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Implementation of an optical wireless communication system deploying a novel post‐equalization circuit for indoor application
Author(s) -
Thao Adam,
Kang Xinwei,
Lee GhangHo
Publication year - 2021
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.32556
Subject(s) - equalization (audio) , optical wireless , visible light communication , bit error rate , on off keying , transmission (telecommunications) , electronic engineering , keying , amplitude shift keying , wireless , computer science , communications system , data transmission , free space optical communication , optical communication , telecommunications , engineering , electrical engineering , phase shift keying , channel (broadcasting) , computer hardware , light emitting diode
This paper experimentally demonstrates an optical wireless communication (OWC) system with commercially available LED and PD for lighting purpose by optimizing the performance of the OWC system with a newly proposed post‐equalization circuit. We used non‐return to zero (NRZ) on‐off keying (OOK) modulating at 622 Mbps with operating carrier wavelength of 636 nm, which corresponds to red visible light. The free space transmission length of the system was set at 50 cm and the LED emitted 9.1 lx. Different post‐equalization gains were tested to optimize proposed post‐equalization circuit by using the frequency response characteristics at different modulating frequencies and the bit‐error rate (BER) of the OWC system. For the optimized case, we were able to achieve error‐free transmission at 622 Mbps and a maximum achievable data rate of 636.6 Mbps with a BER of 9.9 × 10 −6 .