A multi-domain collaborative filter based on polarization sensitive frequency diverse array

Traditional approaches for interference suppression will enjoy the added benefits when more domains are involved in antenna array. However, the information from range domain and its collaboration with other domains are rarely explored, and their potentials in improvement of radar performance are under-estimated. In this paper, we introduce the concept of polarization sensitive frequency diverse array (PSFDA), which combined frequency diverse array (FDA) and polarization sensitive array (PSA). This generates a range-angle-polarization resolution, which provides a possibility of simultaneous filtering in direction, polarization and range. In exploration of those inherent informations, we present a series of multi-domain collaborative oblique projection filters by PSFDA. The representative filters of oblique projection angle-range-polarization filter (OPARPF), oblique projection angle-range filter (OPARF) and oblique projection angle filter (OPAF) are discussed. Theoretical analysis and simulation results demonstrate that in addition to direction filtering, the performances of the filters improve with range and polarization domain incorporated. In addition, the generalized form of filter discussed provides a platform for future research and development which can refer to the approach presented in this paper.