Analysis of different sub-carrier allocation of M-ary QAM-OFDM downlink in RoF system

Shao, Yufeng; Chen, Luo; Wang, Anrong; Zhao, Yun-jie; Long, Ying; Ji, Xingping

doi:10.1007/s11801-018-7142-x

Cited by 9 publications

(4 citation statements)

References 5 publications

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“…Free space optical (FSO) communication system can transmit high speed wireless optical signals, reduce the budget cost of the system without optical fibers, especially can be suitable for communication in mountainous area [ 2 ]. As we know, the radio over fiber (RoF) communication system has the superiority of large capacity information transmission of optical communication and seamless coverage of wireless access applications [ [3] , [4] , [5] , [6] ]. In some complex terrain areas, such as mountains and rivers, it is difficult to install communication cables underground, especially for optical fiber cables [ 7 ].…”

Section: Introductionmentioning

confidence: 99%

A novel dual polarization multiplexing RoF system integrating optical fiber and FSO channel with AMI downlink signals

Shao,

Tian,

Zhu

et al. 2024

Heliyon

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Section: Introductionmentioning

confidence: 99%

A novel dual polarization multiplexing RoF system integrating optical fiber and FSO channel with AMI downlink signals

Shao,

Tian,

Zhu

et al. 2024

Heliyon

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“…In addition, using rectangular functions as filters in OFDM systems results in large and slow-decaying side lobes, which easily cause interference between subcarriers [14]. In [15], we propose and design a RoF system for downlink 4/16/64QAM-OFDM signals. Although this scheme provides a flexible access method, it wastes bandwidth resources and leads to a certain degree of out-of-band leakage.…”

Section: Introductionmentioning

confidence: 99%

A Novel 4 × 1 MISO-VLC System with FBMC-OQAM Downlink Signals

Shao,

Li,

Wang

et al. 2024

Photonics

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A novel visible-light communication (VLC) system with 4 × 1 multi-input–single-output (MISO) channels is designed. In the system, the filter bank multicarrier (FBMC) and offset quadrature amplitude modulation (OQAM) techniques are used to generate downlink signals. The principles and implementation methods are proposed and analyzed, and the light intensity and received light power distribution of four LED emitters are discussed. The results demonstrate that it not only satisfies the requirements of indoor information access but also provides daily lighting. The used FBMC-OQAM signals exhibit better reception performance than orthogonal frequency division multiplexing (OFDM) signals. The system used has a lower bit error rate (BER) and larger access bandwidth compared to a 1 × 1 single-input–single-output (SISO) system. It has the potential for application advantages in future indoor VLC system applications.

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“…Recently, due to the emergence of many novel application scenarios such as virtual/augmented reality (VR/AR), artificial intelligence (AI), big data and cloud computing, there is an urgent need for higher-capacity access networks to meet people 's demand for communication bandwidth. High speed transmission, large bandwidth and flexible access has become the target direction of telecommunication's access system development [1,2]. The traditional passive optical network (PON) systems, such as Ethernet PON (EPON) and Gigabit PON (GPON) include the use of time division multiplexing (TDM) or wavelength division multiplexing (WDM) techniques, have certain limitations in bandwidth management, flexibility and scalability, and cannot meet the requirements of future network operators and end users [3,4].…”

Section: Introductionmentioning

confidence: 99%

Detection of high spectral efficiency 16/32QAM-OFDMA downlink signals using self mixing method and its application in PON

yang,

shao,

wang

et al. 2023

Third International Conference on Green Communication, Network, and Internet of Things (CNIoT 2023)

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A passive optical network (PON) fiber access system with two types of high spectral efficiency orthogonal frequency division multiple access (OFDMA) downlink signals is designed and demonstrated. In this scheme, 50Gbit/s 16/32 quadrature amplitude modulation (QAM) -OFDMA-PON downstream signals are transmitted over 20 km single-mode fiber (SMF) and detected using self mixing detection method, in which 256 subcarriers are divided into four sub-channels for multiple users access applications. The electrical frequency spectrums, optical spectrums, constellation diagrams, and bit error rate (BER) performance of the downstream signals are analyzed. The results show that under different received optical powers, we can select a certain sub-channel with the lowest BER, and the system also supports the dynamic selection of the appropriate signals type between 16QAM-OFDM and 32QAM-OFDM according to different users bandwidth requirements.

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Analysis of different sub-carrier allocation of M-ary QAM-OFDM downlink in RoF system

Cited by 9 publications

References 5 publications

A novel dual polarization multiplexing RoF system integrating optical fiber and FSO channel with AMI downlink signals

A novel dual polarization multiplexing RoF system integrating optical fiber and FSO channel with AMI downlink signals

A Novel 4 × 1 MISO-VLC System with FBMC-OQAM Downlink Signals

Detection of high spectral efficiency 16/32QAM-OFDMA downlink signals using self mixing method and its application in PON

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