Visible Light Communication

A wireless communication technology that transmits data through high-speed on-off flickering of LED luminaires, at a frequency above the range perceivable by the human eye, so that the illumination function is unaffected. In positioning applications, spatial position is inferred from received signal strength (RSS), angle of arrival, or time of flight of the optical signal. Its advantages are that no additional infrastructure is required, there is no electromagnetic interference, and physical isolation is good; its shortcomings are susceptibility to occlusion and sensitivity to illumination changes.