On the channel capacity of two-dimensional FSO/CDMA systems over atmospheric turbulence channels

Author

Pham, Anh T. ; Luu, Tu A. ; Thang, Truong C.

Author_Institution

Sch. of Comput. Sci. & Eng., Univ. of Aizu, Aizu-Wakamatsu, Japan

fYear

2011

fDate

5-9 Dec. 2011

Firstpage

838

Lastpage

842

Abstract

We quantitatively study the performance limits of two-dimensional (2-D) free-space optical code-division multiple-access (FSO/CDMA) systems over weak and strong atmospheric turbulence channels. The theoretical bounds for channel capacity are derived taking into account multiple-access interference (MAI), optical beating interference (OBI) and receiver noise. Forward error correction (FEC) codes are employed to mitigate the impact of turbulence. We find that the impact of atmospheric turbulence on the channel capacity limit is severe, especially when the turbulence is strong. The channel capacity limit is decreased as much as 16% when turbulence variance σ_s² = 0.6178.

Keywords

atmospheric turbulence; channel capacity; code division multiple access; forward error correction; optical links; 2D FSO/CDMA systems; atmospheric turbulence channels; channel capacity; forward error correction codes; free-space optical code-division multiple-access systems; multiple-access interference; optical beating interference; receiver noise; Adaptive optics; Channel capacity; Multiaccess communication; Optical fibers; Optical receivers; CDMA; atmospheric turbulence; forward error correction (FEC); free-space optics (FSO);

fLanguage

English

Publisher

ieee

Conference_Titel

GLOBECOM Workshops (GC Wkshps), 2011 IEEE

Conference_Location

Houston, TX

Print_ISBN

978-1-4673-0039-1

Electronic_ISBN

978-1-4673-0038-4

Type

conf

DOI

10.1109/GLOCOMW.2011.6162572

Filename

6162572