Method of pilot light offset compensation in optical wireless communication systems

A method carried out by an optical receiver comprising the steps of:

• detecting, by a photo detector of the optical receiver, a data beam sent by an optical transmitter;
• emitting pilot light, by at least two pilot light sources of the optical receiver, to assist a beam alignment procedure carried out by the optical transmitter;
• wherein the at least two pilot light sources are placed on different sides of the photo detector;
• determining, by a controller of the optical receiver, for each one of the at least two pilot light sources an individual pilot light intensity based on a received beam strength of the data beam detected by the photo detector, and controlling each one of the at least two pilot light sources to emit pilot light according to the determined corresponding individual pilot light intensity, such that the center of gravity of the combined pilot light intensities of the at least two pilot light sources provides an indication to the optical transmitter about a desired direction of movement of the data beam.