Time Variant RFI Suppression for SAR Using Iterative Adaptive Approach

Under the condition of time variant RFI, the limitation of training sample size causes great performance degradation of the conventional Radio Frequency Interference (RFI) suppression algorithm based on eigen-subspace projection (ESP) method. A novel RFI suppression method using iterative adaptive approach (IAA) and orthogonal subspace projection (OSP) method is proposed for synthetic aperture radar (SAR). Dispensing with parametric search and model order estimation, the proposed method estimates the RFI power spectrum adaptively and iteratively, utilizing few training samples and filtering the RFI based on the OSP method. Both the simulation and experimental results are provided to illustrate the performance of the proposed method.

[1]  Kenneth Abend,et al.  Radio and TV interference extraction for ultrawideband radar , 1995, Defense, Security, and Sensing.

[2]  Mengdao Xing,et al.  Narrow-Band Interference Suppression for SAR Based on Complex Empirical Mode Decomposition , 2009, IEEE Geoscience and Remote Sensing Letters.

[3]  Hao Zhou,et al.  Radio frequency interference suppression in small-aperture high-frequency radars , 2012, IEEE Geoscience and Remote Sensing Letters.

[4]  Mats I. Pettersson,et al.  RFI Suppression in Ultrawideband SAR Using an Adaptive Line Enhancer , 2010, IEEE Geoscience and Remote Sensing Letters.

[5]  S. Buckreuss,et al.  E-SAR P-band SAR subsystem design and RF-interference suppression , 1998, IGARSS '98. Sensing and Managing the Environment. 1998 IEEE International Geoscience and Remote Sensing. Symposium Proceedings. (Cat. No.98CH36174).

[6]  Ting Li,et al.  HF Radio-Frequency Interference Mitigation , 2010, IEEE Geoscience and Remote Sensing Letters.

[7]  L. Potter,et al.  RFI suppression for ultra wideband radar , 1997, IEEE Transactions on Aerospace and Electronic Systems.

[8]  Lars M. H. Ulander,et al.  RFI suppression in ultra-wideband SAR systems using LMS filters in frequency domain , 2001 .

[9]  Jian Li,et al.  Source Localization and Sensing: A Nonparametric Iterative Adaptive Approach Based on Weighted Least Squares , 2010, IEEE Transactions on Aerospace and Electronic Systems.

[10]  James M. Ralston,et al.  Signal processing approaches to radio frequency interference (RFI) suppression , 1994, Defense, Security, and Sensing.

[11]  A. Monti Guarnieri,et al.  Removing RF interferences from P-band airplane SAR data , 1996, IGARSS '96. 1996 International Geoscience and Remote Sensing Symposium.

[12]  Y. Liu,et al.  RFI suppression in SAR based on approximated spectral decomposition algorithm , 2012 .

[13]  Mengdao Xing,et al.  Eigensubspace-Based Filtering With Application in Narrow-Band Interference Suppression for SAR , 2007, IEEE Geoscience and Remote Sensing Letters.