TY - JOUR
T1 - Enhanced resolution in SAR/ISAR imaging using iterative sidelobe apodization
AU - Xu, Xiaojian
AU - Narayanan, Ram M.
N1 - Funding Information:
Manuscript received January 20, 2003; revised April 26, 2004. This work was supported by the Air Force Office of Scientific Research (AFOSR) under Contract F49620-99-1-0209. The associate editor coordinating the review of this manuscript and approving it for publication was Dr. Nicolas Rougon.
PY - 2005/4
Y1 - 2005/4
N2 - Resolution enhancement techniques in radar imaging have attracted considerable interest in recent years. In this work, we develop an iterative sidelobe apodization technique and investigate its applications to synthetic aperture radar (SAR) and inverse SAR (ISAR) image processing. A modified noninteger Nyquist spatially variant apodization (SVA) formulation is proposed, which is applicable to direct iterative image sidelobe apodization without using computationally intensive upsampling interpolation. A refined iterative sidelobe apodization procedure is then developed for image-resolution enhancement. Examples using this technique demonstrate enhanced image resolution in various applications, including airborne SAR imaging, image processing for three-dimensional interferometric ISAR imaging, and foliage-penetration ultrawideband SAR image processing.
AB - Resolution enhancement techniques in radar imaging have attracted considerable interest in recent years. In this work, we develop an iterative sidelobe apodization technique and investigate its applications to synthetic aperture radar (SAR) and inverse SAR (ISAR) image processing. A modified noninteger Nyquist spatially variant apodization (SVA) formulation is proposed, which is applicable to direct iterative image sidelobe apodization without using computationally intensive upsampling interpolation. A refined iterative sidelobe apodization procedure is then developed for image-resolution enhancement. Examples using this technique demonstrate enhanced image resolution in various applications, including airborne SAR imaging, image processing for three-dimensional interferometric ISAR imaging, and foliage-penetration ultrawideband SAR image processing.
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U2 - 10.1109/TIP.2004.841198
DO - 10.1109/TIP.2004.841198
M3 - Article
C2 - 15825487
AN - SCOPUS:17444363381
SN - 1057-7149
VL - 14
SP - 537
EP - 547
JO - IEEE Transactions on Image Processing
JF - IEEE Transactions on Image Processing
IS - 4
ER -