Space Division Multiplexing Using High-Luminance Cell-Size Reduction Arrangement for Low-Luminance Smartphone Screen to Camera Uplink Communication

To simultaneously enhance data rate and physical layer security (PLS) for low-luminance smartphone screen to camera uplink communication, space division multiplexing using high-luminance cell-size reduction arrangement is numerically analyzed experimentally verified. The consists of a an indoor telephoto at long distance 3.5 meters. avoids the influence spatial inter-symbol interference (ISI) ambient light obtain stable screen. reduce luminance without decreasing pixel value, reduces only cell area while keeping spacing. In this study, two technical issues related are solved. First, numerical analysis experimental results show that more effective in reducing ISI low than conventional arrangement. Second, view point PLS enhancement wide angles, symbol error should be front high angles. A suitable enhancing angles