Joint polarized and spatial domain anti-jamming method for GNSS

Because of the vulnerability of navigation signal, adaptive array processing plays a significant role in global navigation satellite system (GNSS) receivers. However, when the direction of arrival (DOA) of the desired signal coincides with that of the interference, the desired signal is mitigated which leads to a degradation of system performance. This paper utilizes antenna array´s polarization information and proposes a novel joint polarized and spatial anti-jamming (JPSA) method based on linearly constrained minimum variance (LCMV) criterion. Unlike traditional LCMV criterion, we propose a constraint matrix consisting of the steering vector of desired signal and interference, which can suppress the interference and enhance the desired signal effectively. Simulations in single and multiple interference scenarios show that the proposed method suppresses interference successfully while the DOA of desired signal is the same with that of interference.