Sidelobe Reduction for UWB Radar Images Based on Spatial Spectrum Segmentation

In ultra-wideband (UWB) radar imaging applications, high level sidelobes have serious impact on the image quality. In this paper, we analyzed the relationship between point spread function (PSF) and spatial spectrum supporting region, and proposed a method based on spatial spectrum segmentation to improve the image quality. The proposed method reduces the sidelobes and remains the main lobe simultaneously. The simulation and real data results validate the effective, robust and uncomplicated method.

[1]  Mats I. Pettersson,et al.  2D apodization in UWB SAR using linear filtering , 2011, 2011 IEEE International Geoscience and Remote Sensing Symposium.

[2]  C. Balanis,et al.  Minimum Sidelobe Levels for Linear Arrays , 2007, IEEE Transactions on Antennas and Propagation.

[3]  M. Amin.  Through-the-Wall Radar Imaging , 2011 .

[4]  Xiaotao Huang,et al.  Grating Lobe Suppression in Sparse Array-Based Ultrawideband Through-Wall Imaging Radar , 2016, IEEE Antennas and Wireless Propagation Letters.

[5]  James R. Fienup,et al.  Nonlinear apodization for sidelobe control in SAR imagery , 1995 .

[6]  L.P. Ligthart,et al.  A sidelobe reduction technique for enhancing images of UWB sparse MIMO array , 2009, 2009 International Radar Conference "Surveillance for a Safer World" (RADAR 2009).

[7]  Zhimin Zhou,et al.  Non-orthogonal Sidelobes Reduction for Virtual Aperture UWB Radar: Non-orthogonal Sidelobes Reduction for Virtual Aperture UWB Radar , 2013 .

[8]  N. Deepika Rani,et al.  Linear Array Geometry Synthesis Using Genetic Algorithm for Optimum Side Lobe Level and Null , 2012 .

[9]  Yi Su,et al.  Sidelobe reduction based on spectrum reshaping in microwave imaging , 2010, Science China Information Sciences.

[10]  Y. Rahmat-Samii,et al.  Advances in Particle Swarm Optimization for Antenna Designs: Real-Number, Binary, Single-Objective and Multiobjective Implementations , 2007, IEEE Transactions on Antennas and Propagation.

[11]  Hu Jun,et al.  An Entropy-Based MIMO Array Optimization for Short-Range UWB Imaging , 2016 .

[12]  Stuart R. DeGraaf,et al.  Sidelobe reduction via adaptive FIR filtering in SAR imagery , 1994, IEEE Trans. Image Process..

[13]  Mats I. Pettersson,et al.  An Impulse Response Function for Evaluation of UWB SAR Imaging , 2010, IEEE Transactions on Signal Processing.

[14]  Jin Tian,et al.  Study on Antenna Configuration of Virtual Aperture and Its Associated Imaging Performance , 2011 .