Increasing symbol rate by symbol decision based on spatial luminance distribution for rolling-shutter optical camera communication

Abstract

In rolling-shutter (RS) optical camera communication (OCC), as the ratio of the exposure time to the symbol length increases, it becomes difficult to achieve error-free transmission due to inter-symbol interference. In this study, to increase the symbol rate, symbol decision based on spatial luminance distribution is adapted for RS OCC. When the symbol rate increases and the ratio is close to 1, it is difficult to achieve error-free transmission by conventional symbol decision based on pixel value. However, even when the ratio increases up to 1, error-free transmission is achieved by the symbol decision based on spatial luminance distribution.