TY - GEN
T1 - Doppler ambiguity estimation of stepped-frequency SAR system
AU - Kai, Jing
AU - Ji, Zhang
AU - Di, Yao
PY - 2013
Y1 - 2013
N2 - This paper presents a novel method to estimate the Doppler ambiguity number of the stepped-frequency synthetic aperture radar (SFSAR) system based 011 echo data. The method exploits characteristics of the stepped frequency signal. I11 the method, it's unnecessary to know the velocity of the platform ahead of time which is different from the traditional methods. Firstly, The method estimates the Doppler centroids of the sub-band signals. Secondly, it calculates the Doppler centroid and the Doppler ambiguity of the combined signal by curve fitting and theoretical calculation. Finally, The accuracy analysis and the simulation result are shown to verify the validity of this method.
AB - This paper presents a novel method to estimate the Doppler ambiguity number of the stepped-frequency synthetic aperture radar (SFSAR) system based 011 echo data. The method exploits characteristics of the stepped frequency signal. I11 the method, it's unnecessary to know the velocity of the platform ahead of time which is different from the traditional methods. Firstly, The method estimates the Doppler centroids of the sub-band signals. Secondly, it calculates the Doppler centroid and the Doppler ambiguity of the combined signal by curve fitting and theoretical calculation. Finally, The accuracy analysis and the simulation result are shown to verify the validity of this method.
KW - Airborne radar
KW - Doppler ambiguity
KW - Doppler centroid estimation
KW - Stepped-frequency SAR
UR - http://www.scopus.com/inward/record.url?scp=84894531936&partnerID=8YFLogxK
U2 - 10.1049/cp.2013.0204
DO - 10.1049/cp.2013.0204
M3 - Conference contribution
AN - SCOPUS:84894531936
SN - 9781849196031
T3 - IET Conference Publications
BT - IET International Radar Conference 2013
T2 - IET International Radar Conference 2013
Y2 - 14 April 2013 through 16 April 2013
ER -