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Optical camera communication (OCC) using a laser-diode coupled optical-diffusing fiber (ODF) and rolling shutter

Deng-Cheng Tsai, Yun-Han Chang, Chi-Wai Chow

|October 12, 2022

Summary

This summary is machine-generated.

We developed a novel optical-camera-communication system using a thin optical-diffusing-fiber transmitter. A new neural network algorithm decodes high data rates from this compact transmitter, enabling efficient optical data transmission.

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Area of Science:

Optoelectronics
Optical Communications
Machine Learning

Background:

Optical-camera-communication (OCC) systems offer wireless data transmission.
Optical-diffusing-fibers (ODFs) are compact light sources suitable for embedded applications.
Decoding high-speed data from thin ODFs using rolling-shutter cameras presents significant challenges.

Purpose of the Study:

To demonstrate a novel OCC system employing a laser-diode coupled ODF transmitter and a rolling-shutter camera receiver.
To propose and validate a new algorithm for decoding rolling-shutter patterns from thin ODF transmitters.
To analyze the theoretical maximum transmission angle for ODF transmitters.

Main Methods:

Implementation of an optical-camera-communication system with a laser-diode coupled ODF transmitter and a rolling-shutter image sensor receiver.
Development and experimental demonstration of a pixel-row-per-bit based neural-network (PPB-NN) algorithm for decoding rolling-shutter patterns.
Theoretical analysis of the maximum ODF transmitter angle.

Main Results:

The proposed PPB-NN algorithm successfully decoded rolling-shutter patterns from a thin ODF transmitter.
The system achieved a data rate of 3,300 bit/s with a pre-forward error correction (FEC) Bit Error Rate (BER) at a transmission distance of 35 cm.
Experimental results for the ODF transmitter angle aligned with theoretical predictions.

Conclusions:

The developed PPB-NN algorithm effectively decodes high data rates from compact ODF transmitters in OCC systems.
This approach enables reliable optical wireless communication using unconventional, small-form-factor light sources.
The findings validate the feasibility of using ODFs in practical OCC applications and provide theoretical insights into their angular characteristics.