Τίτλος:
Mixed Topology of DF Relayed Terrestrial Optical Wireless Links with
Generalized Pointing Errors over Turbulence Channels
Γλώσσες Τεκμηρίου:
Αγγλικά
Περίληψη:
This study investigated the outage performance of a terrestrial FSO
communication system that uses mixed series and parallel
decode-and-forward (DF) relay-assisted (i.e., cooperative diversity)
configurations, taking into account the influence of both atmospheric
turbulence and pointing error effects. Turbulence-induced optical signal
fading is modeled by gamma-gamma or the negative exponential
distribution for weak to strong and saturated turbulence conditions,
respectively. Additionally, weak to strong non-zero boresight
misalignment-induced optical signal fading is modeled by the generalized
Beckmann distribution. Under these conditions, an outage analysis of the
examined FSO system is performed, in terms of both outage probability
and mean outage duration metrics. Thus, fairly accurate closed-form
mathematical expressions for both performance metrics are derived, while
their corresponding analytical results demonstrate concrete performance
and availability improvements for the total FSO system, especially when
the number of the connected in parallel DF relays increases. Moreover,
the obtained results are verified through the corresponding simulation
results.
Συγγραφείς:
Varotsos, George K.
Nistazakis, Hector E.
Stassinakis, Argyris
N.
Volos, Christos K.
Christofilakis, Vasileios
Tombras,
George S.
Περιοδικό:
Dissolution Technologies
Λέξεις-κλειδιά:
free space optical communication systems; mixed series and parallel DF
relay-assisted configurations; nonzero boresight misalignment-induced
fading; turbulence-induced fading; gamma-gamma distribution; negative
exponential distribution; Beckmann distribution; outage probability;
mean outage duration
DOI:
10.3390/technologies6040121
