most commonly adopted calibration targets are metallic spheres [7], thanks to the simple alignment procedure they allow and to the availability of analytical closed-form solutions for the scattered field [8].…”

Section: B Calibration Targetmentioning

confidence: 99%

Radar cross section measurements of the human body for UWB radar applications

Piuzzi

Pisa

D'Atanasio

et al. 2012

2012 IEEE International Instrumentation and Measurement Technology Conference Proceedings

View full text Add to dashboard Cite

An experimental set-up for mono-static radar cross section measurements in the 1 -10 GHz frequency band, employing an anechoic chamber, is presented and validated. The test range is calibrated by means of a readily available aluminum flat panel and its performance is tested against canonical metallic and lossy dielectric targets. The set-up is then employed to carry out investigations on the radar cross section of the human body. Initial findings show a complex resonating pattern, highly influenced by even slight subject movements, with a distinct spectral signature for each subject. The final aim is the achievement of realistic scattering data of human subjects for the purpose of designing a ultra wideband (UWB) radar system for breath activity monitoring.

show abstract

Automated swept-angle bistatic scattering measurements using continuous wave radar

Cited by 36 publications

References 5 publications

A numerical method to solve the inverse medium problem: an application to the Ipswich data

A numerical method to solve the inverse medium problem: an application to the Ipswich data

Imaging of Unknown Targets From Measured Scattering Data

Radar cross section measurements of the human body for UWB radar applications

Contact Info

Product

Resources

About