Ambient LED Light Noise Reduction Using Adaptive Differential Equalization in Li-Fi Wireless Link
For Li-Fi wireless links based on a white light emitting diode, an adaptive differential equalization (ADE) technique that reduces various noises such as interference noise and shot one generated from ambient light sources is pro-posed. The ADE technique reduces noise by taking advantage of the fact...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-02-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/21/4/1060 |
| _version_ | 1797415181033144320 |
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| author | Yong-Yuk Won Sang Min Yoon Dongsun Seo |
| author_facet | Yong-Yuk Won Sang Min Yoon Dongsun Seo |
| author_sort | Yong-Yuk Won |
| collection | DOAJ |
| description | For Li-Fi wireless links based on a white light emitting diode, an adaptive differential equalization (ADE) technique that reduces various noises such as interference noise and shot one generated from ambient light sources is pro-posed. The ADE technique reduces noise by taking advantage of the fact that the derivative between adjacent sampling points of signal with digital waveform is very different from that of noise with the random analog waveform. Furthermore, a weighting function that reflects the Poisson characteristics of shot noise is applied to the ADE technique in order to maximize the reduction efficiency of ambient noise. The signal-to-noise ratio of input non-return-to-zero-on–off keying (NRZ-OOK) signal is improved by 7.5 dB at the first-generation forward error correction (FEC) threshold (the bit error rate (BER) of 8 × 10<sup>−5</sup>) using the optical wireless experimental link. In addition, it is confirmed that it is possible to maintain the transmission performance corresponding to the BER of 1 × 10<sup>−5</sup> by using the proposed ADE technique, even when the intensity of the ambient light source increases by 6 dB. |
| first_indexed | 2024-03-09T05:44:09Z |
| format | Article |
| id | doaj.art-6ca9590dc7324af986c6427b3ce956d8 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-03-09T05:44:09Z |
| publishDate | 2021-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-6ca9590dc7324af986c6427b3ce956d82023-12-03T12:22:16ZengMDPI AGSensors1424-82202021-02-01214106010.3390/s21041060Ambient LED Light Noise Reduction Using Adaptive Differential Equalization in Li-Fi Wireless LinkYong-Yuk Won0Sang Min Yoon1Dongsun Seo2Department of Electronic Engineering, Myongji University, 116 Myongji-ro, Cheoin-gu, Yongin 17058, KoreaCollege of Computer Science, Kookmin University, 77 Jeongneung-ro, Seongbuk-gu, Seoul 02707, KoreaDepartment of Electronic Engineering, Myongji University, 116 Myongji-ro, Cheoin-gu, Yongin 17058, KoreaFor Li-Fi wireless links based on a white light emitting diode, an adaptive differential equalization (ADE) technique that reduces various noises such as interference noise and shot one generated from ambient light sources is pro-posed. The ADE technique reduces noise by taking advantage of the fact that the derivative between adjacent sampling points of signal with digital waveform is very different from that of noise with the random analog waveform. Furthermore, a weighting function that reflects the Poisson characteristics of shot noise is applied to the ADE technique in order to maximize the reduction efficiency of ambient noise. The signal-to-noise ratio of input non-return-to-zero-on–off keying (NRZ-OOK) signal is improved by 7.5 dB at the first-generation forward error correction (FEC) threshold (the bit error rate (BER) of 8 × 10<sup>−5</sup>) using the optical wireless experimental link. In addition, it is confirmed that it is possible to maintain the transmission performance corresponding to the BER of 1 × 10<sup>−5</sup> by using the proposed ADE technique, even when the intensity of the ambient light source increases by 6 dB.https://www.mdpi.com/1424-8220/21/4/1060adaptive differential equalizationambient light noisedigital signal processinglight-emitting diodesLi-Fivisible light communication |
| spellingShingle | Yong-Yuk Won Sang Min Yoon Dongsun Seo Ambient LED Light Noise Reduction Using Adaptive Differential Equalization in Li-Fi Wireless Link Sensors adaptive differential equalization ambient light noise digital signal processing light-emitting diodes Li-Fi visible light communication |
| title | Ambient LED Light Noise Reduction Using Adaptive Differential Equalization in Li-Fi Wireless Link |
| title_full | Ambient LED Light Noise Reduction Using Adaptive Differential Equalization in Li-Fi Wireless Link |
| title_fullStr | Ambient LED Light Noise Reduction Using Adaptive Differential Equalization in Li-Fi Wireless Link |
| title_full_unstemmed | Ambient LED Light Noise Reduction Using Adaptive Differential Equalization in Li-Fi Wireless Link |
| title_short | Ambient LED Light Noise Reduction Using Adaptive Differential Equalization in Li-Fi Wireless Link |
| title_sort | ambient led light noise reduction using adaptive differential equalization in li fi wireless link |
| topic | adaptive differential equalization ambient light noise digital signal processing light-emitting diodes Li-Fi visible light communication |
| url | https://www.mdpi.com/1424-8220/21/4/1060 |
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