Self-Interference Cancellation for Full-Duplex in Spatial-Polarized Domain

Self-interference cancellation is critical in full duplex networks and its mitigation capability is limited mainly due to the phase noise caused by imperfect local oscillators. In this paper, a novel self-interference cancellation scheme in spatial-polarized domain is analyzed for full duplex systems. In spatial-polarized domain, spatially isolated polarized antennas are used to transport signals based on the polarized system and signal models. Then the SI is cancelled by polarization processing with the rebuilt SI signal. Theoretical analysis and simulation show that the proposed scheme can mitigate the effect of phase noise on SI cancellation, and improve data rate comparing with that in polarized domain.