Time division in a pulse polarimetric radar based ISAR fusion imaging technique

Fully polarimetric radar shows advantage in measuring scattering mechanisms and target scattering characteristics over single polarimetric radar. Aiming at dealing with the distortion of the target polarimetric properties caused by traditional time division between pulses (TDBP) polarimetric radar, time division in a pulse (TDIP) polarimetric radar is studied in this paper. The model of this novel polarimetric radar is established firstly. By analyzing the envelope and phase property of the intermediate frequency (IF) direct sampling echoes, pre-processing is carried out to different polarimetric channels based on the delay and the velocity measured by the narrow band. In an effort to achieving a fusion of different polarimetric channels, the translation motion is compensated jointly under the constraint of reciprocity. Pauli decomposition is employed to construct an RGB image which can describe the scattering mechanisms better. The results of simulated data prove the effectiveness of the proposed approach.