e-journal

Survey on Free Space Optical Communication: A Communication Theory Perspective

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Abstract
Optical wireless communication (OWC) refers to transmission in unguided propagation media through the use of optical carriers, i.e., visible, infrared (IR), and ultraviolet (UV) bands. In this survey, we focus on outdoor terrestrial OWC links which operate in near IR band. These are widely referred
to as free space optical (FSO) communication in the literature. FSO systems are used for high rate communication between two fixed points over distances up to several kilometers. In comparison
to radio-frequency (RF) counterparts, FSO links have a very high optical bandwidth available, allowing much higher data rates. They are appealing for a wide range of applications such as metropolitan area network (MAN) extension, local area network (LAN)-to-LAN connectivity, fiber back-up, backhaul for
wireless cellular networks, disaster recovery, high definition TV andmedical image/video transmission, wireless video surveillance/monitoring, and quantum key distribution among others. Despite
the major advantages of FSO technology and variety of its application areas, its widespread use has been hampered by its rather disappointing link reliability particularly in long ranges due to atmospheric turbulence-induced fading and sensitivity to weather conditions. In the last five years or so, there has been a surge of interest in FSO research to address these major technical challenges. Several innovative physical layer concepts, originally introduced in the context of RF systems, such as multiple-input multiple-output communication, cooperative diversity, and adaptive transmission have been recently explored for the design of next generation FSO systems. In this paper, we present an up-to-date survey on FSO communication systems. The first part describes FSO channel models and transmitter/receiver structures. In the second part, we provide details on information theoretical limits of FSO channels and algorithmic-level system design research activities to approach these limits. Specific topics include advances in modulation, channel coding, spatial/cooperative diversity techniques, adaptive transmission, and hybrid RF/FSO systems.

Index Terms—Free-space optical (FSO) communication, optical wireless communication (OWC), channel modeling, optical modulation, spatial diversity, channel capacity, channel coding, hybrid RF/FSO systems, relay-assisted networks, adaptive transmission

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Ketersediaan

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Informasi Detail

Judul Seri

IEEE COMMUNICATION SURVEYS & TUTORIALS, VOL. 16, NO. 4, FOURTH QUARTER 2014

No. Panggil

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Penerbit

: IEEE., 2014

Deskripsi Fisik

IEEE COMMUNICATION SURVEYS & TUTORIALS, VOL. 16, NO. 4, FOURTH QUARTER 2014

Bahasa

English

ISBN/ISSN

1553-877X

Klasifikasi

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Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

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Subjek

optical wireless communication (OWC)
hybrid RF/FSO systems
channel coding

Info Detail Spesifik

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Pernyataan Tanggungjawab

ETY

Versi lain/terkait

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