TY - GEN
T1 - Performance analysis of two-step algorithm in sliding spotlight space-borne SAR
AU - Liu, Feifeng
AU - Ding, Zegang
AU - Zeng, Tao
AU - Long, Teng
PY - 2010
Y1 - 2010
N2 - The focusing performances of two-step algorithm are analyzed in the paper. The convolution processing in two-step algorithm is detailed analyzed. It can be found that the operation can reduce the Doppler bandwidth effectively and overcome the alias of azimuth echo by making the residual Doppler bandwidth smaller than PRF. The formula of residual Doppler bandwidth is derived here. According to the formula, range large bandwidth signal has influence on the residual Doppler bandwidth, which is not considered in the traditional imaging algorithm. In the high resolution sliding spotlight space-borne SAR system, the residual Doppler bandwidth is affected largely by the wide range bandwidth. PRF should be larger than the residual Doppler bandwidth in two-step algorithm; else it will result in defocus of the SAR image. The computer simulation is given to verify the presented analysis.
AB - The focusing performances of two-step algorithm are analyzed in the paper. The convolution processing in two-step algorithm is detailed analyzed. It can be found that the operation can reduce the Doppler bandwidth effectively and overcome the alias of azimuth echo by making the residual Doppler bandwidth smaller than PRF. The formula of residual Doppler bandwidth is derived here. According to the formula, range large bandwidth signal has influence on the residual Doppler bandwidth, which is not considered in the traditional imaging algorithm. In the high resolution sliding spotlight space-borne SAR system, the residual Doppler bandwidth is affected largely by the wide range bandwidth. PRF should be larger than the residual Doppler bandwidth in two-step algorithm; else it will result in defocus of the SAR image. The computer simulation is given to verify the presented analysis.
UR - http://www.scopus.com/inward/record.url?scp=77954943286&partnerID=8YFLogxK
U2 - 10.1109/RADAR.2010.5494479
DO - 10.1109/RADAR.2010.5494479
M3 - Conference contribution
AN - SCOPUS:77954943286
SN - 9781424458127
T3 - IEEE National Radar Conference - Proceedings
SP - 965
EP - 968
BT - 2010 IEEE Radar Conference
T2 - IEEE International Radar Conference 2010, RADAR 2010
Y2 - 10 May 2010 through 14 May 2010
ER -