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Papers by ali rezania

Journal of Lightwave Technology, 2013

ABSTRACT

In high baud fiber-optic communication systems, the bandwidth limitation at the transmitter and r... more In high baud fiber-optic communication systems, the bandwidth limitation at the transmitter and receiver, and the linear and nonlinear responses of electro-optical components, drive amplifiers and digital-to-analog converters can introduce pattern dependent distortion that caused the signal-quality degradation. Furthermore, the use of narrow subcarrier spacing leads to cross-phase modulation (XPM) distortion considered one of the main obstacles to achieving large transmission distances in superchannel systems. The primary objective of this research is to mitigate the effect of pattern dependent distortion and enhance the transmission performance of high baud superchannel systems. Transmission of single-subcarrier 448 Gb/s dual-polarization 16-ary quadrature-amplitude modulation (DP 16-QAM) signal and a 1.206 Tb/s three-subcarrier superchannel signal using DP 16-QAM is demonstrated by applying a fixed look-up table (LUT) based on maximum-a-posteriori probability (MAP) detector at the...

Optical Fiber Communication Conference/National Fiber Optic Engineers Conference 2013, 2013

ABSTRACT We demonstrate a novel blind equalizer based on a constellation transformation, where a ... more ABSTRACT We demonstrate a novel blind equalizer based on a constellation transformation, where a 16-QAM signal is mapped into a QPSK constellation. Subsequently, the filter coefficients for an adaptive equalizer are updated using a constant modulus or decision-directed cost function.

Advanced Photonics 2016 (IPR, NOMA, Sensors, Networks, SPPCom, SOF), 2016

Journal of Lightwave Technology, 2015

For a 1.206 Tb/s three-carrier DP 16-QAM superchannel, the mutual information is evaluated withou... more For a 1.206 Tb/s three-carrier DP 16-QAM superchannel, the mutual information is evaluated without and with fixed look-up table based maximum-a-posteriori detection at the receiver to mitigate pattern-dependent distortion in the transmitted signal.

2014 The European Conference on Optical Communication (ECOC), 2014

Optical Fiber Communication Conference, 2014

Journal of Lightwave Technology, 2013

ABSTRACT

In high baud fiber-optic communication systems, the bandwidth limitation at the transmitter and r... more In high baud fiber-optic communication systems, the bandwidth limitation at the transmitter and receiver, and the linear and nonlinear responses of electro-optical components, drive amplifiers and digital-to-analog converters can introduce pattern dependent distortion that caused the signal-quality degradation. Furthermore, the use of narrow subcarrier spacing leads to cross-phase modulation (XPM) distortion considered one of the main obstacles to achieving large transmission distances in superchannel systems. The primary objective of this research is to mitigate the effect of pattern dependent distortion and enhance the transmission performance of high baud superchannel systems. Transmission of single-subcarrier 448 Gb/s dual-polarization 16-ary quadrature-amplitude modulation (DP 16-QAM) signal and a 1.206 Tb/s three-subcarrier superchannel signal using DP 16-QAM is demonstrated by applying a fixed look-up table (LUT) based on maximum-a-posteriori probability (MAP) detector at the...

Optical Fiber Communication Conference/National Fiber Optic Engineers Conference 2013, 2013

ABSTRACT We demonstrate a novel blind equalizer based on a constellation transformation, where a ... more ABSTRACT We demonstrate a novel blind equalizer based on a constellation transformation, where a 16-QAM signal is mapped into a QPSK constellation. Subsequently, the filter coefficients for an adaptive equalizer are updated using a constant modulus or decision-directed cost function.

Advanced Photonics 2016 (IPR, NOMA, Sensors, Networks, SPPCom, SOF), 2016

Journal of Lightwave Technology, 2015

For a 1.206 Tb/s three-carrier DP 16-QAM superchannel, the mutual information is evaluated withou... more For a 1.206 Tb/s three-carrier DP 16-QAM superchannel, the mutual information is evaluated without and with fixed look-up table based maximum-a-posteriori detection at the receiver to mitigate pattern-dependent distortion in the transmitted signal.

2014 The European Conference on Optical Communication (ECOC), 2014

Optical Fiber Communication Conference, 2014

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