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2.38 Kbits/frame WDM transmission over a CVLC system with sampling reconstruction for SFO mitigation
Optics Express
|December 10, 2017
Summary
This study demonstrates a secure, cost-efficient camera-based visible light communication (CVLC) system using the rolling shutter effect (RSE). The novel wavelength division-multiplexing (WDM) approach achieves high data rates with low error rates.
Area of Science:
- Optical Communications
- Wireless Technology
- Signal Processing
Background:
- Visible light communication (VLC) offers a secure and cost-efficient alternative for data transmission.
- The rolling shutter effect (RSE) in mobile-phone cameras can be leveraged for data recovery in VLC systems.
- Wavelength division multiplexing (WDM) enhances data capacity in optical communication systems.
Purpose of the Study:
- To experimentally demonstrate a wavelength division-multiplexing (WDM) camera-based visible light communication (CVLC) system exploiting the rolling shutter effect (RSE).
- To propose and implement a low-complexity sampling reconstruction (SR) scheme to mitigate sampling frequency offset (SFO) effects.
- To evaluate the system's data rate and bit error rate (BER) performance.
Main Methods:
- Utilizing a commercial RGB-LED and a single mobile-phone camera for data modulation and recovery.
- Implementing a three-parallel-independent channel structure for WDM signal generation and reception.
- Applying a proposed low-complexity sampling reconstruction (SR) scheme to each channel to counteract SFO.
Main Results:
- Successful experimental demonstration of a WDM CVLC system exploiting RSE.
- Achieved a theoretical data rate of up to 2.38 Kbits/frame.
- Maintained a bit error rate (BER) lower than 3.8 × 10-3 with the SR scheme.
Conclusions:
- The proposed SR scheme effectively mitigates SFO in WDM CVLC systems.
- The demonstrated WDM CVLC system offers a viable solution for secure and high-speed data transmission.
- Camera-based visible light communication exploiting RSE presents a promising low-cost communication technology.
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