Double GG composite channel base multi-hop-FSO bit error rate calculation method considering influence of different beam effects

Abstract

The invention discloses a Double GG composite channel base multi-hop-FSO bit error rate calculation method considering influence of different beam effects. The method comprises the following steps: 1)based on Double GG turbulence distribution, considering the influence of a point error and path loss, establishing a transmission model suitable for a multi-hop-FSO system; and on the basis, deducinga system probability density function and a cumulative distribution function under the joint action of the Double GG turbulence, the path loss and the point error; 2) obtaining a closed system bit error rate expression by using the Gaussian Laguerre polynomial, and performing simulation verification through a Monte Carlo method; and 3) considering the influence of different beams, substituting ahop count, normalized jitter, a normalized beam width and a weather condition parameter into a end-to-end closed average bit error rate expression of the multi-hop-FSO system to obtain the influence of the parameter on the performance of the multi-hop FSO system.

Description

technical field The invention belongs to the technical field of wireless optical communication, and specifically relates to a method for performing end-to-end ABER performance by adopting a decoding and forwarding protocol (DF) and IM / DD detection under the influence of point error and path loss and considering the influence of different beams. Theoretical and simulation studies of Double GG composite channel-based multi-hop-FSO system bit error rate calculation method. Background technique Free-space optical communication (FSO Free-space Optical Communication), also known as WOC Wireless Optical Communication, is a new line-of-sight transmission communication technology that uses laser as the carrier and the atmosphere as the transmission medium to achieve two-way communication. It is considered to be one of the most promising wireless communication technologies because of its wide frequency range, low cost, no need for spectrum resource license, no electromagnetic interfer...

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Problems solved by technology

The current problem is that the research on the bit error rate of the multi-hop-FSO system based on the Double GG compound turbulent channel model has not been reported; in addition, the analysis of the influence of different transmission beams (spherical wave and plane wave) on the performance of the multi-hop system has not been reported yet. See the report

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