Moving Target Scattering Matrix Measurement Using the Three Polarizations Scheme

For classical alternate measurement schemes, the motion of the target during polarization switching introduces additional phase errors in measuring the polarization scattering matrix (PSM). In this letter, we address the moving target PSM measurement problem by alternately transmitting three polariz...

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Bibliographic Details
Published in:IEEE geoscience and remote sensing letters 2019-10, Vol.16 (10), p.1555-1559
Main Authors: Li, Chao, Yang, Yong, Wang, Xue-Song, Li, Yong-Zhen
Format: Article
Language:English
Subjects:
Coefficients
Correlation coefficient
Correlation coefficients
Estimation
Hardware
Measurement
Measurement uncertainty
Motion measurement
moving target
Noise levels
Phase measurement
Polarimetric radar
Polarization
polarization scattering matrix (PSM)
Radar
Scattering
Signal to noise ratio
three polarizations (3-Pol)
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Summary:For classical alternate measurement schemes, the motion of the target during polarization switching introduces additional phase errors in measuring the polarization scattering matrix (PSM). In this letter, we address the moving target PSM measurement problem by alternately transmitting three polarizations (3-Pol). We fully discuss the problem, including 3-Pol generation, the optimal polarization selection, and the corresponding PSM estimation, as a complete measurement approach. This measurement approach is robust to different PSMs, and its performance is not affected by the movement of the target. Compared with the classical schemes, this approach will benefit a 13-dB signal-to-noise ratio (SNR) increase for targets with small cross-polar components. Furthermore, when the SNR is greater than 15 dB, the mean of the polarized correlation coefficients is higher than 0.95. Conclusions presented in this letter are validated by the experimental results.
ISSN:1545-598X
1558-0571
DOI:10.1109/LGRS.2019.2905244