TY - GEN
T1 - A CZT-based continuous varying PRF polar format algorithm for highly squinted spotlight SAR
AU - Qiu, Xue
AU - Li, Chunsheng
AU - Li, Jingwen
AU - Zhao, Xinxin
AU - Wang, Yan
N1 - Publisher Copyright:
© 2015 IEEE.
PY - 2015/11/10
Y1 - 2015/11/10
N2 - The polar format algorithm (PFA) is a classic algorithm for processing spotlight synthetic aperture radar (SAR) data and is extensively used in practical applications nowadays, mainly because its well performance in processing highly squinted data. Based on the chirp Z-Transform (CZT), PFA can be implemented accurately without any interpolation in the broadside case; however, for the squint mode case, since the input data are not uniformly distributed with same sampling intervals, the CZT algorithm requests interpolation in the azimuth dimension to obtain the uniform sample spacing, which leads to phase and amplitude error. To improve the processing accuracy under the squint mode, a CZT-based continuous varying PRF PFA is introduced. It achieves uniformly scaled grid along azimuth direction in wavenumber domain; as a result, interpolation in both range and azimuth dimensions can be avoided.
AB - The polar format algorithm (PFA) is a classic algorithm for processing spotlight synthetic aperture radar (SAR) data and is extensively used in practical applications nowadays, mainly because its well performance in processing highly squinted data. Based on the chirp Z-Transform (CZT), PFA can be implemented accurately without any interpolation in the broadside case; however, for the squint mode case, since the input data are not uniformly distributed with same sampling intervals, the CZT algorithm requests interpolation in the azimuth dimension to obtain the uniform sample spacing, which leads to phase and amplitude error. To improve the processing accuracy under the squint mode, a CZT-based continuous varying PRF PFA is introduced. It achieves uniformly scaled grid along azimuth direction in wavenumber domain; as a result, interpolation in both range and azimuth dimensions can be avoided.
KW - Synthetic aperture radar
KW - interpolation
KW - radar imaging
KW - signal processing algorithms
UR - https://www.scopus.com/pages/publications/84962552388
U2 - 10.1109/IGARSS.2015.7326826
DO - 10.1109/IGARSS.2015.7326826
M3 - Conference contribution
AN - SCOPUS:84962552388
T3 - International Geoscience and Remote Sensing Symposium (IGARSS)
SP - 4494
EP - 4497
BT - 2015 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2015 - Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2015 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2015
Y2 - 26 July 2015 through 31 July 2015
ER -