Title :
A Robust CDMA VLC System Against Front-End Nonlinearity
Author :
Qian, H. ; Dai, S.C. ; Zhao, S. ; Cai, S.Z. ; Zhang, H.
Author_Institution :
Shanghai Res. Center for Wireless Commun., Shanghai Inst. of Microsyst. & Inf. Technol., Shanghai, China
Abstract :
The nonlinearity of a light-emitting diode (LED) limits the system performance of a visible light communications (VLC) system. Many nonlinearity mitigation methods have been studied. Recent technology advances in the micro-LED array have provided a simple alternative to deal with the system nonlinearity. In this paper, we study the approach of providing multiple access for the VLC system with the micro-LED array. A code-division multiple-access (CDMA) scheme that enables multiple access with variable data rate is proposed. In addition, the proposed system architecture is immune to the nonlinearity of the micro-LED array, thus providing optimal system performance. Simulations and laboratory experiments show the robustness and consistency of the proposed scheme.
Keywords :
code division multiple access; integrated optoelectronics; light emitting diodes; optical communication; code-division multiple-access; front-end nonlinearity; light emitting diode; micro-LED array; nonlinearity mitigation methods; robust CDMA VLC system; visible light communications; Arrays; Light emitting diodes; Modulation; Multiaccess communication; Nonlinear distortion; Receivers; Robustness; Code division multiple access (CDMA); Visible light communications (VLC); code-division multiple access (CDMA); micro-LED array; nonlinearity;
Journal_Title :
Photonics Journal, IEEE
DOI :
10.1109/JPHOT.2015.2472287
