Code Design for Flicker Mitigation in Visible Light Communications Using Finite State Machines
| Autor: | Mohamed Abdallah, Carlos E. Mejia, Costas N. Georghiades, Yazan H. Al-Badarneh |
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| Rok vydání: | 2017 |
| Předmět: |
Computer science
Flicker Word error rate Visible light communication 020206 networking & telecommunications 02 engineering and technology Code rate Viterbi algorithm Coding gain symbols.namesake 020210 optoelectronics & photonics 0202 electrical engineering electronic engineering information engineering Electronic engineering Bit error rate symbols Algorithm design Electrical and Electronic Engineering |
| Zdroj: | IEEE Transactions on Communications. 65:2091-2100 |
| ISSN: | 0090-6778 |
| DOI: | 10.1109/tcomm.2017.2657518 |
| Popis: | The IEEE 802.15.7 standard for visible light communication (VLC) includes the use of run-length-limited codes to mitigate modulation-induced flickering and the further use of coding to improve bit error rate performance. In this paper, we introduce algorithms to design codes using finite-state machines, which provide simultaneously a coding gain while also mitigating flicker. The codes have the additional advantage of being optimally soft-decision decodable using the Viterbi algorithm. To compare the flicker mitigation performance of different codes, we further introduce a mathematical measure of flicker based on the power spectrum of the transmitted signals. We discuss tradeoffs between flicker mitigation, code rate, and coding gain, design several codes, and compare their error rate and flicker mitigation performance to some codes in the VLC standard. |
| Databáze: | OpenAIRE |
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