Radar Weak Target Detection Method Based on Polarization Joint Eigenvalues
A radar weak target detection method based on polarization joint eigenvalues is proposed to address the issue of detecting weak targets in sea clutter background.This method utilizes multi-polarization channel echo data to calculate the maximum eigenvalue of the polarization coherence matrix.Then,the ratio between the maximum eigenva-lue of the target cell and the arithmetic average of the maximum eigenvalue,minimum eigenvalue,arithmetic mean,and geometric mean of the reference cell is used as a test statistic for decision-making.Simulation and experimental results of data processing demonstrate that the radar weak target detection method based on polarization joint eigenvalues out-performs the eigenvalue-based detection method by 2 dB,the polarimetric detection optimization filter by 1.5 dB,and the power maximization synthesis detection method and the span detection method by 5 dB.The polarimetric joint maxi-mum eigenvalue-geometric mean method achieves the best overall detection performance.
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