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Fast fourier-based implementation of synthetic aperture radar algorithm for multistatic imaging system

Abbasi, M ; Sharif University of Technology | 2018

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  1. Type of Document: Article
  2. DOI: 10.1109/TIM.2018.2875769
  3. Publisher: Institute of Electrical and Electronics Engineers Inc , 2018
  4. Abstract:
  5. Multistatic millimeter-wave imaging structures are superior to their monostatic counterparts for imaging natural objects of sudden profile variations. Multistatic image reconstruction is conventionally performed via synthetic aperture radar (SAR)-based methods which, in spite of their high accuracy, are computationally burdensome. On the other side, the Fourier-based image reconstruction in multistatic systems also faces few challenges including multidimensional interpolation, a plane-wave approximation of spherical waves, and k-space partitioning. This paper presents a fast implementation of the SAR-based image reconstruction method in case of 1-D and 2-D multistatic arrays. The proposed implementation is Fourier based across the uniform direction in k-space and SAR based along the nonuniform direction. Both methods are fully parallelizable and are arranged into a vector format to maximize memory usage and minimize the computational time. The extensive validation and benchmarking have been performed with both simulation and experimental data, which proves a 256x improvement in the reconstruction time for the worst case scenario compared to that of in SAR-based methods with the same image quality. Furthermore, the reconstructed image performance is around 10x better than the most recent Fourier-based reconstruction method, in terms of root-mean-square error metric, and with 28x less computational time. IEEE
  6. Keywords:
  7. Image reconstruction ; Interpolation ; Millimeter-wave (MMW) imaging ; Multistatic structure ; Receivers ; Reconstruction algorithms ; Synthetic aperture radar (SAR) ; Transmitters ; Benchmarking ; Fourier transforms ; Image enhancement ; Image quality ; Mean square error ; Millimeter waves ; Multistatic radars ; Receivers (containers) ; Space-based radar ; Image reconstruction methods ; Millimeter wave (MMW) ; Multi-static ; Multidimensional interpolations ; Reconstruction method ; Root mean square errors ; Radar imaging
  8. Source: IEEE Transactions on Instrumentation and Measurement ; 2018 ; 00189456 (ISSN)
  9. URL: https://ieeexplore.ieee.org/document/8516366