The projection-based self-interference cancellation scheme in the polarization domain

In this paper, we propose a self-interference cancellation scheme for the full duplex communication in the polarization domain. The proposed scheme cancels self-interference first by orthogonal projection to the null space of the self-interference before the analog to digital converter (ADC). Then, the theory of virtual polarization adaptation is used to maximize the desired signal power. Different from the existing schemes in the polarization domain, the scheme proposed in this paper is based on the virtual polarization technologies so that it´s more flexible than the existing schemes in polarization domain. This paper conducts theoretical analysis and simulation under the condition of Ricean channel. Analysis and simulation results verify that the proposed scheme has better cancellation performance and more adaptive to the Ricean fading channel than the existing schemes in the polarization domain.