Estimating moving targets behind reinforced walls using radar

Marija M. Nikolic; Arye Nehorai; Antonije R. Djordjevic

doi:10.1109/TAP.2009.2025974

Estimating moving targets behind reinforced walls using radar

Marija M. Nikolic
, Arye Nehorai
, Antonije R. Djordjevic

Research output: Contribution to journal › Article › peer-review

25 Scopus citations

Abstract

We consider the estimation of moving targets located behind concrete walls reinforced with metallic bars, using radar measurements. The periodic structure of the rebar severely attenuates and distorts transmitted waveforms, which produces defocused images with ghost target estimates. We apply beamforming to estimate permittivity and thickness of the wall and number and position of the targets. The proposed solution is based on accurate physical models calculated using the method of moments. We show that the estimation is significantly improved by modeling the waveform distortion due to the bars. The resulting images are focused and clearly represent the contours of the targets. The algorithm is robust to the ambiguities in bar parameter values. In addition, the minimal necessary SNR is lower compared with the case in which the influence of the bars on the signal shape is ignored.

Original language	English
Article number	5109661
Pages (from-to)	3530-3538
Number of pages	9
Journal	IEEE Transactions on Antennas and Propagation
Volume	57
Issue number	11
DOIs	https://doi.org/10.1109/TAP.2009.2025974
State	Published - Nov 2009

Keywords

Beamforming
Periodic structure
Reinforced wall
Through-the-wall sensing

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10.1109/TAP.2009.2025974

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@article{98bc019ab9b74d3291d4cdbe12e3e9fd,

title = "Estimating moving targets behind reinforced walls using radar",

abstract = "We consider the estimation of moving targets located behind concrete walls reinforced with metallic bars, using radar measurements. The periodic structure of the rebar severely attenuates and distorts transmitted waveforms, which produces defocused images with ghost target estimates. We apply beamforming to estimate permittivity and thickness of the wall and number and position of the targets. The proposed solution is based on accurate physical models calculated using the method of moments. We show that the estimation is significantly improved by modeling the waveform distortion due to the bars. The resulting images are focused and clearly represent the contours of the targets. The algorithm is robust to the ambiguities in bar parameter values. In addition, the minimal necessary SNR is lower compared with the case in which the influence of the bars on the signal shape is ignored.",

keywords = "Beamforming, Periodic structure, Reinforced wall, Through-the-wall sensing",

author = "Nikolic, \{Marija M.\} and Arye Nehorai and Djordjevic, \{Antonije R.\}",

note = "Funding Information: Manuscript received July 20, 2008; revised April 30, 2009. First published June 23, 2009; current version published November 04, 2009. This work was supported in part by the Department of Defense under Air Force Office of Scientific Research MURI Grant FA9550-05-1-0443, AFOSR Grant FA9550-05-1-0018, ONR Grant N000140810849, by COST Action IC0603 (Assist), and in part by Grant TR 11021 of the Serbian Ministry of Science and Technological Development.",

year = "2009",

month = nov,

doi = "10.1109/TAP.2009.2025974",

language = "English",

volume = "57",

pages = "3530--3538",

journal = "IEEE Transactions on Antennas and Propagation",

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number = "11",

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T1 - Estimating moving targets behind reinforced walls using radar

AU - Nikolic, Marija M.

AU - Nehorai, Arye

AU - Djordjevic, Antonije R.

N1 - Funding Information: Manuscript received July 20, 2008; revised April 30, 2009. First published June 23, 2009; current version published November 04, 2009. This work was supported in part by the Department of Defense under Air Force Office of Scientific Research MURI Grant FA9550-05-1-0443, AFOSR Grant FA9550-05-1-0018, ONR Grant N000140810849, by COST Action IC0603 (Assist), and in part by Grant TR 11021 of the Serbian Ministry of Science and Technological Development.

PY - 2009/11

Y1 - 2009/11

N2 - We consider the estimation of moving targets located behind concrete walls reinforced with metallic bars, using radar measurements. The periodic structure of the rebar severely attenuates and distorts transmitted waveforms, which produces defocused images with ghost target estimates. We apply beamforming to estimate permittivity and thickness of the wall and number and position of the targets. The proposed solution is based on accurate physical models calculated using the method of moments. We show that the estimation is significantly improved by modeling the waveform distortion due to the bars. The resulting images are focused and clearly represent the contours of the targets. The algorithm is robust to the ambiguities in bar parameter values. In addition, the minimal necessary SNR is lower compared with the case in which the influence of the bars on the signal shape is ignored.

AB - We consider the estimation of moving targets located behind concrete walls reinforced with metallic bars, using radar measurements. The periodic structure of the rebar severely attenuates and distorts transmitted waveforms, which produces defocused images with ghost target estimates. We apply beamforming to estimate permittivity and thickness of the wall and number and position of the targets. The proposed solution is based on accurate physical models calculated using the method of moments. We show that the estimation is significantly improved by modeling the waveform distortion due to the bars. The resulting images are focused and clearly represent the contours of the targets. The algorithm is robust to the ambiguities in bar parameter values. In addition, the minimal necessary SNR is lower compared with the case in which the influence of the bars on the signal shape is ignored.

KW - Beamforming

KW - Periodic structure

KW - Reinforced wall

KW - Through-the-wall sensing

UR - https://www.scopus.com/pages/publications/70449492814

U2 - 10.1109/TAP.2009.2025974

DO - 10.1109/TAP.2009.2025974

M3 - Article

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SN - 0018-926X

VL - 57

SP - 3530

EP - 3538

JO - IEEE Transactions on Antennas and Propagation

JF - IEEE Transactions on Antennas and Propagation

IS - 11

M1 - 5109661

ER -

Estimating moving targets behind reinforced walls using radar

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Keywords

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