“…Although the optical bandwidth for VLC is around 400THz, achieving a high data rate in a VLC system is challenging due to the low switching speed of off-the-shelf LED, which is typically several MHz [2] . Therefore, it is essential to employ more spectral efficient techniques such as Multiple input and multiple output (MIMO) and Orthogonal frequency division multiplexing (OFDM) to achieve high data rates [3,4] . Meanwhile, in order to provide sufficient illumination, light installations are typically equipped with multiple LEDs.…”