Title :
Velocity estimation of fast moving targets using undersampled SAR raw-data
Author :
Marques, Paulo A C ; Dias, José M B
Author_Institution :
ISEL-DEEC, Lisbon, Portugal
Abstract :
The paper presents a new methodology to retrieve slant-range velocity estimates for moving targets which induce a Doppler-shift beyond the Nyquist limit determined by the Pulse Repetition Frequency (PRF). The proposed scheme takes advantage of the fact that the range velocity of a moving target induces a Doppler-shift in the azimuth spectra which depends linearly on the fast-time frequency. We present results that take real and simulated SAR data
Keywords :
search radar; synthetic aperture radar; Doppler shift; Nyquist limit; Pulse Repetition Frequency; SAR; azimuth spectra; fast motion; fast-time frequency; measurement technique; method; moving object; radar surveillance; range velocity; slant range velocity estimates; synthetic aperture radar; undersampled data; vehicle; velocity estimation; Azimuth; Electrical capacitance tomography; Frequency estimation; Image reconstruction; Image retrieval; Information retrieval; Radar; Sampling methods; Signal resolution; Time frequency analysis;
Conference_Titel :
Geoscience and Remote Sensing Symposium, 2001. IGARSS '01. IEEE 2001 International
Conference_Location :
Sydney, NSW
Print_ISBN :
0-7803-7031-7
DOI :
10.1109/IGARSS.2001.977009
