The Polarization Modulation Based Self-Interference Cancellation for Full Duplex

Abstract

In full duplex systems, self-interference (SI) cancellation amounts is limited by the power amplifier (PA) nonlinear distortion. In this paper, to cancel the nonlinear SI induced by the PA, a SI cancellation scheme based on polarization modulation is proposed. The proposed scheme uses polarization state as the information-bearing parameter and can let the PA work in its nonlinear region without suffering distortion. The simulation results and analysis show that the proposed SI cancellation scheme can improve the bit error rate (BER) performance significantly when the PA nonlinear distortion exists in the system.