Photonics-assisted wideband RF self-interference cancellation with digital domain amplitude and delay pre-matching

A photonics-based digital and analog self-interference cancellation approach for in-band full-duplex communication systems frequency-modulated continuous-wave radar is reported. One dual-drive Mach-Zehnder modulator used to implement the by pre-adjusting delay amplitude of reference signal applied in domain. The determined via received power, while searched cross-correlation bisection methods. Furthermore, recursive least square or normalized mean algorithms are suppress residual Quadrature phase-shift keying modulated signals linearly experimentally verify proposed method. depth around 20 dB, total more than 36 dB 2-Gbaud quadrature signals. For signals, depths 19 34 respectively.