Title :
Signal Constellation Design for Cross-Phase Modulation Dominated Channels
Author :
Tao Liu ; Djordjevic, Ivan B.
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Arizona, Tucson, AZ, USA
Abstract :
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).
Keywords :
optical information processing; optical modulation; phase modulation; wavelength division multiplexing; cross-phase modulation dominated channels; cumulative log-likelihood function; demodulation scheme; nonlinear phase errors; signal constellation design; wavelength-division-multiplexed systems; Algorithm design and analysis; Channel models; Constellation diagram; Demodulation; Optical fibers; Wavelength division multiplexing; Microwave photonics communications; block-interleaved coded modulation (BICM); cross-phase modulation; demodulator; optimal signal constellation; wavelength-division multiplexing (WDM);
Journal_Title :
Photonics Journal, IEEE
DOI :
10.1109/JPHOT.2015.2453880
