A Novel Phase Noise Mitigation Method for Full-Duplex Transceivers

Phase noise shows significant impacts on full-duplex (FD) communications, particularly in scenarios with high transmission power and complex multipath self-interference (SI) propagation environments. In this paper, a novel transceiver architecture is proposed to mitigate the phase noise by using two receive chains, where the receiver oscillator signals are originated from the transmitter oscillator with different delays. A self-interference (SI) cancellation algorithm is developed to work with the proposed architecture, and its cancellation capability is derived in closed-form. Analytical and simulation results show that the proposed method performs better in cases with high received SI power and low-quality oscillators.