Coherent Transmission Systems in Optical Wireless Communication

A special issue of Photonics (ISSN 2304-6732). This special issue belongs to the section "Optical Communication and Network".

Deadline for manuscript submissions: 10 July 2024 | Viewed by 2499

Special Issue Editors


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Guest Editor
Key Laboratory for Information Science of Electromagnetic Waves (MoE), Fudan University, Shanghai 200433, China
Interests: visible light communication; modulation formats; optical communication; fiber transmission; machine learning

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Guest Editor
Key Laboratory for Information Science of Electromagnetic Waves (MoE), School of Information Science and Technology, Fudan University, Shanghai 200433, China
Interests: fiber transmission; millimeter wave communication; terahertz communication; neural network; optical transmission system

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Guest Editor
Department of Circuit and System, Peng Cheng Laboratory, Shenzhen 518000, China
Interests: optical communication; visible light communication; digital signal processing; machine learning

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Guest Editor
Center for Pervasive Communications, Purple Mountain Laboratories, Nanjing 211111, China
Interests: optical coherent communication and access; photonics millimeter wave terahertz communication

Special Issue Information

Dear Colleagues,

Coherent optical transmission systems are used to transmit high-speed data over long distances using optical fibers. These systems rely on the coherent detection of light signals, which allows for the recovery of both the amplitude and phase of the transmitted signal. This makes it possible to use advanced modulation formats, such as quadrature amplitude modulation (QAM), to increase the data rate of the system.

Thanks to its numerous advantages, coherent light detection has shown outstanding performance in fiber optic transmission systems. Recently, with the emergence of 6G technology, new requirements have arisen for the data transmission rates of optical wireless communication. As the demand for higher data transmission rates increases, the conventional intensity modulation direct detection system may not suffice, making the development of a coherent system an urgent necessity. To realize coherent transmission systems in optical wireless communication, novel modulation formats, transceiver devices, digital signal processing, and communication mechanisms should be developed in both directions.

The goal of this Special Issue is to address the difficulties and prospects of optical wireless communication with regard to coherent transmission systems, as well as their potential optical solutions, by examining possible development paths, obstacles, and frontier technologies. Additionally, the issue aims to provide a platform to present the latest innovations and research in coherent free space optics. Original research articles and reviews on recent processes and developments will be welcomed. Topics include but are not limited to the following:

  • Free space optics (FSO);
  • Optical wireless communication (OWC);
  • Visible light communication (VLC);
  • Optical modulator;
  • Optical detector;
  • New modulation format and technology;
  • Advanced DSP algorithm;
  • Machine-learning-based algorithm.

Dr. Jianyang Shi
Prof. Dr. Junwen Zhang
Dr. Hui Chen
Dr. Jiao Zhang
Guest Editors

Manuscript Submission Information

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Keywords

  • optical wireless communication
  • coherent transmission
  • frees space optics
  • visible light communication

Published Papers (2 papers)

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Research

20 pages, 8375 KiB  
Article
A Hybrid Millimeter-Wave and Free-Space-Optics Communication Architecture with Adaptive Diversity Combining and HARQ Techniques
by Yinjun Liu, Xiaochuan Tan, Junlian Jia, Boyu Dong, Changle Huang, Penghao Luo, Jianyang Shi, Nan Chi and Junwen Zhang
Photonics 2023, 10(12), 1320; https://doi.org/10.3390/photonics10121320 - 29 Nov 2023
Cited by 2 | Viewed by 963
Abstract
We propose and demonstrate a hybrid communication architecture that combines millimeter-wave (MMW) in the radio frequency (RF) domain and free-space-optics (FSO) technologies using adaptive combining and hybrid automatic repeat request (HARQ) techniques. At the receiving end, we employed joint signal processing with an [...] Read more.
We propose and demonstrate a hybrid communication architecture that combines millimeter-wave (MMW) in the radio frequency (RF) domain and free-space-optics (FSO) technologies using adaptive combining and hybrid automatic repeat request (HARQ) techniques. At the receiving end, we employed joint signal processing with an adaptive diversity combining technique (ADCT) based on a maximum ratio combining (MRC) algorithm. We derived closed-form expressions for the outage probability and throughput of the hybrid RF and FSO (RF/FSO) system, considering various characteristics of atmospheric turbulence in the FSO link. Experimental testing with 10-Gbaud quadrature phase shift keying (QPSK) data was conducted under different simulated atmospheric turbulence intensities, FSO and MMW speed-ratios, and forward error correction (FEC) overheads. Additionally, we validated improvements in terms of bit error ratio (BER), outage probability, and throughput performance. Full article
(This article belongs to the Special Issue Coherent Transmission Systems in Optical Wireless Communication)
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14 pages, 9207 KiB  
Article
Experimental Comparison of Carrier Phase Recovery Algorithms for Uniform and Probabilistically Shaped QAM in a 324.1 Gb/S Fiber-mm-Wave Integration System at W-Band
by Junhao Zhang, Jiao Zhang, Qingsong Wang, Jian Chen, Wei Luo, Shitong Xiang, Yuancheng Cai, Bingchang Hua, Mingzheng Lei, Yucong Zou, Liang Tian, Xingyu Chen and Min Zhu
Photonics 2023, 10(8), 927; https://doi.org/10.3390/photonics10080927 - 12 Aug 2023
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Abstract
We have experimentally implemented a photonics-aided large-capacity fiber-mm-wave wireless communication system employing a simple dual-polarized single-input single-output (SISO) wireless based on polarization multiplexing at the W-band. To compare the performance of different algorithms, 18G-baud, and 35G-baud 16-level quadrature-amplitude-modulation (16QAM), probabilistically shaped 16QAM (PS-16QAM), [...] Read more.
We have experimentally implemented a photonics-aided large-capacity fiber-mm-wave wireless communication system employing a simple dual-polarized single-input single-output (SISO) wireless based on polarization multiplexing at the W-band. To compare the performance of different algorithms, 18G-baud, and 35G-baud 16-level quadrature-amplitude-modulation (16QAM), probabilistically shaped 16QAM (PS-16QAM), 64QAM and PS-64QAM signal using different carrier phase recovery (CPR) algorithms are transmitted in the system. Moreover, we compare the Viterbi–Viterbi (VV), improved new algorithm based on VV (NVV), blind phase search (BPS), and two-stage BPS algorithms’ computational complexity to better compare different algorithms. Using the experiment result, we can demonstrate that the BPS algorithm is about half a magnitude better than the NVV algorithm for PS-QAM signals, while the NVV algorithm has the lowest computational complexity. Additionally, we also achieve error-free wireless transmission at a net data rate of 324.1 Gb/s with the bit error ratio (BER) below the forward-error correction (FEC) threshold of 1 × 10−2 assuming soft-decision forward-error correction (SD-FEC) when using the BPS algorithm. Full article
(This article belongs to the Special Issue Coherent Transmission Systems in Optical Wireless Communication)
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