Asymptotic Rate Analysis for Impairments-Aware Multi-Carrier FD Massive MIMO Relay Networks utilizing MRT/MRC Strategy

TL;DR

This paper derives the asymptotic rate of a multi-carrier full-duplex massive MIMO relay system considering hardware impairments, showing residual interference persists even with large antenna arrays.

Contribution

It provides a novel asymptotic rate analysis for MC FD massive MIMO relay systems accounting for hardware distortions and imperfect CSI, highlighting their persistent impact.

Findings

Hardware distortions significantly affect large-scale antenna systems.

Residual self-interference and inter-carrier leakage remain despite increasing antennas.

Multi-user interference diminishes as antenna count grows.

Abstract

In this paper, we analyze the asymptotic rate for a multi-carrier (MC) full-duplex (FD) massive multiple input multiple output (mMIMO) decode and forward (DF) relay system which serves multiple MC single-antenna half-duplex (HD) nodes. We take into account the impact of hardware distortions resulting in residual self-interference (SI) and inter-carrier leakage (ICL) as well as the impact of imperfect channel state information (CSI). We derive the asymptotic rate expression of our system employed with maximum ratio transmitting (MRT)/ maximum ratio combining (MRC) strategy when the number of the antenna becomes large (goes to $\infty$). It is noticed that the impact of hardware distortion becomes remarkable in a large-scale antenna array regime. On contrary to the effect of multi-user interference and receiver noise, which vanishes as the number of relay antenna goes to infinity, the residual SI and ICL caused by the hardware impairments remains in the MC system.