Outdoor experimental evaluation of asynchronous successive interference cancellation for 5G in shared spectrum with different radio systems

Abstract

This paper demonstrates the feasibility of interference cancellation for 5G receivers applicable for spectrum sharing with different radio systems through field experiments. In the demonstration system, the receiver cancels the signals of the existing primary radio system that are received asynchronously with respect to the 5G signal by implementing real-time signal processing on the field-programmable gate array. Through experiments, we confirm that the proposed asynchronous successive interference cancellation method can reduce interference and improve the block error rate performance significantly in the region where the received power level of the interference signal is high.