MIMO On-Frequency Repeater with Self-Interference Cancellation and Mitigation

Abstract

In this paper, we consider the idea of a MIMO on- frequency repeater (OFR), with end-to-end MIMO channel rank preservation, MIMO aware repeater output-to-input self- interference cancellation, and a new repeater output-to-input beamforming based interference mitigation method for MIMO signals. The latter is used to increase the repeater output-to-input isolation and in turn increase the communication rate and range. The MIMO-OFR idea is compared via simulation to two 2-phase forwarding methods. Through simulation, we observe higher mean channel capacity and improved outage probability for the proposed idea. The viability of the interference feedback mitigation method is also discussed by considering a reflection channel and channel estimation errors for the output-to-input channel, indicating positive potential worth exploring further.