论文标题
基于SPAD的光学无线通信与ACO OFDM
SPAD-Based Optical Wireless Communication with ACO-OFDM
论文作者
论文摘要
通过使用高度敏感的单光雪崩二极管（SPAD）阵列，可以有效地提高光学通信（OWC）的敏感性。但是，死亡时间引入的非线性失真强烈限制了基于SPAD的OWC系统的吞吐量。光学正交频施加多路复用（OFDM）可以在具有SPAD阵列的系统中使用以提高光谱效率。在这项工作中，提出了对具有不对称的光学OFDM（ACO-OFDM）的基于SPAD的OWC系统的理论性能分析。研究了SPAD非线性对系统性能的影响。此外，提出了两种方案的独特可靠操作制度，提出了考虑的方案与直接偏置的光学OFDM（DCO-OFDM）的比较。在低功率制度中，ACO-OFDM的表现优于DCO-OFDM；而后者在高力量制度中更可取。
The sensitivity of the optical wireless communication (OWC) can be effectively improved by employing the highly sensitive single-photon avalanche diode (SPAD) arrays. However, the nonlinear distortion introduced by the dead time strongly limits the throughput of the SPAD-based OWC systems. Optical orthogonal frequency division multiplexing (OFDM) can be employed in the systems with SPAD arrays to improve the spectral efficiency. In this work, a theoretical performance analysis of SPAD-based OWC system with asymmetrically-clipped optical OFDM (ACO-OFDM) is presented. The impact of the SPAD nonlinearity on the system performance is investigated. In addition, the comparison of the considered scheme with direct-current-biased optical OFDM (DCO-OFDM) is presented showing the distinct reliable operation regimes of the two schemes. In the low power regimes, ACO-OFDM outperforms DCO-OFDM; whereas, the latter is more preferable in the high power regimes.
