Abstract
In this paper, we investigate the cooperative diversity technique as a
candidate solution for combating turbulence-induced fading over free-space optical
(FSO) links. In particular, we propose a novel cooperation strategy that is suitable
for quantum-limited FSO systems with any number of relays and we derive closed-form
expressions for the error performance of this strategy. In scenarios where the
channel-state-information (CSI) is available at the different nodes, we propose an
optimal power allocation strategy that satisfies the Karush-Kuhn-Tucker (KKT)
conditions and that further boosts the performance of FSO networks. It turned out
that this closed-form optimal solution corresponds to transmitting the entire
optical power along the “strongest link” between the source and the destination
nodes. A simple procedure is proposed for selecting this link and for distributing
the power among its different hops.
© 2011 IEEE
PDF Article
More Like This
Cited By
You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.
Contact your librarian or system administrator
or
Login to access Optica Member Subscription