Overview of Vehicle Optical Wireless Communications

Mei, Hongye; Ding, Jupeng; Zheng, Jiong; Chen, Xifeng; Liu, Wenwen

doi:10.1109/access.2020.3024854

Cited by 14 publications

(3 citation statements)

References 118 publications

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“…For instance, several m and the corresponding T are listed in Table 2. It could be found that the LGABO-OFDM system with m = (2,4,8) has the lowest BER among the listed 7…”

Section: Volume mentioning

confidence: 99%

“…O PTICAL wireless communication (OWC) is attracting increasing interests in both industry and academia on its wide unlicensed bandwidth, high data rates and low latency, which is capable to meet the requirements for sixth-generation (6G) mobile communication networks [1]. Orthogonal frequency division multiplexing (OFDM) highly succeeded in radio frequency (RF) communications is also considered in OWC systems with the advantages of high spectral efficiency and capacity for resisting inter symbol interference (ISI) [2], [3]. However, most OWC systems typically adopt intensity modulation with direct detection (IM/DD) and limit the transmitted signals to be real-valued and nonnegative [4], therefore cannot directly adopt the OFDM schemes in RF systems.…”

Section: Introductionmentioning

confidence: 99%

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Layered Generalized Adaptively Biased Optical OFDM for IM/DD OWC Systems

Geng,

Tang,

Dong

2024

IEEE Open J. Commun. Soc.

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Due to the high spectral efficiency and robustness against inter-symbol interference (ISI), orthogonal frequency division multiplexing (OFDM) is attracting increasing attention in sixth-generation (6G) optical wireless communication (OWC) systems. In this paper, based on generalized adaptively biased optical OFDM (GABO-OFDM), we propose a novel power and spectrally efficient scheme of layered GABO-OFDM (LGABO-OFDM). The subcarriers in LGABO-OFDM are divided into several layers and conveyed simultaneously. Each layer employs GABO-OFDM which adds an adaptive bias to generate nonnegative signals. The added bias is orthogonal to the occupied subcarriers in each layer, therefore the transmitted information can be recovered iteratively at the receiver side. Theoretical derivation demonstrates that LGABO-OFDM is more spectrally efficient than traditional asymmetrically clipped optical OFDM (ACO-OFDM) and hybrid ACO-OFDM (HACO-OFDM). In order to optimize the power efficiency and reduce bit error rate (BER), we novelly propose an optical power allocation method and the principle of subcarrier allocation of LGABO-OFDM after analyzing the statistical properties of the adaptive bias. Numerical results further suggest that the proposed LGABO-OFDM has lower BER and peak-to-average power ratio (PAPR) than its conventional counterparts, which demonstrates its high power efficiency and capability of resisting the nonlinear distortion.INDEX TERMS Optical wireless communication (OWC), orthogonal frequency division multiplexing (OFDM), optical power allocation, power efficiency

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“…For instance, several m and the corresponding T are listed in Table 2. It could be found that the LGABO-OFDM system with m = (2,4,8) has the lowest BER among the listed 7…”

Section: Volume mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Layered Generalized Adaptively Biased Optical OFDM for IM/DD OWC Systems

Geng,

Tang,

Dong

2024

IEEE Open J. Commun. Soc.

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“…where I is the received optical intensity, and ⟨.⟩ denotes the ensemble average. Next, the multipath effect is a challenge faced in many applications of OWC including indoor, communication between unmanned aerial vehicles (UAV) and ground station and UOWC [38]- [40]. Multipath propagation can be caused by light arriving at different times due to reflection off surfaces as well as particles in a medium.…”

Section: Owc Channel Effectsmentioning

confidence: 99%

3-D-Hierarchical Signalling for Resilient Optical Wireless Communication Systems

Guler,

Geldard,

Butler

et al. 2023

IEEE Open J. Commun. Soc.

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This paper presents a 3 dimensional (3D)-hierarchical modulation technique for optical wireless communication (OWC) systems in which high, medium and low priority data are encoded on the frequency, phase and amplitude of a subcarrier signal, respectively. The error performance of the 3Dhierarchical modulation is derived and evaluated under different channel conditions. A proof-of-concept experiment is then presented to demonstrate the feasibility of this approach. The results presented in this study show that encoding high and medium priority data on the frequency and phase of a subcarrier signal offers resilience against the deleterious effects of the OWC channel. The amplitude dimension of the subcarrier signal can then be utilised to further increase the system spectral efficiency if the channel conditions allow for it. INDEX TERMS Optical wireless communications (OWC), Underwater optical wireless communications (UOWC), Visible light communication (VLC), free-space optical communication, Modulation schemes, Signalling techniques for OWC

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A comprehensive survey on hybrid wireless networks: practical considerations, challenges, applications and research directions

Mohsan¹,

Hussain

2021

Opt Quant Electron

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Overview of Vehicle Optical Wireless Communications

Cited by 14 publications

References 118 publications

Layered Generalized Adaptively Biased Optical OFDM for IM/DD OWC Systems

Layered Generalized Adaptively Biased Optical OFDM for IM/DD OWC Systems

3-D-Hierarchical Signalling for Resilient Optical Wireless Communication Systems

A comprehensive survey on hybrid wireless networks: practical considerations, challenges, applications and research directions

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