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This Letter experimentally demonstrates a radio-frequency (RF) pilot-aided scheme for joint frequency offset and phase noise compensation in photonics-aided D-band multiple-input multiple-output-orthogonal frequency division multiplexing (MIMO-OFDM) systems. Using 16-quadrature amplitude modulation (16-QAM) and probabilistically shaped 64-QAM (PS-64QAM) signals, the proposed scheme achieves a noticeable signal-to-noise ratio (SNR) improvement while substantially reducing the pilot overhead. Owing to the reduced overhead, the net data rate is increased from 150 to 156 Gbit/s for 16-QAM and from 87 to 91 Gbit/s for PS-64QAM. These results demonstrate that the proposed RF pilot-aided scheme provides a spectrally efficient and low-complexity solution for joint frequency offset and phase noise compensation in broadband photonics-aided OFDM systems.
Li et al. (Fri,) studied this question.