Hier finden Sie wissenschaftliche Publikationen aus den Fraunhofer-Instituten.

Comparison of digital beamforming algorithms for 3D terahertz imaging with sparse multistatic line arrays

: Baccouche, B.; Agostini, P.; Schneider, F.; Sauer-Greff, W.; Urbansky, R.; Friederich, F.

Volltext (PDF; )

Advances in radio science. Online journal 15 (2017), S.283-292
ISSN: 1684-9973
Zeitschriftenaufsatz, Elektronische Publikation
Fraunhofer ITWM ()

In this contribution we compare the back-projection algorithm with our recently developed modified range migration algorithm for 3-D terahertz imaging using sparse multistatic line arrays. A 2-D planar sampling scheme is generated using the array's aperture in combination with an orthogonal synthetic aperture obtained through linear movement of the object under test. A stepped frequency continuous wave signal modulation is used for range focusing. Comparisons of the focusing quality show that results using the modified range migration algorithm reflect these of the back-projection algorithm except for some degradation along the array's axis due to the operation in the array's near-field. Nevertheless the highest computational efficiency is obtained from the modified range migration algorithm, which is better than the numerically optimized version of the back-projection algorithm. Measurements have been performed by using an imaging system operating in the W frequency band to verify the theoretical results.