Wiener Filter for Short-Reach Fiber-Optic Links

Analytic expressions are derived for the Wiener filter (WF), also known as the linear minimum mean square error (LMMSE) estimator, for an intensity-modulation/direct-detection (IM/DD) short-haul fiber-optic communication system. The link is purely dispersive and the nonlinear square-law detector (SL...

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Bibliographic Details
Published inIEEE communications letters Vol. 24; no. 11; pp. 2546 - 2550
Main Authors Plabst, Daniel, Gomez, Francisco Javier Garcia, Wiegart, Thomas, Hanik, Norbert
Format Journal Article
LanguageEnglish
Published New York IEEE 01.11.2020
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Barium
Communication systems
Communications systems
Constellations
Digital dispersion equalization
Fiber optics
geometric shaping
intensity modulation/direct detection (IM/DD)
LMMSE estimator
Nonlinear optics
Optical fibers
Optical receivers
Optical transmitters
short-haul fiber-optic communication
Superluminescent diodes
Thermal noise
Wiener filter
Wiener filtering
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Summary:Analytic expressions are derived for the Wiener filter (WF), also known as the linear minimum mean square error (LMMSE) estimator, for an intensity-modulation/direct-detection (IM/DD) short-haul fiber-optic communication system. The link is purely dispersive and the nonlinear square-law detector (SLD) operates at the thermal noise limit. The achievable rates of geometrically shaped PAM constellations are substantially increased by taking the SLD into account as compared to a WF that ignores the SLD.
ISSN:1089-7798
1558-2558
DOI:10.1109/LCOMM.2020.3006921