Self-Interference in Full-Duplex Multi-User MIMO Channels

Arman Shojaeifard , Kai-Kit Wong (1) , Marco Di Renzo (2) , Gan Zheng (3) , Khairi Ashour Hamdi , Jie Tang (4)

1 Department of Electronic & Electrical Engineering [London]
2 L2S - Laboratoire des signaux et systèmes
3 CSEE - School of Computer Science and Electronic Engineering [Essex]
4 SUSTech - Southern University of Science and Technology

We consider a multi-user multiple-input multiple-output (MIMO) setup, where full-duplex multi-antenna nodes apply linear beamformers to simultaneously transmit and receive multiple streams over Rician fading channels. The exact first and second positive moments of the residual self-interference (SI), involving the squared norm of a sum of non-identically distributed random variables, are derived in closed-form. The method of moments is hence invoked to provide a Gamma approximation for the residual SI distribution. The proposed theorem holds under arbitrary linear precoder/decoder design, antenna array size, number of information streams, and SI cancellation capability.

Domaines: Réseaux et télécommunications [cs.NI]

Arman Shojaeifard, Kai-Kit Wong, Marco Di Renzo, Gan Zheng, Khairi Ashour Hamdi, et al.. Self-Interference in Full-Duplex Multi-User MIMO Channels. IEEE Communications Letters, 2017, 21 (4), pp.841 - 844. ⟨10.1109/LCOMM.2016.2647709⟩. ⟨hal-01880021⟩