Analysis of Nonlinear Phase Noise in Single-Carrier and OFDM Systems

Kumar, Shiva; Zhu, Xianming

doi:10.1007/978-1-4419-8139-4_7

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2015

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“…Wavelength-division-multiplexed (WDM) systems have been extensively studied in currently existing literature [1], [2]. As the launch power increases, the nonlinear signal and noise interaction becomes relevant, and in WDM systems, the nonlinear interaction between WDM channels is an important factor in performance degradation.…”

Section: Introductionmentioning

confidence: 99%

Signal Constellation Design for Cross-Phase Modulation Dominated Channels

Liu

Djordjević

2015

IEEE Photonics J.

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In this paper, we introduce an optimal signal constellation design algorithm suitable for wavelength-division-multiplexed systems dominated by cross-phase modulation (XPM), which is called XPM-OSCD. Additionally, a corresponding demodulation scheme is also proposed in order to better compensate for the nonlinear phase errors. In this scheme, the cumulative log-likelihood function is used as the optimization criterion. The signal constellations obtained by this algorithm significantly outperform conventional quadrature amplitude modulation (QAM).

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Section: Introductionmentioning

confidence: 99%