Wang Mingxu, Yu Jianjun, Zhao Xianming, Bian Chengzhen, Zhou Wen, Wang Kaihui
Opt Lett. 2024 May 15;49(10):2801-2804. doi: 10.1364/OL.521380.
We propose a non-uniform-quantization digital-analog radio-over-fiber (NUQ-DA-RoF) scheme based on an advanced K-means NUQ algorithm and demonstrate it experimentally in a 2-m 300-GHz photonics-aided wireless fronthaul system. Results show that the NUQ-DA-RoF scheme achieves a SNR gain of ∼1.9 dB compared to the uniform-quantization DA-RoF (UQ-DA-RoF) at an equivalent Common Public Radio Interface equivalent data rate (CPRI-EDR). Remarkably, the NUQ-DA-RoF scheme exhibits an ∼1.6-dB power sensitivity enhancement over the UQ-DA-RoF at the 256-QAM SNR threshold. These findings highlight the advantages of the NUQ-DA-RoF scheme over UQ-DA-RoF in terms of power budget and SNR improvement, suggesting promising prospects for future radio access networks and wireless fronthaul.
我们提出了一种基于先进的K均值非均匀量化算法的非均匀量化数字模拟光纤无线（NUQ-DA-RoF）方案，并在一个2米的300吉赫兹光子辅助无线前传系统中进行了实验验证。结果表明，在等效通用公共无线接口等效数据速率（CPRI-EDR）下，与均匀量化DA-RoF（UQ-DA-RoF）相比，NUQ-DA-RoF方案实现了约1.9分贝的信噪比增益。值得注意的是，在256-QAM信噪比阈值下，NUQ-DA-RoF方案比UQ-DA-RoF表现出约1.6分贝的功率灵敏度增强。这些发现突出了NUQ-DA-RoF方案在功率预算和信噪比改善方面优于UQ-DA-RoF的优势，为未来的无线接入网络和无线前传展示了广阔的前景。
