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Research
Prof. Jichai Jeong`s paper, accepted in Optics Express
Author Administrator (IP: *.152.163.70) Date 2014-09-16 15:31 Views 746
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Prof. Jichai Jeong`s new research on `Improvement of the chromatic dispersion tolerance in coherent optical OFDM systems using shifted DFT windows for ultra-long-haul optical transmission systems` was accepted in Optics Express.


Title: Improvement of the chromatic dispersion tolerance in coherent optical OFDM systems using shifted DFT windows for ultra-long-haul optical transmission systems


Abstract:

In a high-capacity ultra-long-haul optical coherent orthogonal frequency-division multiplexing (CO-OFDM) system, the dispersion tolerance is determined by the length of cyclic extension (CE). In this paper, we propose a novel scheme to substantially improve the dispersion tolerance of CO-OFDM systems without increasing the CE length. Multiple time-shifted discrete Fourier transform (DFT) windows are exploited at the receiver, each demodulating only a part of the subcarriers. Effectively, the proposed scheme reduces the bandwidth of the OFDM signals under demodulation. Numerical simulations are performed to show the improved dispersion tolerance of the proposed scheme in comparison with the conventional CO-OFDM system. We show that the dispersion tolerance improves by a factor equal to the number of DFT windows. The tradeoff between the improved dispersion tolerance and increased receiver complexity is also presented.

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Research
Prof. Christian Wallraven`s paper accepted in Cerebral Cortex
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2015-07-10

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2015-06-15

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2015-06-15

Prof. Heung-Il Suk`s paper accepted in Brain Structure & Function
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Prof. Heung-Il Suk`s new research on `Deep Sparse Multi-Task Learning for Feature Selection in Alzheimer’s Disease Diagnosis` was accepted in Brain Structure & Function.   Title: Deep Sparse Multi-Task Learning for Feature Selection in Alzheimer’s Disease Diagnosis   Abstract:   Recently, neuroimaging-based Alzheimer’s Disease (AD) or Mild Cognitive Impairment (MCI) diagnosis has attracted researchers in the field,…

2015-05-07

Prof. Seong-Whan Lee`s paper accepted in Pattern Recognition
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Prof. Seong-Whan Lee`s new research on `Subject-dependent Classification for Robust Idle State Detection using Multi-modal Neuroimaging and Data-fusion Techniques in BCI` was accepted in Pattern Recognition.   Title: Subject-dependent Classification for Robust Idle State Detection using Multi-modal Neuroimaging and Data-fusion Techniques in BCI   Abstract:   Brain–computer interfaces (BCIs) allow users to control external …

2015-05-04

Prof. Jichai Jeong`s paper accepted in IEEE/OSA Journal of Lightwave Technology
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Prof. Jichai Jeong`s new research on `Accurate Wavelength Calibration Method for Spectrometer using Low Coherence Interferometry` was accepted in IEEE/OSA Journal of Lightwave Technology.   Title: Accurate Wavelength Calibration Method for Spectrometer using Low Coherence Interferometry   Abstract: Dispersive spectrometers are subject to wavelength dispersion errors due to aberration, ruling errors, etc. Thus, …

2015-01-19

Prof. Seong-Whan Lee`s paper accepted in IEEE Transactions on Neural Systems and Rehabilitation Engineering
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2014-11-17

Prof. Jae-Ho Han`s paper accepted in IEEE/ASME Transactions on Mechatronics
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Prof. Jae-Ho Han`s new research on `Experimental Study of a Hybrid Small-Signal Parameter Modeling and Extraction Method for a Micro-Optoelectronic Device` was accepted in IEEE/ASME Transactions on Mechatronics.   Title: Experimental Study of a Hybrid Small-Signal Parameter Modeling and Extraction Method for a Micro-Optoelectronic Device Abstract:  In the device performance variation and control for micro-devices, accurate models are cr…

2014-11-05

Prof. Jichai Jeong`s paper, accepted in Optics Express
Prof. Jichai Jeong`s paper, accepted in Optics Express
Prof. Jichai Jeong`s new research on `Improvement of the chromatic dispersion tolerance in coherent optical OFDM systems using shifted DFT windows for ultra-long-haul optical transmission systems` was accepted in Optics Express. Title: Improvement of the chromatic dispersion tolerance in coherent optical OFDM systems using shifted DFT windows for ultra-long-haul optical transmission systems Abstract: In a high-capacity ultra-long-haul optic…

2014-09-16

Prof. Dong-Joo Kim`s paper, accepted in BMC Medicine
Prof. Dong-Joo Kim`s paper, accepted in BMC Medicine
Prof. Dong-Joo Kim`s new research on `Quantitative Analysis of Computed Tomography Images and Early Detection of Cerebral Edema for Pediatric Traumatic Brain Injury Patients: Retrospective Study` was accepted in BMC Medicine. Title: Quantitative Analysis of Computed Tomography Images and Early Detection of Cerebral Edema for Pediatric Traumatic Brain Injury Patients: Retrospective Study Abstract: The purpose of this study was to identify wh…

2014-09-01

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