An Improved Vibration Parameter Estimation Method Applied for GB-MIMO Radar

A ground-based multiple-input multiple-output (GB-MIMO) radar is capable of performing structural health monitoring through vibration monitoring. However, when a target's vibration frequency is comparable to the image acquisition frequency of MIMO radar, its vibration can affect the vibration parameters estimation based on the pixel's phase series. In this letter, the impact of target vibration on the pixel series is analyzed. A robust method for vibration parameter estimation is proposed by operating iteration between the series compensation and the estimation. The correctness and effectiveness of the proposed method are verified by both simulation and calibrator experiments.