Method for beam alignment in point-to-point optical wireless communication systems

Abstract

A transmitter () for use in an optical wireless communication system, the transmitter () comprising a main optical transmitter front end () configured to send data on a first frequency band to a remote receiver () for data communication; and send a beacon signal on a first frequency channel to the remote receiver (); a plurality of auxiliary optical transmitter front ends () configured to send beacon signals on the first frequency channel to the remote receiver (); wherein the beacon signals sent by the main () and the auxiliary optical transmitter front ends () are used to assist a beam alignment procedure between the main optical transmitter front end () and the remote receiver () for data communication; and a first controller () configured to generate individual beacon signals for the main and the plurality of auxiliary optical transmitter front ends according to a synchronous CDMA method, with each beacon signal comprising a unique identifier corresponding to the main and the plurality of auxiliary optical transmitter front ends respectively.