Positive-Negative Array-Element Based Single-Antenna Full-Duplex Self-Interference Mitigation

Abstract

Full-duplex (FD), where the terminal transmits and receives signals simultaneously using the same frequency-band and time-slots, has been treated as one of the potential candidate techniques to enhance the spectrum of future wireless communications. However, one of critical problems in wireless FD communications is how to efficiently mitigate the self-interference (SI) while achieving the maximum spectrum efficiency. In this paper, we develop novel positive-negative array-element based SI mitigation scheme for wireless FD communications. In particular, we formulate the system model for positive-negative array-element based SI mitigation scheme. Then, based on the system model, we analyze the performance of the SI mitigation scheme. Simulation results verify our theoretical analyses and show that our developed SI mitigation schemes can significantly reduce SI for wireless FD communications.