Method for improving wireless optical communication performance under high-current flowing water

Abstract

The invention provides a method for improving wireless optical communication performance under strong flowing water, which comprises the following steps of: respectively calculating flicker indexes and structural constants of a plane wave and a spherical wave under an aperture average effect under strong ocean turbulence; modulating an input signal of an underwater wireless optical communication system by adopting a DPSK modulation technology, and transmitting the modulated signal through a Gamma-Gamma distributed strong oceanic turbulence channel; receiving a signal by using an aperture receiving technology, and obtaining an average bit error rate analytical expression of the underwater wireless optical communication system under heterodyne differential phase shift keying modulation through a Whittaker function; and comparing and analyzing the average bit error rate under different influence factors through MATLAB software by utilizing the obtained average bit error rate analytical expression. The method has the advantages that the rule of improving the performance of the UWOC system is well disclosed, and the method can be used for designing the UWOC system with more excellent performance, namely improving the performance of the UWOC system.

Description

technical field [0001] The present invention relates to the technical field of underwater wireless optical communication, and specifically relates to a method for performing average bit error rate performance of a UOWC system (that is, an underwater wireless optical communication system) by using DPSK modulation and aperture average receiving mode in a strong ocean turbulence channel. Theoretical and simulation studies to explore ways to improve the performance of UOWC systems. Background technique [0002] Underwater wireless optical communication system (UWOC) is a new line-of-sight transmission communication technology that uses light emitting diodes (LEDs) and laser diodes (laser diodes, LDs) as light sources, and uses seawater as the transmission medium to achieve two-way communication. The UOWC system has the advantages of low blue light / green light window absorption, low delay, wide bandwidth, high security, low cost, and easy installation. It is used in commercial ma...

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Problems solved by technology

[0006] The current problem is that under the condition of strong ocean turbulence, the effect of aperture averaging on the bit error rate performance of UOWC system has not been reported yet.

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