Papers by Md. Saifuddin Faruk
2012 IEEE 3rd International Conference on Photonics, 2012
Abstract We propose and demonstrate a low complexity non decision directed blind carrier recovery... more Abstract We propose and demonstrate a low complexity non decision directed blind carrier recovery algorithm (NDD-CRA) for 16-QAM optical coherent receivers. Through optimization of step size parameter (μ), we obtained similar performance compared to decision-directed phase estimation algorithm, however, our propose scheme has less complexity compared to the decision directed carrier recovery algorithm (DD-CRA) as the proposed scheme does not require any decision feedback module. From simulation, it is observed that the ...
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Optical Fiber Communication Conference, 2016
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8Th International Conference on Electrical and Computer Engineering, Dec 1, 2014
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16Th Opto Electronics and Communications Conference, 2011
Abstract We propose and experimentally demonstrate a novel method of monitoring the optical signa... more Abstract We propose and experimentally demonstrate a novel method of monitoring the optical signal-to-noise ratio, which is based on second-and fourth-order statistical moments of the equalized signal from an adaptive filter in coherent optical receivers.
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Optical and Quantum Electronics, 2015
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16Th Int L Conf Computer and Information Technology, Mar 1, 2014
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In this paper, we propose a novel hardware-efficient quadrature imbalance compensator circuit for... more In this paper, we propose a novel hardware-efficient quadrature imbalance compensator circuit for coherent optical receivers. Numerical simulations for 16-QAM format show that it can fully compensate the quadrature imbalance over a wide range.
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Optical Fiber Communication Conference, 2014
ABSTRACT We propose a novel method of OSNR estimation in Nyquist-WDM transmission systems based o... more ABSTRACT We propose a novel method of OSNR estimation in Nyquist-WDM transmission systems based on the measurement of statistical moments of equalized signals in the digital coherent receiver. Its effectiveness is verified with computer simulations.
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Optical Fiber Communication Conference/National Fiber Optic Engineers Conference 2011, 2011
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Optics Express, 2010
We propose a novel and unified algorithm that estimates linear impairments in optical transmissio... more We propose a novel and unified algorithm that estimates linear impairments in optical transmission systems from tap coefficients of an adaptive finite-impulse response (FIR) filter in a coherent optical receiver. Measurable impairments include chromatic dispersion (CD), differential group delay (DGD) between two principal states of polarization, second-order polarization-mode dispersion (second-order PMD), and polarization-dependent loss (PDL). We validate our multi-impairment monitoring algorithm by dual-polarization quadrature phase-shift keying (QPSK) transmission experiments.
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IEEE Photonics Journal, 2014
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16th Int'l Conf. Computer and Information Technology, 2014
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8th International Conference on Electrical and Computer Engineering, 2014
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CLEO:2011 - Laser Applications to Photonic Applications, 2011
Page 1. Frequency-Domain Adaptive Equalization in Digital Coherent Receivers Md. Saifuddin Faruk*... more Page 1. Frequency-Domain Adaptive Equalization in Digital Coherent Receivers Md. Saifuddin Faruk* and Kazuro Kikuchi Department of Electrical Engineering and Information Systems, The University of Tokyo, 7-3-1 Hongo ...
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2012 7th International Conference on Electrical and Computer Engineering, 2012
ABSTRACT Among the wide spectrum of optical performance monitoring (OPM), optical signal-to-noise... more ABSTRACT Among the wide spectrum of optical performance monitoring (OPM), optical signal-to-noise ratio (OSNR) monitoring is very important as it signify a direct measure of signal quality. In this paper, we propose a novel method of OSNR monitoring from the second- and fourth-order statistical moments of equalized signal in 16-QAM coherent optical receivers. The distinct statistical nature of carrier signal and noise enables such estimation. The proposed scheme is verified using computer simulation of 10-Gsymbols/s 16-QAM optical transmission systems. It is found that our scheme can estimate the OSNR with less that 0.5-dB error over a wide monitoring range.
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14th International Conference on Computer and Information Technology (ICCIT 2011), 2011
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2012 17th Opto-Electronics and Communications Conference, 2012
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Papers by Md. Saifuddin Faruk