A Joint Coded-Modulation Scheme of Median Partition Color-Shift Keying for Visible Light Communications

In this study, a new class of median partition color-shift keying (MPCSK) constellation is developed for visible light communication that is based on the median partition triangle and allocates the symmetrical symbol on the medians. We study the MPCSK constellation expanding from a two-dimensional (2D) triangle intensity plane to three-dimensional (3D) multiple intensity planes under the target color constraint. Furthermore, we design the optimal problem of the 3D MPCSK constellation to improve the error performance. Finally, a joint coded-modulation (JCM) scheme, which is based on the MPCSK constellation in 3D intensity space and flnite-state machines to obtain a high coding gain, is proposed. Our simulation results indicate that the proposed JCM scheme performs better than the standard CSK and other existing methods under the constraint of the target color.