High resolution angle measurement method for cascaded millimeter wave radar based on sparse matrix completion
Cascaded millimeter wave radar cascades multiple radio frequency chips to realize large-scale multiple-input multiple-output(MIMO)antenna array.However,the existing angle measurement methods of millimeter wave radar have problems such as insufficient accuracy and high sidelobes.To solve these problems,a high resolution angle measurement method for cascaded millimeter wave radar is proposed based on sparse matrix completion.Firstly,a two-dimensional sparse array signal model of the cascaded millimeter wave radar is established.Then,the single snapshot signal of the array is converted into a low-rank Hankel matrix,the weighted inexact augmented Lagrange multiplier method is used for sparse matrix completion,and the completed matrix is converted into the single snapshot signal of uniform virtual array.Finally,conventional beamforming(CBF)method is used to estimate the angles of the targets and the angles of the targets are paired.The simulation and experimental results show that the proposed method can accurately estimate the angles of the targets and effectively suppress peak sidelobe level.
cascaded millimeter wave radardirection of arrival(DOA)estimationsparse matrixmatrix completion
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