TY - JOUR
T1 - Increasing the reach of visible light communication links through constant-envelope OFDM signals
AU - Camporez, Higor
AU - Costa, Wesley
AU - Pontes, Maria
AU - Segatto , Marcela
AU - Rocha, Helder
AU - Silva, Jair
AU - Hinrichs, Malte
AU - Paraskevopoulos, Anagnostis
AU - Jungnickel, Volker
AU - Freund, Ronald
PY - 2023/3/1
Y1 - 2023/3/1
N2 - The transmission of constant-envelope orthogonal frequency division multiplexing (CE-OFDM) signals, based on electrical phase modulation, was shown to improve the tolerance to noise and the nonlinearity introduced by light-emitting diodes (LEDs) in visible light communication (VLC) systems. This allows the application of larger signal amplitudes despite the LED-nonlinearities and, thus, data transmission over larger distances. The performance of a 9.51 Mb/s CE-OFDM based system, with 16-QAM subcarrier mapping in a bandwidth of 5 MHz, was compared to the efficiency of a conventional OFDM system. The error vector magnitude (EVM) was reduced from 17.5% to 10% (which is below the FEC limit), an improvement around 43%, when the CE-OFDM scheme was applied in the VLC link of 6 m. A good performance was achieved by the CE-OFDM based VLC system in a link of 8 m, when 4-QAM was used as subcarrier mapping.
AB - The transmission of constant-envelope orthogonal frequency division multiplexing (CE-OFDM) signals, based on electrical phase modulation, was shown to improve the tolerance to noise and the nonlinearity introduced by light-emitting diodes (LEDs) in visible light communication (VLC) systems. This allows the application of larger signal amplitudes despite the LED-nonlinearities and, thus, data transmission over larger distances. The performance of a 9.51 Mb/s CE-OFDM based system, with 16-QAM subcarrier mapping in a bandwidth of 5 MHz, was compared to the efficiency of a conventional OFDM system. The error vector magnitude (EVM) was reduced from 17.5% to 10% (which is below the FEC limit), an improvement around 43%, when the CE-OFDM scheme was applied in the VLC link of 6 m. A good performance was achieved by the CE-OFDM based VLC system in a link of 8 m, when 4-QAM was used as subcarrier mapping.
KW - optical communication
KW - optische communicatie
U2 - 10.1016/j.optcom.2022.129179
DO - 10.1016/j.optcom.2022.129179
M3 - Article
SN - 1873-0310
VL - 530
JO - Optics Communications
JF - Optics Communications
M1 - 129179
ER -