Novel Digital Self-Interference Cancellation with High Dynamic Range in Full-Duplex Communications

Digital self-interference cancellation is a potential technique for full-duplex (FD) communication system. However, for digital self- interference (SI) cancellation, limited dynamic range of analog-to-digital converters (ADCs) is a severe challenge. Against this background, a dynamic range (DR) expanding scheme for ADC based on detail information compensation is proposed in this paper, in order to improve the DR of ADCs. Moreover, channel estimation is performed on the basis of half-duplex (HD) training for digital SI cancellation. Analytical and simulation results demonstrate the effectiveness of the proposed scheme as a viable solution for full-duplex communication system.