Title :
Space-Time Coding versus Repetition Coding for Free-Space Optical Communication
Author :
Safari, Majid ; Uysal, Murat
Author_Institution :
Univ. of Waterloo, Waterloo
Abstract :
In this paper, we investigate spatial diversity techniques for free-space optical (FSO) links with intensity modulation and direct detection (IM/DD) over log-normal atmospheric turbulence-induced fading channels. We consider the deployment of space-time block codes and repetition codes. Our performance analysis demonstrates that although both schemes are able to extract full diversity, repetition codes outperform their counterparts. The performance gap increases as the number of transmit apertures increases. Our findings clearly point out that deployment of space-time coding is not necessary for a FSO IM/DD link.
Keywords :
diversity reception; fading channels; optical communication; space-time codes; atmospheric turbulence-induced fading channel; free-space optical communication; free-space optical links; intensity modulation; repetition coding; space-time block coding; spatial diversity technique; Apertures; Block codes; Employment; Fading; Intensity modulation; MIMO; Maximum likelihood detection; Optical fiber communication; Pulse modulation; Radio frequency; Free-space optical communication; atmosheric turbulence; space-time coding; spatial diversity;
Conference_Titel :
Signals, Systems and Computers, 2007. ACSSC 2007. Conference Record of the Forty-First Asilomar Conference on
Conference_Location :
Pacific Grove, CA
Print_ISBN :
978-1-4244-2109-1
Electronic_ISBN :
1058-6393
DOI :
10.1109/ACSSC.2007.4487377
