Real-Time 2.2-Gb/s Water-Air OFDM-OWC System With Low-Complexity Transmitter-Side DSP

Shao, Yingjie; Deng, Rui; He, Jing; Wu, Kaiquan; Chen, Lian-Kuan

doi:10.1109/jlt.2020.3001864

Cited by 43 publications

(9 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Apart from the conventional signal propagation route, where both the transmitter and receiver are submerged in the water, the water-to-air modality have been excessively studied in the literature due to its tremendous advantages [96]. However, due to the naturally challenging optical link arising from the dynamic wavy surface, dedicated testbeds have investigated wave mitigation techniques using beam tracking [97] and corrective advanced signal processing [98].…”

Section: Recent Advances In Testbed Studiesmentioning

confidence: 99%

Current Trend in Optical Internet of Underwater Things

et al. 2022

View full text Add to dashboard Cite

Our Earth is a "blue planet" that 70% of the surface is covered by the oceans, but most area of oceans remain largely unexplored. Besides supporting the Earth's ecosystem and moderating climate change, oceans are rich in economically relevant natural resources ready for harvesting, such as fishery, oil and gas, and mineral resources. Ocean observation and monitoring are therefore essential for environmental preservation and sea exploration. With the availability of advanced communication techniques, researchers began to look into distributed data acquisition and ocean interconnectivity, which engendered the concepts of intelligent ocean and the Internet-of-Underwater-Things (IoUT) framework. The framework is gaining traction since one could incorporate fiber sensing, acoustic, radio frequency, and optical wireless communication technologies to establish stable, broad-coverage, and massive ocean networks. The development of underwater internet beyond acoustic communication is still in its relative infancy, and therefore more aggregated research efforts from the related communities will be required to eventually achieve breakthroughs in comprehensive IoUT technologies. This review sheds light on the practical considerations and solutions to the challenges and robustness of the optical IoUT network in terms of channel characterization, turbulence studies, mobility, receiver optimization, and the application layer.

show abstract

Section: Recent Advances In Testbed Studiesmentioning

confidence: 99%

Current Trend in Optical Internet of Underwater Things

et al. 2022

View full text Add to dashboard Cite

show abstract

“…However, only the visuals of received images were presented as results rather than any analytical evaluation. Shao et al 28 present a video transmission over air and under water OFDM‐based OWC system. The metric of performance evaluation has been BER.…”

Section: Literature Survey and Contributionsmentioning

confidence: 99%

Quality assessment for terrestrial digital video broadcast over optical wireless communication‐passive optical network under moderately turbulent regime with spatial diversity

Gill

Singh

et al. 2022

Int J Communication

View full text Add to dashboard Cite

Summary The preceding decade has seen successful rollout of 5G and convergence of broadcast broadband and telecom sector. The near future bandwidth demands for services such as advanced immersive multimedia are even more challenging. This has led to advent of 6G. The access technologies need to provide virtually unlimited data rates to support majority of applications in 6G. The optical wireless communication (OWC) with its inherent advantages is a potential enabler in this scenario. However, phenomenon such as atmospheric turbulence poses a serious degradation to performance of such systems. For multimedia services, end user perception is the ultimate quality indicator. To ascertain this quality in quantitative terms, full reference quality metrics are employed for communication purposes. In this paper, digital video broadcasting terrestrial (DVB‐T) videos with varying complexities are transmitted over OWC‐passive optical network (PON) architecture. For performance enhancement 2 × 2 repetitive coding MIMO is employed with maximal ratio combining receiver. A total of 6 video quality assessment (VQA) metrics are evaluated for the system w.r.t channel parameter as Rytov variance. For all the VQA metrics, an enhancement in the performance is observed by using MIMO technique. This performance improvement is more prominent for more complex video as compared to less complex video. As for the limiting case BER of 10−3 gives a limiting link distance of 1350 m; however with VQA metrics, the limiting case distance is 1280 m. By the use of 2 × 2 MIMO techniques, this distance enhances by 20–25 m.

show abstract

“…A W2A laser communication system was realized in [17], which achieves a data rate of 44 Mb/s over a 2.3-m underwater and 3.5-m air link. Furthermore, different multi-carrier W2A laser communication systems were developed in [18] and [19] to alleviate the fading effect.…”

Section: Introductionmentioning

confidence: 99%

“…In real communication scenarios, wavy surface may randomly change the direction of light propagating into the air, which has not been addressed in [15] and [18]. The transmitter and receiver may fluctuate with the environments and not be perfectly aligned in practical W2A-OWC scenarios, which has not been addressed in [13], [15]- [19].…”

Section: Introductionmentioning

confidence: 99%

Preliminary Characterization of Coverage for Water-to-Air Visible Light Communication Through Wavy Water Surface

et al. 2021

View full text Add to dashboard Cite

In this paper, we establish a water-to-air (W2A) visible light communication (VLC) link using green light emitting diode (LED), and investigate the coverage characteristics of the designed W2A-VLC link under calm and wavy water conditions. By transmitting a high-frequency sinusoid signal, we extract the variation of link gain. Based on the received signals of an experimental W2A-VLC system, we obtain the real link gains at different receiver points and analyze the channel temporal properties in good link conditions (called link "on" state). It is seen that the mean channel gain under wavy water surface condition can be larger than that under calm water surface condition, especially when the transmitter and receiver are not perfectly aligned, due to the random spatial modulation effect of wavy water surface. Moreover, the "on" state duration and interval can be well fitted by a shifted exponential distribution and a shifted lognormal distribution, respectively. Bit error rate (BER) results reveal the effect of expanded link gain variation under wavy water surface condition. This work provides significant guidance for future works on the communication protocol design and related performance analysis.

show abstract

Real-Time 2.2-Gb/s Water-Air OFDM-OWC System With Low-Complexity Transmitter-Side DSP

Cited by 43 publications

References 29 publications

Current Trend in Optical Internet of Underwater Things

Current Trend in Optical Internet of Underwater Things

Quality assessment for terrestrial digital video broadcast over optical wireless communication‐passive optical network under moderately turbulent regime with spatial diversity

Preliminary Characterization of Coverage for Water-to-Air Visible Light Communication Through Wavy Water Surface

Contact Info

Product

Resources

About