  For future wireless communication systems, full duplex is seen as a possible
solution to the ever present spectrum shortage. The key aspect to enable
In-Band Full Duplex (IBFD) is sufficient cancellation of the unavoidable
Self-Interference (SI). In this work we evaluate the performance of a low
complexity IBFD transceiver, including the required analog and digital
interference cancellation techniques. The Radio Frequency Self- Interference
Canceler (RFSIC) is based on the isolation of a circulator in combination with
a vector modulator regenerating the interference signal, to destructively
combine it with the received signal. On the digital side, a Digital
Self-Interference Cancellation (DSIC) algorithm based on non-linear adaptive
filtering is used. With the simplified analog front-end of a Software Defined
Radio (SDR) platform, SI cancellation of 90 dB is achieved with the presence of
a received signal.
