Chinese Optics Letters, 2021, 19 (4): 040601, Published Online: Feb. 22, 2021
Dimming control scheme based on hybrid LACO-SCFDM for visible light communications Download: 583次
dimming control single-carrier frequency-division multiplexing visible light communication spectral efficiency complexity
Abstract
This paper proposes a hybrid layered asymmetrically clipped optical (HLACO) single-carrier frequency-division multiplexing (SCFDM) scheme for dimmable visible light communication. It designs a signal structure that combines layered asymmetrically clipped optical (LACO)-SCFDM and negative LACO-SCFDM in proportion for improving the inherent weaknesses of orthogonal frequency-division multiplexing (OFDM)-based dimmable schemes and further enhancing the system performance. Compared to the HLACO-OFDM-based dimming scheme, it obtains a lower bit error ratio and enables efficient communication over broader dimming range. Its spectral efficiency realizes 2.875 bit·s-1·Hz-1 within the dimming range of 30%–70%, and the attainable average spectral efficiency gains exceed at least 19.21% compared to other traditional dimmable schemes.
Siqiao Li, Tiantian Zhang, Yaojun Qiao, Ji Zhou. Dimming control scheme based on hybrid LACO-SCFDM for visible light communications[J]. Chinese Optics Letters, 2021, 19(4): 040601.