Polarimetric Calibration of an FMCW Doppler Radar with Dual-Orthogonal Signals

Polarimetric Calibration of an FMCW Doppler Radar with Dual-Orthogonal Signals

Krasnov, O.A. (TU Delft Microwave Sensing, Signals & Systems)
Zhang, Q. (Student TU Delft)
Yarovoy, Alexander (TU Delft Microwave Sensing, Signals & Systems)

2024

In this paper, the full calibration chain of FMCW radar with simultaneous transmission of two orthogonally polarized orthogonal waveforms is considered. Specifically for this type of polarimetric radar, compensation of signals’ biases and equalization of the amplification gains of the parallel polarimetric channels in the receiver are jointly performed using the noise measurements. The calibrations of the absolute complex gains of the transmitter’s polarimetric channels together with complex antenna gains are done using the model-based fit of the measurements of the rotating dihedral reflector. Phase relations between polarimetric channels are treated in the Doppler domain using the unfolded velocity of the target. The performed calibration results in high-accurate measurements of the radar targets’ polarimetric scattering matrix (PSM) in the Doppler domain. All the proposed calibration steps are illustrated using real radar data.

radar polarimetry
polarimetric calibration
polarization scattering matrix measurements

http://resolver.tudelft.nl/uuid:29fd8dd3-454d-4e65-af70-5fa2b8dec048

https://doi.org/10.1109/CAMA57522.2023.10352897

979-8-3503-2304-7

2023 IEEE Conference on Antenna Measurements and Applications, CAMA 2023

IEEE International Conference on Antenna Measurements and Applications, 2023-11-15 → 2023-11-16, Genoa, Italy

IEEE Conference on Antenna Measurements and Applications, CAMA, 2474-1760

Institutional Repository

conference paper

© 2024 O.A. Krasnov, Q. Zhang, Alexander Yarovoy