Experimental Moving Target Imaging in a Nonanechoic Environment With Linear Sampling Method

Doğu S., Akıncı M. N., Gose E.

IEEE GEOSCIENCE AND REMOTE SENSING LETTERS, cilt.18, sa.3, ss.441-445, 2021 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 18 Sayı: 3
  • Basım Tarihi: 2021
  • Doi Numarası: 10.1109/lgrs.2020.2976594
  • Dergi Adı: IEEE GEOSCIENCE AND REMOTE SENSING LETTERS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Aerospace Database, Aquatic Science & Fisheries Abstracts (ASFA), Communication Abstracts, Compendex, Geobase, INSPEC, Metadex, Civil Engineering Abstracts
  • Sayfa Sayıları: ss.441-445
  • İstanbul Teknik Üniversitesi Adresli: Evet

Özet

In this letter, imaging of moving targets with qualitative microwave imaging methods (Q-MWMs) is addressed. The problematic side of Q-MWM is the requirement of background measurement. To eliminate this necessity, the total electric field measured at different time instants (say E-n(tot) and E-l(tot) are the total electric fields measured at the nth and Ith time instants, respectively) is applied to Q-MWM. For these input data, the output of Q-MWM can be assumed to be the summation of the indicators at these time instants (i.e., F E-n(tot)- E-l(tot) produces the differential indicator I-nl = I-n + I-l, where I-n and I-l are the indicators at the nth and lth time instants, respectively). Using this information for all possible time pairs, an equation system is set for indicator values at different time instants. Solving this equation system, the indicator of Q-MWM for each measurement time is obtained, without taking any background measurement. The performance of the proposed algorithm is verified for the linear sampling method (LSM), which is an example of Q-MWM, with the 3-D and 2-D [both transverse magnetic (TM) and transverse electric (TE)] experimental measurements performed in a nonanechoic environment.