Method and device for improving performance of wireless optical communication system

Abstract

The invention provides a method for improving the performance of a wireless optical communication system. The method comprises the following steps: establishing a transmitting end and a receiving endof a communication system, transmitting a plurality of groups of vortex light beams with different initial beam waist radiuses from the transmitting end to the receiving end, establishing a vortex beam orbital angular momentum model, obtaining a receiving probability transmitted from the transmitting end to the receiving end, establishing a change curve graph of the receiving probability changingalong with initial girdle radius, and taking the initial beam waist radius corresponding to the maximum value of the receiving probability in the change curve graph as the initial beam waist radius ofa transmitting beam of the communication system. Appropriate light beam parameters can be selected according to practical application, interference of the transmission distance on wireless optical communication is effectively reduced, the light beam parameters are reasonably and correctly selected, and the performance of the wireless optical communication is improved.

Description

technical field [0001] The invention relates to a method and a device for improving the performance of a communication system, in particular to a method and a device for improving the performance of a wireless optical communication system. Background technique [0002] Wireless optical communication is different from optical fiber communication. It is a communication method that uses laser as a carrier and the atmosphere as a transmission medium. It can realize point-to-point, point-to-many and many-to-many bidirectional transmission of data, voice, and images. Since its transmission medium is free space, there is no need to lay lines, and the communication method is more flexible and convenient. In addition, wireless optical communication also has the characteristics of no frequency application, strong confidentiality, large communication capacity, low cost, and easy maintenance. It can be widely used in emergency communication, local area network expansion, optical fiber ...

AI Technical Summary

Problems solved by technology

These phenomena will affect the transmission of light beams in the atmosphere, and ultimately reduce the performance of wireless optical communication

[0004] It is well known that as the communication distance increases, the beam is more and more affected by turbulence, and the communication performance decreases accordingly

Scientific researchers have proposed ways to reduce the loss of the beam by increasing the wavelength of the beam, increasing the receiving aperture, etc., but these methods are more complicated to operate, and cannot effectively reduce the impact of the transmission distance. Beam parameters

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