Calibration of bistatic polarimetric radar systems

An investigation of bistatic calibration techniques

“…A rigorous mathematical process is necessary in order to solve for the subsystem distortion matrices simultaneously. Once the distortion matrices are computed, the corrected scattering matrix for the object under test is given by (4) where is the corrected scattering matrix, and is the measured matrix, with background subtraction performed. This relationship stems from (1), assuming that the subsystem distortion matrices are invertible [5].…”

Double directional UWB channel modelling using scatterer distribution imaging

“…The accuracy in the position determination could, theoretically, be reduced by increasing the frequency sweep, and by reducing the space gridding size (at the expense of computation load). However, the different scattering mechanisms of objects (specular reflection and creeping waves) [4] and the frequency variation of the radiation patterns of antennas severely affect the time delays computed.…”

An investigation of bistatic calibration objects

“…All calibration methods, however, have in common a basic relationship that provides an interpretation of the raw measurement of the object under test, based on the relationship between the calibration object measurement and its theoretical value. This fundamental relationship can be expressed as [1] ( 2) where is the calibrated response of the object. and are, respectively, the responses of the calibration object and the object under test.…”

“…F ULLY polarimetric, bistatic radar systems possess additional complexity and therefore additional systemic error sources above those for single-polarization, monostatic systems [1], [2]. These additional error sources can significantly affect the requirements of the calibration procedure and include cross-polarization leakage, crosstalk between the transmitter and receiver apertures, channel dissimilarities, and the unsuitability of test objects to bistatic configurations or polarization changes.…”