SSBI counteraction technology in a single photodetector-based direct detection system receiving an independent dual-single sideband signal.

IF 3.2 2区物理与天体物理 Q2 OPTICS

Optics express Pub Date : 2024-11-04 DOI:10.1364/OE.538293

Zheng Hu, Jiangnan Xiao, Yilin Chen, Jiabao Zhao, Feihan Li, Hangzhi Zhu

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引用次数: 0

Abstract

To further meet the large capacity, high spectrum efficiency (SE), reduce the signal-signal beat interference (SSBI) of the independent dual single sideband (ISB) system and the complexity of the receiver, we propose an iterative signal-signal beat interference counteraction (ISSBIC) algorithm to suppress SSBI. The 16-Gbps left sideband and the 16-Gbps right sideband signals in the ISB system are quadrature phase-shift keying (QPSK) modulated. After standard single-mode fiber (SSMF) transmission, the LSB and RSB signals are synthesized to a 16-quadrature amplitude modulation (QAM) signal after conversion through the photodetector (PD) square law. The simulation results show that the ISSBIC with just 2 iterations is superior to Kramers-Kronig (KK) receiver in processing the system error bit. In the meantime, the ISSBIC requires a sampling rate of 20GSa/s, whereas KK requires 40GSa/s. Moreover, the proposed ISSBIC algorithm has a simpler complexity. According to the simulation results, the suggested ISSBIC receiver can lower the ADC requirements and system costs, which opens up a wide range of applications in multiplex and higher SE transmission systems.

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基于单个光电探测器的直接检测系统中的 SSBI 反作用技术，可接收独立的双单边带信号。

为了进一步满足大容量、高频谱效率（SE）的要求，降低独立双单边带（ISB）系统的信号-信号节拍干扰（SSBI）和接收器的复杂性，我们提出了一种抑制 SSBI 的迭代信号-信号节拍干扰对抗（ISSBIC）算法。ISB 系统中的 16-Gbps 左侧带和 16-Gbps 右侧带信号采用正交相移键控（QPSK）调制。在标准单模光纤（SSMF）传输后，LSB 和 RSB 信号通过光电探测器（PD）平方律转换后合成为 16 正交振幅调制（QAM）信号。仿真结果表明，仅迭代 2 次的 ISSBIC 在处理系统误差比特方面优于 Kramers-Kronig (KK) 接收器。同时，ISSBIC 需要 20GSa/s 的采样率，而 KK 需要 40GSa/s 的采样率。此外，所提出的 ISSBIC 算法的复杂度更简单。根据仿真结果，建议的 ISSBIC 接收器可以降低 ADC 要求和系统成本，从而在多路和更高 SE 传输系统中获得广泛应用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Optics express 物理-光学

CiteScore

6.60

自引率

15.80%

发文量

5182

审稿时长

2.1 months

期刊介绍： Optics Express is the all-electronic, open access journal for optics providing rapid publication for peer-reviewed articles that emphasize scientific and technology innovations in all aspects of optics and photonics.