Positioning and Data Broadcasting Using Illumination Pattern Sequences Displayed by LED Arrays

Illumination of a scene with a time sequence of spatial light patterns enables clients within the scene to navigate, receive broadcast wireless data, or make subsequent space-division multiple access connections to a high bandwidth wireless system. We have developed dedicated binary pattern sequences, for use with arrays of light-emitting diodes (LEDs), which are projected on the area of interest. The LED arrays can be in either active matrix or matrix-addressable format. The properties of the different sequences are compared theoretically and experimentally, highlighting a tradeoff between position update rate and resilience against pixel cross-talk and interference.

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