Net 5.75 Gbps/2 m Single-Pixel Blue Min LED Based Underwater Wireless Communication System Enabled by Partial Pre-Emphasis and Nonlinear Pre-Distortion

Article Optics

Net 4 Gb/s underwater optical wireless communication system over 2 m using a single-pixel GaN-based blue mini-LED and linear equalization

Xueyang Li et al.

Summary: This study fabricates and characterizes high-bandwidth GaN-based mini-LEDs on c-sapphire substrates, which show excellent performance for underwater optical communication.

OPTICS LETTERS (2022)

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Article Computer Science, Information Systems

Experimental Demonstration of 55-m/2-Gbps Underwater Wireless Optical Communication Using SiPM Diversity Reception and Nonlinear Decision-Feedback Equalizer

Xiaojian Hong et al.

Summary: In this paper, a 55m/2 Gbps underwater wireless optical communication (UWOC) system is proposed and experimentally demonstrated using silicon photomultiplier (SiPM) diversity reception and nonlinear decision-feedback equalizer (NDFE). The system mitigates the dead-time induced nonlinear distortion of SiPM-based UWOC and achieves significant performance improvement under different turbidity waters.

IEEE ACCESS (2022)

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Article Engineering, Electrical & Electronic

128 GSa/s SiGe DAC Implementation Enabling 1.52 Tb/s Single Carrier Transmission

Fred Buchali et al.

Summary: A new 128 GSa/s SiGe DAC with 8-bit resolution and 24 GHz bandwidth was developed and tested in coherent optical transmission. With constellation shaped modulation and polarization multiplexing, net bit rates of up to 1.55 Tb/s were achieved for direct transmission and 1.52 Tb/s for a typical DCI distance of 80 km.

JOURNAL OF LIGHTWAVE TECHNOLOGY (2021)

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Article Engineering, Electrical & Electronic

Compensating Dynamic Nonlinearities in LED Photon Emission to Enhance Optical Wireless Communication

Shokoufeh Mardanikorani et al.

Summary: This study translates non-linear differential equations of LEDs into a discrete-time model with delay taps and non-linear coefficients, proposing a simplified compensation circuit for non-linear dynamic LED distortion. The non-linear equalizer based on the LED model effectively widens the eye diagram, reduces error rates, and allows for larger constellations in communication systems. Parameter estimation can lead the equalizer to converge to appropriate compensation settings in the MMSE sense, showing the capability to increase bit rates and improve performance on noisy channels.

IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY (2021)

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Article Engineering, Electrical & Electronic

A 75-Mb/s RGB PAM-4 Visible Light Communication Transceiver System With Pre- and Post-Equalization

Li Wang et al.

Summary: A compact PAM-4 VLC transceiver system using a white LED as the light source with pre- and post-equalization is proposed to improve data rate by eliminating signal interference and distortion caused by LED limitations.

JOURNAL OF LIGHTWAVE TECHNOLOGY (2021)

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Article Engineering, Electrical & Electronic