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Abdullah S. Karar
Researcher at American University of the Middle East
Publications - 67
Citations - 874
Abdullah S. Karar is an academic researcher from American University of the Middle East. The author has contributed to research in topics: Quadrature amplitude modulation & Laser. The author has an hindex of 13, co-authored 67 publications receiving 700 citations. Previous affiliations of Abdullah S. Karar include Carleton University & Infinera.
Papers
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Journal ArticleDOI
100 Gb/s Intensity Modulation and Direct Detection
TL;DR: As an illustrative example of using digital signal processing enabled transmitters and receivers to allow relatively modest symbol rates, the generation and detection of 112 Gb/s 16-QAM half-cycle Nyquist subcarrier modulation are considered using dual-polarization, single-carrier and single-polarsization, dual-car carrier implementations.
Journal ArticleDOI
Reducing the complexity of perturbation based nonlinearity pre-compensation using symmetric EDC and pulse shaping
Ying Gao,John C. Cartledge,Abdullah S. Karar,Scott S.-H. Yam,Maurice O'Sullivan,Charles Laperle,Andrzej Borowiec,Kim B. Roberts +7 more
TL;DR: Perturbation based nonlinearity pre-compensation has been performed for a 128 Gbit/s single-carrier dual-polarization 16-ary quadrature-amplitude-modulation (DP 16-QAM) signal.
Journal ArticleDOI
Linewidth-Tolerant and Low-Complexity Two-Stage Carrier Phase Estimation for Dual-Polarization 16-QAM Coherent Optical Fiber Communications
TL;DR: Two novel linewidth-tolerant, low-complexity feedforward carrier phase estimation algorithms are described for dual-polarization 16-ary quadrature-amplitude-modulation with coherent detection.
Proceedings ArticleDOI
Generation and Detection of a 112-Gb/s Dual Polarization Signal Using a Directly Modulated Laser and Half-Cycle 16-QAM Nyquist-Subcarrier-Modulation
TL;DR: In this paper, a 56-Gb/s 16-QAM signal was generated using subcarrier modulation with a sub-carrier frequency of half the symbol rate, Nyquist pulse shaping, and a directly modulated passive feedback laser.
Journal ArticleDOI
Generation and Detection of a 56 Gb/s Signal Using a DML and Half-Cycle 16-QAM Nyquist-SCM
TL;DR: In this article, a 16-QAM signal is generated using subcarrier modulation with a sub-carrier frequency of half the symbol rate, Nyquist pulse shaping, and a directly modulated passive feedback laser at bit rates of 14, 28, and 56 Gb/s.