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An Adaptive Radar Target Detection Method Based on Alternate Estimation in Power Heterogeneous Clutter
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An Adaptive Radar Target Detection Method Based on Alternate Estimation in Power Heterogeneous Clutter
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An Adaptive Radar Target Detection Method Based on Alternate Estimation in Power Heterogeneous Clutter
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Journal Article
An Adaptive Radar Target Detection Method Based on Alternate Estimation in Power Heterogeneous Clutter
2024
Overview
Multichannel radars generally need to utilize a certain amount of training samples to estimate the covariance matrix of clutter for target detection. Due to factors such as severe terrain fluctuations and complex electromagnetic environments, the training samples usually have different statistical characteristics from the data to be detected. One of the most common scenarios is that all data have the same clutter covariance matrix structure, while different data have different power mismatches, called power heterogeneous characteristics. For detection problems in the power heterogeneous clutter environments, we propose detectors based on alternate estimation, using the generalized likelihood ratio test (GLRT) criterion, Rao criterion, Wald criterion, Gradient criterion, and Durbin criterion. Monte Carlo simulation experiments and real data indicate that the detector based on the Rao criterion has the highest probability of detection (PD). Furthermore, when signal mismatch occurs, the detector based on the GLRT criterion has the best selectivity, while the detector based on the Durbin criterion has the most robust detection performance.
