Experimental Study of the Phase Noise in K-band ARoF systems for Low Complexity 5G receivers

TL;DR

This paper presents an experimental analysis of phase noise in 25 GHz ARoF systems for beyond 5G, proposing a low-complexity phase noise mitigation method that outperforms previous algorithms.

Contribution

It introduces an improved LI-CPE algorithm that reduces delay and enhances phase noise mitigation in high-frequency ARoF systems.

Findings

The proposed method outperforms previous LI-CPE versions.

Phase noise mitigation effectiveness varies with subcarrier spacing.

Experimental validation confirms improved performance at different noise levels.

Abstract

In this paper, an experimental analysis of the phase noise in an OFDM ARoF setup at 25 GHzfor beyond 5G is presented. The configuration of the setup allows to gradually scale the final phase noise level of the system. Moreover, an OFDM phase noise mitigation method with low complexity and delay is proposed and explained. The proposed method is an advanced version of the LI-CPE algorithm. The advanced LI-CPE version avoids the one OFDM symbol delay of its antecedent. In addition, the yields of using both methods are shown under different phase noise levels and with different subcarrier spacings. Finally, it is experimentally proven that the proposed method performs better than its previous version.