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Application of Subband Spectral Cancellation for SAR Narrow-Band Interference Suppression

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4 Author(s)
Jin Feng ; Inst. of Electron., Beijing, China ; Huifang Zheng ; Yunkai Deng ; Dongsheng Gao

Narrow-band interference (NBI) suppression is an important technique in the low-frequency synthetic aperture radar (SAR). NBI sources either intentional or unintentional can mask the SAR signals and cause image degradation. According to the different characteristics of the spectra between the NBI and the SAR signals, a new method using subband spectral cancellation is applied to suppress the NBI. In contrast to the conventional suppression method performed on the raw data, this letter deals with the focused SAR image. By subtracting different range subband spectra of the SAR image, the NBIs are obtained and cancelled. The proposed method does not need to detect and estimate the parameters of the NBI and is easy to put in practice. Its performance is tested on the real data acquired by an experimental SAR system at P-band.

Published in:

Geoscience and Remote Sensing Letters, IEEE  (Volume:9 ,  Issue: 2 )