A new LED response model and its application to pre-equalization in VLC systems

Name: A new LED response model and its application to pre-equalization in VLC systems
Author: Kısacık, Rıfat, Yagan, M. Y., Uysal, Murat, Pusane, A. E., Yalcinkaya, A. D.

İsim	A new LED response model and its application to pre-equalization in VLC systems
Yazar	Kısacık, Rıfat, Yagan, M. Y., Uysal, Murat, Pusane, A. E., Yalcinkaya, A. D.
Basım Tarihi:	2021-09-01
Basım Yeri	- IEEE
Konu	LED response model, Phosphor white LED, Pre-equalization, Visible light communication
Tür	Süreli Yayın
Dil	İngilizce
Dijital	Evet
Yazma	Hayır
Kütüphane:	Özyeğin Üniversitesi
Demirbaş Numarası	1041-1135
Kayıt Numarası	3296379d-323b-4e63-a0d5-73f20b0fbd33
Lokasyon	Electrical & Electronics Engineering
Tarih	2021-09-01
Notlar	TÜBİTAK
Örnek Metin	With the growing interest in visible light communication (VLC), it is desired to transmit data at very high rates despite the LED's bandwidth becoming a bottleneck. The bandwidth of a white LED usually ranges between hundreds of kHz and a couple of MHz, limiting transmission rates dramatically in a VLC system. Successful design of an efficient equalizer for VLC systems heavily depends on the realistic modeling of LED's frequency response. In this letter, we first propose a new LED response model taking the parasitic effects appearing at higher frequencies into account. The proposed model provides better match with measurements of commercially available LEDs over a wide frequency range as compared to the existing models in the literature. Then, we design a digital equalizer in line with the proposed model and implement it as an offline digital system in Matlab. The designed equalizer yields an overall flat system response over a wide frequency range. As a demonstration, we present the measured eye diagrams and bit error rate performance results of the equalized VLC system with on-off keying modulation and demonstrate improvements in data rate in comparison to the LED bandwidth.
DOI	10.1109/LPT.2021.3100924
Cilt	33

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A new LED response model and its application to pre-equalization in VLC systems

Yazar Kısacık, Rıfat, Yagan, M. Y., Uysal, Murat, Pusane, A. E., Yalcinkaya, A. D.

Basım Tarihi 2021-09-01

Basım Yeri - IEEE

Konu LED response model, Phosphor white LED, Pre-equalization, Visible light communication

Tür Süreli Yayın

Dil İngilizce

Dijital Evet

Yazma Hayır

Kütüphane Özyeğin Üniversitesi

Demirbaş Numarası 1041-1135

Kayıt Numarası 3296379d-323b-4e63-a0d5-73f20b0fbd33

Lokasyon Electrical & Electronics Engineering

Tarih 2021-09-01

Notlar TÜBİTAK

Örnek Metin With the growing interest in visible light communication (VLC), it is desired to transmit data at very high rates despite the LED's bandwidth becoming a bottleneck. The bandwidth of a white LED usually ranges between hundreds of kHz and a couple of MHz, limiting transmission rates dramatically in a VLC system. Successful design of an efficient equalizer for VLC systems heavily depends on the realistic modeling of LED's frequency response. In this letter, we first propose a new LED response model taking the parasitic effects appearing at higher frequencies into account. The proposed model provides better match with measurements of commercially available LEDs over a wide frequency range as compared to the existing models in the literature. Then, we design a digital equalizer in line with the proposed model and implement it as an offline digital system in Matlab. The designed equalizer yields an overall flat system response over a wide frequency range. As a demonstration, we present the measured eye diagrams and bit error rate performance results of the equalized VLC system with on-off keying modulation and demonstrate improvements in data rate in comparison to the LED bandwidth.

DOI 10.1109/LPT.2021.3100924

Cilt 33