DocumentCode :
2143908
Title :
Two-step (estimate and detect) sparse imaging
Author :
Nikolic, Marija ; Djordjevic, Antonije ; Nehorai, Arye
Author_Institution :
Sch. of Electr. Eng., Univ. of Belgrade, Belgrade, Serbia
fYear :
2012
fDate :
8-14 July 2012
Firstpage :
1
Lastpage :
2
Abstract :
We propose a two-step algorithm, for electromagnetic imaging of perfect electric conducting (PEC) targets hidden inside known medium, that uses l1 regularization. The basic assumption is that the target can be approximated by a few equivalent sources (filament currents). In the first step, for each incidence, we estimate the locations of the equivalent sources corresponding to the target scattering centers. However, false solutions may appear due to the multiple scattering or insufficient measurements. We eliminate the false solutions in the second step; we decide for each of the estimated equivalent sources weather it belongs to the target.
Keywords :
conducting bodies; electromagnetic wave scattering; microwave imaging; PEC targets; electromagnetic imaging; equivalent sources; estimate and detect sparse imaging algorithm; filament currents; l1 regularization; multiple scattering; perfect electric conducting; target scattering centers; two-step sparse imaging algorithm; Approximation algorithms; Current; Dielectrics; Electromagnetics; Imaging; Sensors; Vectors;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Antennas and Propagation Society International Symposium (APSURSI), 2012 IEEE
Conference_Location :
Chicago, IL
ISSN :
1522-3965
Print_ISBN :
978-1-4673-0461-0
Type :
conf
DOI :
10.1109/APS.2012.6348674
Filename :
6348674
Link To Document :
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