BER performance of DPSK subcarrier modulated free space optics in fully developed speckle

Author

Popoola, W.O. ; Ghassemlooy, Z. ; Leitgeb, E.

Author_Institution

Opt. Commun. Res. Group, Northumbria Univ., Newcastle upon Tyne

fYear

2008

fDate

25-25 July 2008

Firstpage

273

Lastpage

277

Abstract

In this paper a DPSK subcarrier intensity modulated (SIM) free space optical (FSO) link is considered in negative exponential atmospheric turbulence environment. To mitigate the scintillation effect the selection combining spatial diversity scheme (SelC) is employed at the receiver. Bit error rate (BER) analysis is presented with and without SelC spatial diversity, and it is shown that at BER of 10-6 using four independent PIN-photodetectors, a diversity gain of not less than 38 dB is achievable.

Keywords

differential phase shift keying; error statistics; intensity modulation; optical links; p-i-n photodiodes; photodetectors; PIN-photodetectors; bit error rate; differential phase shift keying; free space optical link; negative exponential atmospheric turbulence; selection combining spatial diversity; subcarrier intensity modulation; Adaptive optics; Bit error rate; Differential quadrature phase shift keying; Diversity methods; Diversity reception; Error analysis; Intensity modulation; Optical modulation; Optical receivers; Speckle; DPSK; Free-space optics; Negative exponential distribution; spatial diversity; turbulence;

fLanguage

English

Publisher

ieee

Conference_Titel

Communication Systems, Networks and Digital Signal Processing, 2008. CNSDSP 2008. 6th International Symposium on

Conference_Location

Graz

Print_ISBN

978-1-4244-1875-6

Electronic_ISBN

978-1-4244-1876-3

Type

conf

DOI

10.1109/CSNDSP.2008.4610818

Filename

4610818