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) (KAR id:35698)
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. | |
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 |
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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: | Divisions > Division of Computing, Engineering and Mathematical Sciences > School of Engineering and Digital Arts |
Depositing User: | Tina Thompson |
Date Deposited: | 28 Oct 2013 11:58 UTC |
Last Modified: | 16 Nov 2021 10:12 UTC |
Resource URI: | https://kar.kent.ac.uk/id/eprint/35698 (The current URI for this page, for reference purposes) |
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