Phase Noise Compensation for OFDM Systems

TL;DR

This paper introduces a low complexity, time domain phase noise compensation method for OFDM systems, utilizing the Karhunen-Loève representation and extending to multiuser MIMO, with simulation validation.

Contribution

It proposes a novel phase noise estimation approach using Karhunen-Loève basis and extends compensation techniques to multiuser MIMO OFDM systems.

Findings

Improved phase noise estimation accuracy.

Effective compensation in multiuser MIMO OFDM.

Validated performance with simulated and measured noise.

Abstract

We describe a low complexity method for time domain compensation of phase noise in OFDM systems. We extend existing methods in several respects. First we suggest using the Karhunen-Lo\'{e}ve representation of the phase noise process to estimate the phase noise. We then derive an improved datadirected choice of basis elements for LS phase noise estimation and present its total least square counterpart problem. The proposed method helps overcome one of the major weaknesses of OFDM systems. We also generalize the time domain phase noise compensation to the multiuser MIMO context. Finally we present simulation results using both simulated and measured phased noise. We quantify the tracking performance in the presence of residual carrier offset.