Constellation Shaping for Fiber-Optic Channels With QAM and High Spectral Efficiency

In this letter, the fiber-optic communication channel with a quadrature amplitude modulation (QAM) input constellation is treated. Using probabilistic shaping, we show that high-order QAM constellations can achieve and slightly exceed the lower bound on the channel capacity, set by ring constellatio...

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Veröffentlicht in:	IEEE photonics technology letters 2014-12, Vol.26 (23), p.2407-2410
Hauptverfasser:	Yankov, Metodi P., Zibar, Darko, Larsen, Knud J., Christensen, Lars P. B., Forchhammer, Soren
Format:	Artikel
Sprache:	eng
Schlagworte:	Bit error rate Channels Codes Communication channels Constellations Fiber optics Impairment Mapping Optical fiber communication Optical fibers Optimization Quadrature amplitude modulation Simulation Spectra Turbo codes
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