Equalizer Design and Complexity for Digital Coherent Receivers

Spinnler, Bernhard

doi:10.1109/jstqe.2009.2035931

Cited by 161 publications

(113 citation statements)

References 42 publications

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“…Performing close to the matched-filter limit [3,4], coherently detected QPSK signals may use digital signal processing (DSP) to compensate for chromatic and polarization-mode dispersions [5][6][7]. However, for lasers with finite linewidth, the electronic equalizer produces equalization-enhanced phase noise (EEPN), which gives additional phase and intensity noises to the equalized signal [8][9][10], limiting system performance.…”

mentioning

confidence: 99%

Equalization-enhanced phase noise induced timing jitter

Ho¹,

Lau

Shieh

2011

Opt. Lett.

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confidence: 99%

Equalization-enhanced phase noise induced timing jitter

Ho¹,

Lau

Shieh

2011

Opt. Lett.

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“…We have also investigated the complexity of the three digital filters, and we evaluated the computational complexity in terms of complex multiplications per transmitted bit (Mults/bit) [28,29], which could be calculated as the following equations:…”

Section: Computational Complexity Of the Three Filtersmentioning

confidence: 99%

Chromatic dispersion compensation in coherent transmission system using digital filters

Xu¹,

Jacobsen²,

Popov³

et al. 2010

Opt. Express

120

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. (2010) Chromatic dispersion compensation in coherent transmission system using digital filters. Optics Express, 18 (15 Copies of full items can be used for personal research or study, educational, or not-for-profit purposes without prior permission or charge. Provided that the authors, title and full bibliographic details are credited, a hyperlink and/or URL is given for the original metadata page and the content is not changed in any way.Publisher's statement: © 2010 Optical Society of America. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modifications of the content of this paper are prohibited. http://dx.doi.org/10.1364/OE.18.016243 A note on versions: The version presented here may differ from the published version or, version of record, if you wish to cite this item you are advised to consult the publisher's version. Please see the 'permanent WRAP URL' above for details on accessing the published version and note that access may require a subscription. Abstract:We present a comparative analysis of three popular digital filters for chromatic dispersion compensation: a time-domain least mean square adaptive filter, a time-domain fiber dispersion finite impulse response filter, and a frequency-domain blind look-up filter. The filters are applied to equalize the chromatic dispersion in a 112-Gbit/s non-return-to-zero polarization division multiplexed quadrature phase shift keying transmission system. The characteristics of these filters are compared by evaluating their applicability for different fiber lengths, their usability for dispersion perturbations, and their computational complexity. In addition, the phase noise tolerance of these filters is also analyzed.

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“…The rationale behind using an FDE is the number of required complex multiplications as compared to time domain approach [6]. Next, the signal Q [k] obtained after multiplication is transformed back to time domain as q [k] and constitutes the output of the equalizer.…”

Section: Generic Scanning Algorithmmentioning

confidence: 99%