Premium
FDTD‐based two‐dimensional frequency‐dependent numerical imaging for radar scattering
Author(s) -
Fang Dagang,
Jin Dongxing
Publication year - 1996
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/(sici)1098-2760(19960805)12:5<265::aid-mop6>3.0.co;2-8
Subject(s) - narrowband , scattering , finite difference time domain method , initialization , amplitude , radar , radar imaging , optics , wideband , acoustics , algorithm , physics , computer science , mathematics , computational physics , telecommunications , programming language
This Letter presents FDTD‐based two‐dimensional numerical frequency‐dependent imaging for radar scattering. Instead of measurement, the images are reconstructed from the near scattering field with the use of the FDTD method. The maximum‐likelihood (ML) algorithm is used to yield high‐resolution imaging for wideband data. To obtain the initial estimates of ML algorithm, matrix enhancement and the TLS‐ESPRIT technique are repeatedly employed to provide the positions and amplitudes of scattering centers for each segment narrowband data. The initialization of the discrete geometry parameters is obtained by an approximation based on the amplitude variations at different frequency segments. Computer simulation shows the validity of this technique. © 1996 John Wiley & Sons, Inc.