scholarly journals Subtraction dual‐wavelength for enhanced transmission performance of free‐space optical communication over turbulence effect

2021 ◽  
Author(s):  
A. R. Kram ◽  
S. A. Kwang Thai ◽  
K. F. Tamrin ◽  
S. K. Sahari
Keyword(s):  
Optical Communication ◽  
Free Space ◽  
Dual Wavelength ◽  
Free Space Optical Communication ◽  
Free Space Optical ◽  
Transmission Performance ◽  
Enhanced Transmission ◽  
Space Optical Communication ◽  
Turbulence Effect

Improve the Bit Error Rate Performance of Free Space Optical Communication due to Atmospheric Turbulence Effect through the Robust Modulation

2014 ◽  
Vol 699 ◽  
pp. 942-947 ◽  
Author(s):  
A.K. Rahman ◽  
S.A. Aljunid ◽  
M.S. Anuar ◽  
H.A. Fadhil
Keyword(s):  
Atmospheric Turbulence ◽  
Optical Communication ◽  
Bit Error Rate ◽  
Error Rate ◽  
Free Space ◽  
Scintillation Index ◽  
Free Space Optical Communication ◽  
Free Space Optical ◽  
Space Optical Communication ◽  
Turbulence Effect

This paper focus on improvement bit error rate (BER) performance due to atmospheric turbulence effect in free space optical communication (FSOC) using new modulation technique that is dual diffuser modulation (DDM) technique. This technique uses two transmitter and differential mode detection at the receiver. The combination of dual diffuser with differential detection mode at receiver produce the superior modulation against the turbulence especially reducing the scintillation index, overcome the signal detection with fix zero threshold and improve the power received. These three element factors are important in order to improve the overall performance of free space optical system. The analysis result shows that under strong turbulence condition, the BER can improve 42 percent in term of FSO distance propagation.

Simulation modeling of free space optical communication system

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Ajay Sharma ◽  
Rajinder Singh Kaler
Keyword(s):  
Optical Communication ◽  
Free Space ◽  
Simulation Modeling ◽  
Additive White Gaussian Noise ◽  
Wireless Channel ◽  
Free Space Optical Communication ◽  
Optical Wireless ◽  
Free Space Optical ◽  
Wireless Signal ◽  
Space Optical Communication

Abstract The optical wireless communication has been designed by developing a model with the support of MATLAB simulator using Simulink where channel considered to be a free space. In this model, Additive White Gaussian Noise (AWGN) channel has used to analyze bit error rate (BER) and power loss of optical wireless signal at receiver. The consequence due to turbulence in atmosphere of free space on transmitted signal has examined. The BER and signal power have extremely ruined on rigorous atmospheric unstable condition even for a short distance in an optical wireless channel. The BER of less than 10−3 has been achieved for free space optical communication considered to be an excellent BER for FSO.

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