Research on Hemispherical Receiver for Indoor MIMO Visible Light Communication

In order to further improve the overall performance of the indoor multiple-input-multiple-output-visible-light-communication (MIMO-VLC) system, we use a hemispherical angle diversity receiver (ADR) to study and analyze the signal-interference-and-noise-ratio (SINR) distribution and area spectral efficiency (ASE) of the ADR at different tilt angles with random rotation. Through the optimization analysis of the tilt angle, we get the optimal tilt angle $\varphi_{ADR}=25^{\circ}$ By applying the optimized ADR, the SINR of the inclined ADR is 5dB higher than that of the horizontal ADR. And from the ASE curves, the results show that the indoor none-line-sight (NLOS) link has a certain impact on the performance of an indoor MIMO-VLC system.