Title :
Cross-Range SAR Reconstruction With Multicarrier OFDM Signals
Author :
Garmatyuk, Dmitriy
Author_Institution :
Dept. of Electr. & Comput. Eng., Miami Univ., Oxford, OH, USA
Abstract :
In this letter, we describe the performance of an efficient method of slow-time synthetic aperture radar (SAR) signal processing based on reconstruction via matched filtering of estimated phase history of ultra-wideband (UWB) orthogonal frequency division multiplexing (OFDM) radar signals. The method can be used in conjunction with fast-time matched filtering to form full 2-D SAR images. The novelty of the approach is in using all subcarrier data of an OFDM signal for phase estimation, which then allows for the direct and efficient phase history computation in a method akin to multichannel azimuthal SAR processing. This fact also makes the proposed UWB OFDM SAR cross-range reconstruction resilient to narrowband interference and jamming, as well as allows for good waveform diversity/spectral flexibility potential. Simulation results demonstrating cross-range profile reconstructions are presented and discussed.
Keywords :
OFDM modulation; radar signal processing; synthetic aperture radar; ultra wideband communication; cross-range SAR reconstruction; estimated phase history; multicarrier OFDM signals; phase estimation; reconstruction via matched filtering; slow-time synthetic aperture radar signal processing; ultrawideband orthogonal frequency division multiplexing radar signals; History; Image reconstruction; Interference; OFDM; Synthetic aperture radar; Vectors; Orthogonal frequency division multiplexing; radar imaging phase history; slow-time reconstruction; synthetic aperture radar (SAR);
Journal_Title :
Geoscience and Remote Sensing Letters, IEEE
DOI :
10.1109/LGRS.2011.2182176