On the MIMO Capacity with Residual Transceiver Hardware Impairments
Paper i proceeding, 2014

Radio-frequency (RF) impairments in the transceiver hardware of communication systems (e.g., phase noise (PN), high power amplifier (HPA) nonlinearities, or in- phase/quadrature-phase (I/Q) imbalance) can severely degrade the performance of traditional multiple-input multiple-output (MIMO) systems. Although calibration algorithms can partially compensate these impairments, the remaining distortion still has substantial impact. Despite this, most prior works have not analyzed this type of distortion. In this paper, we investigate the impact of residual transceiver hardware impairments on the MIMO system performance. In particular, we consider a transceiver impairment model, which has been experimentally validated, and derive analytical ergodic capacity expressions for both exact and high signal-to-noise ratios (SNRs). We demonstrate that the capacity saturates in the high-SNR regime, thereby creating a finite capacity ceiling. We also present a linear approximation for the ergodic capacity in the low-SNR regime, and show that impairments have only a second-order impact on the capacity. Furthermore, we analyze the effect of transceiver impairments on large-scale MIMO systems; interestingly, we prove that if one increases the number of antennas at one side only, the capacity behaves similar to the finite-dimensional case. On the contrary, if the number of antennas on both sides increases with a fixed ratio, the capacity ceiling vanishes; thus, impairments cause only a bounded offset in the capacity compared to the ideal transceiver hardware case.

hardware impairments

channel capacity

massive MIMO

MIMO

Författare

Xinlin Zhang

Chalmers, Signaler och system, Signalbehandling och medicinsk teknik, Signalbehandling

Michail Matthaiou

Chalmers, Signaler och system, Signalbehandling och medicinsk teknik, Signalbehandling

Emil Björnson

Ericsson Sweden

Nokia Oy

Mikael Coldrey

Nokia Oy

M. Debbah

Nokia Oy

IEEE International Conference on Communications, ICC 2014, Sydney, Australia

5299-5305 6884163

Styrkeområden

Informations- och kommunikationsteknik

Ämneskategorier

Kommunikationssystem

Elektroteknik och elektronik

DOI

10.1109/ICC.2014.6884163

ISBN

978-147992003-7

Mer information

Senast uppdaterat

2018-09-06