  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.
