Enhancing performance of next generation FSO communication systems using soft computing-based predictions

Abstract

The deterioration and deformation of a free-space optical beam wave-front as it propagates through the atmosphere can reduce the link availability and may introduce burst errors thus degrading the performance of the system. We investigate the suitability of utilizing soft-computing (SC) based tools for improving performance of free-space optical (FSO) communications systems. The SC based tools are used for the prediction of key parameters of a FSO communications system. Measured data collected from an experimental FSO communication system is used as training and testing data for a proposed multi-layer neural network predictor (MNNP) used to predict future parameter values. The predicted parameters are essential for reducing transmission errors by improving the antenna's accuracy of tracking data beams. This is particularly essential for periods considered to be of strong atmospheric turbulence. The parameter values predicted using the proposed tool show acceptable conformity with original measurements.

A novel receiving system based on optical taper applied to wireless optical communication

“…The deviation of the focus spot from the principal axis causes the misalignment relative to detecting region which results in the main loss [6][7][8][9] . If the focus spot is out of the small detecting area, the communication system cannot receive the light.…”

BER of Gaussian beam propagation in non-Kolmogorov turbulent atmosphere on slant path

“…It can be applied to on horizontal sight path, Earth-space slant path, and space-space path. The main factor to limit the performance of a FSO communication system is atmospheric turbulence [1] . The effects of atmospheric turbulence on laser beam propagation, such as beam spread, wander, and irradiance fluctuation (scintillation) are taken into account in the laser system operating in atmosphere.…”

Beam reception and data transmission performance analysis of optical taper used in a mobile wireless optical communication

“…Wireless optical communication has been developed many years and has lots of advantages [1][2][3][4][5], such as high bandwidth, fast setup, high data rate, license free and no cables required to be laid into the ground, etc. So it is considered to be an attractive option for the rapid provisioning of multi-gigabit data per second links.…”