ZHANG Shuang-xi, ZHANG Lei, LIU Yan-yang, et al. Interference Suppression Algorithm for SAR Based on Short-Time Fourier Transform and Wavelet Transform[J]. Acta Electronica Sinica, 2011, 39(7): 1581-1588.
ZHANG Shuang-xi, ZHANG Lei, LIU Yan-yang, et al. Interference Suppression Algorithm for SAR Based on Short-Time Fourier Transform and Wavelet Transform[J]. Acta Electronica Sinica, 2011, 39(7): 1581-1588.DOI:
As the two most common forms of interference in synthetic aperture radar (SAR).Narrow-band interference (NBI) and wide-band interference (WBI) significantly reduce the quality of SAR images.Based on the analysis of the time-frequency concentration of NBI and WBI
an interference suppression algorithm for SAR is proposed.In the algorithm
SAR echo data is transformed into the short time Fourier transform spectrum domain
and then it is transformed into the wavelet domain.In the wavelet domain
the constant false alarm rate (CFAR) algorithm is employed to operate interference identification and suppression.After that
a clear and noninterference SAR image can be obtained by using a conventional SAR imaging algorithm.This algorithm brings less loss to useful data during interference suppression
and can efficiently suppress the time-varying NBI and WBI.The processing results of the simulation and the real measured data prove the effectiveness of this alaorithm.