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Free-space optical communication employing subcarrier modulation and spatial diversity in atmospheric turbulence channel

Popoola, Wasiu O., Ghassemlooy, Zabih, Gao, Steven, Allen, John, Leitgeb, Erich (2008) Free-space optical communication employing subcarrier modulation and spatial diversity in atmospheric turbulence channel. IET Optoelectronics, 2 (1). pp. 16-23. ISSN 1751-8768. (doi:10.1049/iet-opt:20070030) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided. (Contact us about this Publication)
Official URL
http://dx.doi.org/10.1049/iet-opt:20070030

Abstract

An expression for the bit error rate of a multiple subcarrier intensity-modulated atmospheric optical communication system employing spatial diversity is derived. Spatial diversity is used to mitigate scintillation caused by atmospheric turbulence, which is assumed to obey log-normal distribution. Optimal but complex maximum ratio, equal gain combining (EGC) and relatively simple selection combining spatial diversity techniques in a clear atmosphere are considered. Each subcarrier is modulated using binary phase shift keying. Laser irradiance is subsequently modulated by a subcarrier signal, and a direct detection PIN receiver is employed (i.e. intensity modulation/direction detection). At a subcarrier level, coherent demodulation is used to extract the transmitted data/information. The performance of on-off-keying is also presented and compared with the subcarrier intensity modulation under the same atmospheric conditions.

Item Type: Article
DOI/Identification number: 10.1049/iet-opt:20070030
Uncontrolled keywords: INSPEC: CONTROLLED INDEXING atmospheric light propagation atmospheric turbulence log normal distribution optical links INSPEC: NON CONTROLLED INDEXING atmospheric conditions atmospheric turbulence channel binary phase shift keying bit error rate equal gain combining free-space optical communication intensity modulation laser irradiance log-normal distribution multiple subcarrier intensity-modulated atmospheric optical communication scintillation spatial diversity subcarrier modulation
Subjects: T Technology
Divisions: Faculties > Sciences > School of Engineering and Digital Arts
Faculties > Sciences > School of Engineering and Digital Arts > Broadband & Wireless Communications
Depositing User: Tina Thompson
Date Deposited: 28 Oct 2013 11:58 UTC
Last Modified: 29 May 2019 11:10 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/35698 (The current URI for this page, for reference purposes)
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