On free-space optic communication with Alamouti-type coding and direct detection

Author

Tabach, Mamdouh El ; Tortelier, Patrick ; Pyndiah, Ramesh ; Bouchet, Olivier

Author_Institution

France Telecom, Cesson-Sevigne

fYear

2008

fDate

7-9 May 2008

Firstpage

740

Lastpage

743

Abstract

By Transmitting unipolar positive signals, a novel association of Alamouti space-time coding to free-space optic (FSO) communication is presented. We examine intensity modulation (IM) based on electrical fast Fourier transform (FFT) design with Hermitian symmetry. The proposed technique aims at limiting signal fading due to scintillation. It maximizes the spatial diversity, increases the reliability, and makes it possible to use digital complex QAM modulations while preserving direct detection (DD).

Keywords

fast Fourier transforms; intensity modulation; optical communication; quadrature amplitude modulation; space-time codes; Alamouti-type coding; Hermitian symmetry; digital complex QAM modulations; direct detection; electrical fast Fourier transform; free-space optic communication; intensity modulation; scintillation; space-time coding; Fading; Intensity modulation; Optical modulation; Optical propagation; Optical receivers; Optical scattering; Optical transmitters; Quadrature amplitude modulation; Signal to noise ratio; Solid scintillation detectors; Alamouti; FSO; IM/DD; QAM; optical wireless; spatial diversity;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless Pervasive Computing, 2008. ISWPC 2008. 3rd International Symposium on

Conference_Location

Santorini

Print_ISBN

978-1-4244-1652-3

Electronic_ISBN

978-1-4244-1653-0

Type

conf

DOI

10.1109/ISWPC.2008.4556308

Filename

4556308