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Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Xi-Cheng Zhang
  • Vol. 39, Iss. 12 — Jun. 15, 2014
  • pp: 3559–3562

Real-time validation of receiver state information in optical space–time block code systems

John Alamia and Timothy Kurzweg  »View Author Affiliations


Optics Letters, Vol. 39, Issue 12, pp. 3559-3562 (2014)
http://dx.doi.org/10.1364/OL.39.003559


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Abstract

Free space optical interconnect (FSOI) systems are a promising solution to interconnect bottlenecks in high-speed systems. To overcome some sources of diminished FSOI performance caused by close proximity of multiple optical channels, multiple-input multiple-output (MIMO) systems implementing encoding schemes such as space–time block coding (STBC) have been developed. These schemes utilize information pertaining to the optical channel to reconstruct transmitted data. The STBC system is dependent on accurate channel state information (CSI) for optimal system performance. As a result of dynamic changes in optical channels, a system in operation will need to have updated CSI. Therefore, validation of the CSI during operation is a necessary tool to ensure FSOI systems operate efficiently. In this Letter, we demonstrate a method of validating CSI, in real time, through the use of moving averages of the maximum likelihood decoder data, and its capacity to predict the bit error rate (BER) of the system.

© 2014 Optical Society of America

OCIS Codes
(060.4510) Fiber optics and optical communications : Optical communications
(200.4650) Optics in computing : Optical interconnects
(200.2605) Optics in computing : Free-space optical communication

ToC Category:
Optics in Computing

History
Original Manuscript: March 14, 2014
Revised Manuscript: May 8, 2014
Manuscript Accepted: May 8, 2014
Published: June 10, 2014

Citation
John Alamia and Timothy Kurzweg, "Real-time validation of receiver state information in optical space–time block code systems," Opt. Lett. 39, 3559-3562 (2014)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-39-12-3559


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