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A SAR imaging method with sparse aperture and frequency using stepped-frequeney waveform
GU Fufei, ZHANG Qun, LOU Hao, YANG Qiu, CHEN Yichang
ACTA AERONAUTICAET ASTRONAUTICA SINICA . 2015, (4): 1221 -1229 .  DOI: 10.7527/S1000-6893.2014.0177