Tsinghua National Laboratory for Information Science and Technology(TNList) Department of Electronic Engineering Tsinghua University Beijing 100084 China;
Tsinghua National Laboratory for Information Science and Technology(TNList) Department of Electronic Engineering Tsinghua University Beijing 100084 China;
Tsinghua National Laboratory for Information Science and Technology(TNList) Department of Electronic Engineering Tsinghua University Beijing 100084 China;
Tsinghua National Laboratory for Information Science and Technology(TNList) Department of Electronic Engineering Tsinghua University Beijing 100084 China;
orthogonal frequency division multiplexing; intensity modulation with direct detection; optical wireless communications; visible light communications; absolute value operation;