TY - GEN
T1 - Relay-assisted free-space optical communication
AU - Safari, Majid
AU - Uysal, Murat
PY - 2007
Y1 - 2007
N2 - In this paper, we present relay-assisted transmission as a powerful fading mitigation tool for free-space optical systems operating in atmospheric turbulence channels. We study both serial (i.e., multi-hop transmission) and parallel (i.e., cooperative diversity) decode-and-forward relaying. We consider an aggregated channel model which takes into account both path-loss and turbulence-induced log-normal fading. Since fading variance is distance-dependent in free-space optical systems, relay-assisted transmission takes advantage of the shorter hops and brings significant performance improvements. We have derived closed form expressions for outage probability of the relaying schemes under consideration which are further confirmed through Monte-Carlo simulations. Our outage probability analysis demonstrates that an impressive performance improvement of 18.5dB is possible with the use of a single relay at a target outage probability of 10-6.
AB - In this paper, we present relay-assisted transmission as a powerful fading mitigation tool for free-space optical systems operating in atmospheric turbulence channels. We study both serial (i.e., multi-hop transmission) and parallel (i.e., cooperative diversity) decode-and-forward relaying. We consider an aggregated channel model which takes into account both path-loss and turbulence-induced log-normal fading. Since fading variance is distance-dependent in free-space optical systems, relay-assisted transmission takes advantage of the shorter hops and brings significant performance improvements. We have derived closed form expressions for outage probability of the relaying schemes under consideration which are further confirmed through Monte-Carlo simulations. Our outage probability analysis demonstrates that an impressive performance improvement of 18.5dB is possible with the use of a single relay at a target outage probability of 10-6.
UR - http://www.scopus.com/inward/record.url?scp=50349094942&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=50349094942&partnerID=8YFLogxK
U2 - 10.1109/ACSSC.2007.4487565
DO - 10.1109/ACSSC.2007.4487565
M3 - Conference contribution
AN - SCOPUS:50349094942
SN - 9781424421107
T3 - Conference Record - Asilomar Conference on Signals, Systems and Computers
SP - 1891
EP - 1895
BT - Conference Record of the 41st Asilomar Conference on Signals, Systems and Computers, ACSSC
T2 - 41st Asilomar Conference on Signals, Systems and Computers, ACSSC
Y2 - 4 November 2007 through 7 November 2007
ER -