Joint Filtering of Space-frequency-polarization Domain Based on Vector Sensitive Array

Multi-domain signal filtering is a perspective technology in both radar and wireless communication systems. To obtain extra benefits compared with conventional methods, a novel joint space-frequency-polarization filter (SFPF) based on vector sensitive array (VSA) is presented in this paper. An orthogonal dual-polarization sensitive array (DPSA) and time delay units are applied to offer frequency, polarization and spatial information. Then the SFPF is constructed with oblique projection operators to suppress the interferences and extract the target signals without introducing any phase amplitude distortion. Performance analysis and simulation are undertaken. It can be concluded that the signal can be recovered more effectively compared with a space-polarization filter (SPF), since more information in multiple domains are utilized in the proposed SFPF.