Regular icosahedrons-based omni-directional optical intelligent antenna for FSO system and communication method

Abstract

The invention discloses a regular icosahedrons-based optical intelligent antenna, which adopts the structure that each face of the regular icosahedrons serves as a receiving unit and is provided with a plurality of laser transmitting units in ordered structure, the receiving units of the antenna in the structure adopt such a manner that receiving and transmitting occur at the same time, all the receiving-transmitting units of a laser transmit-receive array are correlated with and controlled by an optical switch array, and the pointing of one or more than one laser beams can be changed through the on / off of the optical switch array, so that functions of acquisition, pointing and tracking (APT) in the communication of the antenna are realized. According to the invention, the transmitting units can be switched according to the motion states of the two parties in communication, the pointing and tracking speed for the laser beams is quicker, and the defects of a mechanical method, such as large inertia and low speed in rotating the antenna, can be effectively overcome. Moreover, the omni-directional spatial and accurate acquisition, pointing and tracking functions are realized in a free space optical communication (FSO) system which adopts a fast point-point movement manner.

Description

technical field [0001] The invention belongs to the field of information communication, and in particular relates to an icosahedral omnidirectional optical smart antenna suitable for a mobile FSO system. Background technique [0002] Free Space Optical Communication (FSO: Free Space Optical Communication), also known as wireless laser communication, uses infrared laser beams as a carrier and free space as a medium to achieve high-speed communication between sites. The beam width of FSO is very small (several milliradians or even microradians), and infrared light is invisible, so it is safe and concealed. The use of wireless laser links to form a network has high reliability, and its flexibility is similar to that of general radio communication systems, which is convenient for erection, opening and withdrawal. Using automatic tracking and aiming technology, it can realize communication in motion. Therefore, FSO not only inherits the characteristics of high-capacity optical ...

AI Technical Summary

Problems solved by technology

[0009] 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 making the device, but also the detection blind area of ​​the PD center point will also affect its detection ability

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