5 Gbps optical wireless communication using commercial SPAD array receivers
5 Gbps optical wireless communication using commercial SPAD array receivers
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DOI：
10.1364/ol.454994
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发表时间：
2022-05-01
期刊：
影响因子：
3.6
通讯作者：
Safari, Majid
中科院分区：
文献类型：
--
作者：
Huang, Shenjie;Chen, Cheng;Safari, Majid
光子计数探测器，如单光子雪崩二极管（SPAD）阵列，可以用来提高光无线通信（OWC）系统的灵敏度。然而，基于SPAD的OWC系统的可实现的数据速率受到由SPAD死区时间引起的非线性的强烈限制。在这项工作中，基于SPAD的正交频分复用（OFDM）的OWC系统的性能进行了研究，并与开关键控（00K）的性能进行了比较。我们采用非线性均衡，峰均功率比优化，通过调整OFDM限幅电平，自适应比特和能量加载，以实现一个记录的实验数据速率为5 Gbps。两个调制方案的操作的对比最佳制度也被证明。(C)2022光学出版集团
Photon counting detectors such as single-photon avalanche diode (SPAD) arrays can be used to improve the sensitivity of optical wireless communication (OWC) systems. However, the achievable data rate of SPAD-based OWC systems is strongly limited by the nonlinearity induced by the SPAD dead time. In this work, the performance of a SPAD-based OWC system with orthogonal frequency division multiplexing (OFDM) is investigated and compared with that of on-off keying (00K). We employ nonlinear equalization, peak-toaverage power ratio optimization by adjusting the OFDM clipping level, and adaptive bit and energy loading to achieve a record experimental data rate of 5 Gbps. The contrasting optimal regimes of operation of the two modulation schemes are also demonstrated. (C) 2022 Optica Publishing Group