Dear Reader, * This is the dataset of the submitted paper (August, 2017): X. Zhang, Q. Wang, R. Zhang, S. Chen and L. Hanzo, "Performance Analysis of Layered ACO-OFDM". * Paper Abstract: Layered asymmetrically clipped optical orthogonal frequency division multiplexing (LACO-OFDM) has been proposed for improving the spectral efficiency of conventional asymmetrically clipped optical OFDM (ACO-OFDM). Multiple base layers that are orthogonal in the frequency domain are sequentially superimposed to form LACO-OFDM, where each superimposed layer fills the empty subcarriers left by the previous layer. As our contribution, the\deleted{ closed-form} bit error ratio (BER) considering the effect of thermal noise, clipping distortion, inter-layer interference and the bit rate difference between layers is analysed in this paper. Since the BER performance of LACO-OFDM is closely related to its peak-to-average power ratio (PAPR) distribution, we also provide the analytical expression of the PAPR distribution in this paper, which quantifies how the number of layers in LACO-OFDM reduces the PAPR. As a further advance, we propose a tone-injection aided PAPR reduction design for LACO-OFDM, which in turn improves the BER performance. Simulations are provided for verifying both the analytical BER performance and the PAPR distribution of LACO-OFDM. The results show that the expressions derived match well with the simulations. Furthermore, the PAPR reduction method proposed attains a 5 dB PAPR reduction at the $10^{-3}$ probability-point of the complementary cumulative distribution function (CCDF), as well as a better BER performance than the original LACO-OFDM scheme. * Acknowledgements: This work was supported in part by the Engineering and Physical Sciences Research Council under Project EP/N004558/1 and Project EP/N023862/1, in part by RAEng Industrial Fellowship, in part by the European Research Council’s Advanced Fellow Grant through the Beam-Me-Up Project, and in part by the Royal Society Wolfson Research Merit Award. L. Hanzo was supported by the European Research Council’s Senior Research Fellow Grant. The authors acknowledge the use of the IRIDIS High Performance Computing Facility, and associated support services at the University of Southampton, in the completion of this work. * This dataset contains the data used for producing Figures 5, 6, 7, 8, 9, 10 of the ACCEPTED paper "Performance Analysis of Layered ACO-OFDM". Each folder is named according to the figure's number and the dataset - of each figure - is stored in one or two .dat file in that folder. There are TWO different plot types: BER plots, PAPR plots. To regenerate the results please use the command "pdflatex Figure_Name.tex" (latest version of LaTeX, including the TikZ and pgfplots packages, should be installed.) Cheers! Xiaoyu "Colin" Zhang 25/08/2017