28 June 2017 Enhanced frequency-domain fractionally spaced equalization for coherent optical transmission system with colored noise
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Optical Engineering, 56(6), 066116 (2017). doi:10.1117/1.OE.56.6.066116
Abstract
An enhanced minimum mean-square-error (MMSE) frequency-domain (FD) fractionally spaced equalizer (FSE) for polarization demultiplexing is proposed in the presence of colored noise. The 2-norm of the estimated channel matrix and polynomial fitting of equalization coefficients are introduced to mitigate the colored noise without requiring knowledge of the optical and electrical filtering. Simulation results show that ∼3-dB improvement of equalization performance is achieved compared to conventional MMSE FD-FSE in an 8×112-Gbit/s wavelength-division multiplexing polarization-division multiplexing-quadrature phase shift keying transmission system over a 1200-km single mode fiber link.
Ming Hao, Lianshan Yan, Anlin Yi, Lin Jiang, Yan Pan, Wei Pan, Bin Luo, "Enhanced frequency-domain fractionally spaced equalization for coherent optical transmission system with colored noise," Optical Engineering 56(6), 066116 (28 June 2017). http://dx.doi.org/10.1117/1.OE.56.6.066116
Submission: Received 9 February 2017; Accepted 5 June 2017
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KEYWORDS
Transmittance

Single mode fibers

Phase shift keying

Wavelength division multiplexing

Optical filters

Channel projecting optics

Polarization

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