Effect of Synchronizing Coordinated Base Stations on Phase Noise Estimation

TL;DR

This paper investigates how phase synchronization between coordinated base stations impacts oscillator phase noise estimation in multi-point transmission systems, deriving bounds that highlight the importance of synchronization quality.

Contribution

It introduces a Bayesian Cramér-Rao bound for phase noise estimation that explicitly depends on the synchronization level between base stations.

Findings

Synchronization quality significantly affects phase noise estimation accuracy.

Better synchronization leads to lower estimation bounds.

The derived bound quantifies the impact of synchronization on system performance.

Abstract

In this paper, we study the problem of oscillator phase noise (PN) estimation in coordinated multi-point (CoMP) transmission systems. Specifically, we investigate the effect of phase synchronization between coordinated base stations (BSs) on PN estimation at the user receiver (downlink channel). In this respect, the Bayesian Cram\'er-Rao bound for PN estimation is derived which is a function of the level of phase synchronization between the coordinated BSs. Results show that quality of BS synchronization has a significant effect on the PN estimation.