SNR and BER Performance Enhancement on FSO Induced by Atmospheric Turbulence Using Optical Spatial Filter

Ucuk Darusalam, - and Purnomo Sidi Priambodo, - and Eko Tjipto Rahardjo, - (2015) SNR and BER Performance Enhancement on FSO Induced by Atmospheric Turbulence Using Optical Spatial Filter. International Journal of Optics and Applications, 5 (3). pp. 51-57.

[img]
Preview
 Text
7. Ucuk Darusalam.pdf
Download (621kB) | Preview

Abstract

Abstract In order to enhance signal-to-noise ratio (SNR) and bit-error-rate (BER) performance on free-space optical (FSO) communications, an optical spatial filter (OSF) is implemented at focus spot of receiver lens. Conceptually, the OSF collects fluctuation of signal intensity that is caused by beam wander and spatial noise at focus spot within a narrow region. The confinement of signal intensity fluctuation in a narrow region that goes random arround the optical axis can minimizes reception of noise into photodetector (PD). It also brings an advantage for enhancing mean value of signal intensity. Hence, PD receives optimum signal power and noise can be minimized. Those noise suppression leads to enhancement SNR performance. It means the distribution of signal power is optimally produced by PD rather than noise. Hence, higher signal intensity and narrow noise bandwidth by the OSF minimize the error distribution that gives an advantage to decrease the order of BER. From the calculations and experiment show that the OSF enhances SNR and BER performance under influenced of turbulence media. In comparison to direct detection (DD) method, the OSF with pinhole of 20 μm and cone reflector of 1.5 mm produces best performance that 〈SNR〉 increases at 4.2 dB and 〈BER〉 decreases at 10-12. Keywords FSO, Atmospheric turbulence, Spatial noise, Beam wander, Spatial filter, Cone reflector, Pinhole

Item Type: Article
Subjects: T Technology > T Technology (General)
Divisions: Artikel > Informatika dan Sistem Informasi
Depositing User: BPSI Unas
Date Deposited: 20 Aug 2017 00:46
Last Modified: 20 Aug 2017 00:46
URI: http://repository.unas.ac.id/id/eprint/53

Actions (login required)

View Item View Item
Unas Repository is powered by EPrints 3 which is developed by the School of Electronics and Computer Science at the University of Southampton. More information and software credits.