Carrier-Assisted Differential Detection for Indoor Optical Wireless Communications

IF 2.5 3区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Photonics Technology Letters Pub Date : 2025-07-30 DOI:10.1109/LPT.2025.3593958

Junyu Wu;Jianghao Li;Honglin Ji;William Shieh

引用次数: 0

Abstract

Self-coherent detection possesses superiority over intensity modulation direct detection and coherent detection due to its balance on spectrum efficiency and structure complexity. Consequently, self-coherent detection may also be feasible for indoor optical wireless communications (OWCs) due to its ability to recover complex-valued signal without a local oscillator laser. In this letter, for the first time, an indoor OWCs system employing carrier-assisted differential detection (CADD) receiver with a data rate of 50 Gb/s is proposed and experimentally verified. To comply with the eye and skin safety regulation, a free-space optical launch power of 6.5 dBm is set for free-space transmission. As a proof-of-concept, an indoor OWCs system experiment of 25 GBaud QPSK OFDM is demonstrated, achieving a data rate of 50Gb/s over 7.5 m free-space link with a sensitivity of −24 dBm. The result indicates the feasibility of CADD receiver for high-speed indoor OWCs systems.

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室内无线光通信载波辅助差分检测

自相干检测在频谱效率和结构复杂性上取得了平衡，比强度调制直接检测和相干检测具有优势。因此，由于自相干检测能够在没有本振激光器的情况下恢复复值信号，因此也可能适用于室内光学无线通信（OWCs）。本文首次提出了一种数据速率为50 Gb/s的载波辅助差分检测（CADD）接收机的室内OWCs系统，并进行了实验验证。出于对眼睛和皮肤安全的考虑，自由空间光发射功率设置为6.5 dBm。作为概念验证，演示了25 GBaud QPSK OFDM的室内OWCs系统实验，在7.5 m自由空间链路上实现了50Gb/s的数据速率，灵敏度为- 24 dBm。结果表明，CADD接收机用于高速室内光控系统是可行的。

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

IEEE Photonics Technology Letters 工程技术-工程：电子与电气

CiteScore

5.00

自引率

3.80%

发文量

404

审稿时长

2.0 months

期刊介绍： IEEE Photonics Technology Letters addresses all aspects of the IEEE Photonics Society Constitutional Field of Interest with emphasis on photonic/lightwave components and applications, laser physics and systems and laser/electro-optics technology. Examples of subject areas for the above areas of concentration are integrated optic and optoelectronic devices, high-power laser arrays (e.g. diode, CO2), free electron lasers, solid, state lasers, laser materials'' interactions and femtosecond laser techniques. The letters journal publishes engineering, applied physics and physics oriented papers. Emphasis is on rapid publication of timely manuscripts. A goal is to provide a focal point of quality engineering-oriented papers in the electro-optics field not found in other rapid-publication journals.