Cylindrical optical intelligent antenna for 360-degree moving of FSO (free space optical communication) system in approximate plane

Abstract

The invention discloses a cylindrical optical intelligent antenna for 360-degree moving of an FSO (free space optical communication) system in an approximate plane. A plurality of laser receiving and transmitting arrays are disposed on a cylindrical carrier. Each array is composed of a plurality of laser receiving and transmitting units. The antenna can rotate horizontally to achieve continuity of a communication space. A communication protocol is designed to provide temporal continuity for upper layer users. On the basis of numbering the transmitting units, 360 degree acquisition, pointing and tracking of fast mobile laser communication in the approximate plane can be achieved through antenna beam control algorithm based on exchanging of the numbering information of communicating parties. Each laser receiving and transmitting unit is correlated with a laser switch array and is controlled by the laser switch array. One or a plurality of laser beam directions can be changed by controlling on and off of the laser switch array, and accordingly acquisition, pointing and tracking (APT) in communication are achieved.

Description

technical field [0001] The invention belongs to the field of information communication, and in particular relates to a cylindrical optical smart antenna for a 360-degree mobile FSO system in a near plane. Background technique [0002] Wireless laser communication (FSO: Free Space Optical Communication), also known as free space optical communication, refers to a system that uses laser beams as carriers to directly perform two-way transmission of various services such as data, voice and video in space (atmosphere, space or seawater). technology. FSO system is mainly used in inter-satellite, inter-satellite, between deep space spacecraft and satellite or ground, between satellite and flying body (such as aircraft, high-speed aircraft, etc.), between flying body and ground, between ground (water surface) Inter-laser communication, etc. In addition, laser communication between flying objects or ground and underwater targets is also included. [0003] FSO has a series of advan...

AI Technical Summary

Problems solved by technology

[0011] Due to the use of LEDs instead of high-power lasers, the communication distance is short (the designed maximum distance is about 600m in good weather), and it is not suitable for mobile FSO systems for outdoor use; the LED is placed in the center of the photodetector (PD: photodiode) , not only will increase the difficulty of device fabrication, but also the detection blind zone at the center of the PD will affect its detection capability

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