Equalization of camera-based channel to mitigate uncertain sampling for optical camera communications
The asynchronous nature of optical camera communication makes uncertain sampling a fundamental and inevitable problem that degrades data transmission performance. Based on a parametric model describing the exposure effect of the camera-based channel as the source of uncertain sampling, a simple chan...
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Veröffentlicht in: | Optics express 2022-12, Vol.30 (26), p.47776-47791 |
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Hauptverfasser: | , , |
Format: | Artikel |
Sprache: | eng |
Online-Zugang: | Volltext |
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Zusammenfassung: | The asynchronous nature of optical camera communication makes uncertain sampling a fundamental and inevitable problem that degrades data transmission performance. Based on a parametric model describing the exposure effect of the camera-based channel as the source of uncertain sampling, a simple channel equalization method and implementation are proposed in this paper to mitigate the uncertain sampling by exploiting the space-time relationship of the transmitted spatial delayed pulse width modulation waveform on multiple light sources. In addition, the rate of equalization error caused by under-sampling and over-exposure is analyzed for different duty cycles and exposure times. Numerical simulation and experiment results demonstrate the availability and reliability in mitigating uncertain sampling by the proposed channel equalization. |
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ISSN: | 1094-4087 1094-4087 |
DOI: | 10.1364/OE.474140 |