Measurement-based characterization of residual self-interference on a full-duplex MIMO testbed

Full-duplex communication systems require very strong self-interference suppression. Unfortunately, perfect suppression is not possible in practice and some residual self-interference remains. This residual self-interference acts as additive noise whose statistical properties may be different from those of thermal noise. This work presents a measurement-based study of the statistical properties of residual self-interference on an OFDM based full-duplex MIMO testbed. Moreover, we quantify the effect that residual self-interference has on some popular MIMO receivers and we employ a strategy to reduce the performance impact of residual-self interference.