Title :
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
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;
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
DOI :
10.1109/CSNDSP.2008.4610818
