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  • Received: Mar. 10, 2020

    Accepted: Apr. 26, 2020

    Posted: Sep. 1, 2020

    Published Online: Sep. 16, 2020

    The Author Email: Qiao Lingbo (lukethu@mail.tsinghua.edu.cn)

    DOI: 10.3788/CJL202047.0909002

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    Yijie Niu, Xing Liu, Lingbo Qiao. Fast Backpropagation Algorithm for Millimeter-Wave Holographic Imaging[J]. Chinese Journal of Lasers, 2020, 47(9): 0909002

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Chinese Journal of Lasers, Vol. 47, Issue 9, 0909002 (2020)

Fast Backpropagation Algorithm for Millimeter-Wave Holographic Imaging

Niu Yijie1,2, Liu Xing1,3, and Qiao Lingbo3,*

Author Affiliations

  • 1Department of Engineering Physics, Tsinghua University, Beijing 100084, China
  • 2China Academy of Civil Aviation Science and Technology, Beijing 100028, China
  • 3National Engineering Laboratory for Dangerous Articles and Explosives Detection Technologies, Beijing 100084, China

Abstract

To further improve the reconstruction speed under the premise of high-resolution millimeter-wave images, a fast backpropagation algorithm based on the dimensionality reduction strategy (DR-BP) is proposed. The proposed algorithm was experimentally verified via submillimeter-wave single-input and single-output (SISO) imaging (280-320 GHz) and orthogonal array multiple-input and multiple-output (MIMO) FEKO simulation imaging (70-80 GHz). The experimental results indicate that the DR-BP algorithm is able to obtain images with less margin interference compared with the fast Fourier transform-based algorithms for SISO imaging. Moreover, the DR-BP algorithm significantly improves the reconstruction speed—60 times that of the traditional BP algorithm, as shown by the results of the experiments.

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