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Citation: Wei WANG, Ziying HU, Linshu GONG. Adaptive Off-grid Calibration Method for MIMO Radar 3D Imaging[J]. Journal of Electronics and Information Technology, ;2019, 41(6): 1294-1301. doi: 10.11999/JEIT180145 shu

Adaptive Off-grid Calibration Method for MIMO Radar 3D Imaging

  • Corresponding author: Wei WANG, wangwei407@hrbeu.edu.cn
  • Received Date: 2018-02-02
    Accepted Date: 2019-03-22
    Available Online: 2019-06-01

Figures(7) / Tables(1)

  • In Compressive Sensing (CS) imaging algorithms, the true targets usually can not locate on the pre-defined grids exactly. Such Off-grid problems result in mismatch between true echo and measurement matrix, which seriously degrades the performance of radar imaging. An adaptive calibration method is proposed to solve the off-grid problems in MIMO radar Three-Dimensional (3D) imaging. Bayesian probability density functions can be constructed based on the sparse echo model of Off-grid targets, and the Maximum A Posteriori (MAP) method is used to obtain sparse imaging with mismatch errors. Compared with the traditional methods, the proposed method can make full use of mismatch parameters’ priori information and adaptively update the parameters, which can reduce the influence of mismatch errors, and achieve high-precision estimation for sparse targets and noise power. Finally, the simulation results confirm that the proposed method can effectively optimize mismatch errors with accurate and stable imaging performance.
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