Search Results - "Seo, Dongsun"

Ambient LED Light Noise Reduction Using Adaptive Differential Equalization in Li-Fi Wireless Link by Won, Yong-Yuk, Yoon, Sang Min, Seo, Dongsun

“…For Li-Fi wireless links based on a white light emitting diode, an adaptive differential equalization (ADE) technique that reduces various noises such as…”
Get full text

Simultaneous visible LED wireless transmission of discrete multitone and on–off keying signal using a statistical adaptive equalizer by Won, Yong-Yuk, Yoon, Sang Min, Seo, Dongsun

“…We propose a statistical adaptive equalizer to simultaneously transmit a discrete multitone signal encoded by quadrature phase shift keying and…”
Get full text

Reconfigurable and Tunable Flat-Top Microwave Photonic Filters Utilizing Optical Frequency Combs by Minhyup Song, Long, C. M., Rui Wu, Dongsun Seo, Leaird, D. E., Weiner, A. M.

“…We demonstrate reconfigurable and tunable flat-top microwave photonic filters based on an optical comb source and a dispersive medium. Complex taps allowing…”
Get full text

Four-user 10-Gb/s spectrally phase-coded O-CDMA system operating at ~30 fJ/bit by Zhi Jiang, Zhi Jiang, Dongsun Seo, Dongsun Seo, Shangda Yang, Shangda Yang, D.E. Leaird, D.E. Leaird, R.V. Roussev, R.V. Roussev, C. Langrock, C. Langrock, M.M. Fejer, M.M. Fejer, A.M. Weiner, A.M. Weiner

Get full text

Wireless Light Fidelity Channel Capacity Improvement Using Sparse Sampled Non-Orthogonal Frequency Shift Keying by Cheong, Daewoong, Yoon, Sang Min, Yoon, Gangjoon, Seo, Dongsun, Won, Yong-Yuk

“…A new technique, which can increase the wireless light fidelity channel capacity based on the white light emitting diode, is proposed. It is implemented by…”
Get full text

Guided lazy snapping for long thin object selection by Tran, Nam H., Seo, Dongsun, Tu, Henry T.H.

“…We show a novel way to select long thin objects in an image by enhancing the output of the existing foreground/background image segmentation methods. Most…”
Get full text

Photonically assisted generation of arbitrary millimeter-wave and microwave electromagnetic waveforms via direct space-to-time optical pulse shaping by McKinney, J.D., Dongsun Seo, Leaird, D.E., Weiner, A.M.

“…We present our work in optical generation of arbitrarily shaped millimeter-wave electromagnetic waveforms. Through a novel technique, which utilizes tailored…”
Get full text

Four-user 10-Gb/s spectrally phase-coded O-CDMA system operating at /spl sim/30 fJ/bit by Zhi Jiang, Dongsun Seo, Shangda Yang, Leaird, D.E., Roussev, R.V., Langrock, C., Fejer, M.M., Weiner, A.M.

“…We demonstrate a four-user 10-Gb/s spectrally phase-coded optical code-division multiple-access system via nonlinear processing with ultralow power (/spl…”
Get full text

A Simplistic Method to Generate Highly Flat Optical Frequency Combs by Thanh Tuan Tran, Minje Song, Minhyup Song, Dongsun Seo

“…We demonstrate a simplistic scheme to generate highly flat optical frequency combs. Our results show the spectral flatness within 1 dB for 35 taps and 1.5 dB…”
Get full text

Reduction of optical beat interference noise using statistical adaptive derivative equalizer by Won, Yong-Yuk, Yoon, Sang Min, Seo, Dongsun

“…In this paper, we propose a statistical adaptive derivative equalizer (SADE) in order to reduce an optical beat interference (OBI) noise in an optical access…”
Get full text

Improvement of optical access M-QAM transmission capacity using DSP based non-orthogonal frequency shift keying by Yong-Yuk Won, Sang Min Yoon, Dongsun Seo

“…Non-orthogonal frequency quadrature amplitude modulation (NOFQAM) is proposed to improve the transmission capacity of optical access link. In case of…”
Get full text

Improvement of optical fiber channel capacity using compressed non-orthogonal frequency quadrature amplitude modulation by Won, Yong-Yuk, Min Yoon, Sang, Seo, Dongsun

“…•A NoFQAM modulation was proposed to increase the optical channel capacity.•It was implemented using non-orthogonal FSK and QAM and sparse sinusoidal…”
Get full text

Orthogonal frequency division multiplexed passive optical access transmission with improved transmission capacity by the use of adaptive sampling based on compressed sensing by Yong-Yuk Won, Dongsun Seo, Sang Min Yoon

“…The transmission Capacity of optical orthogonal frequency division multiplexed (OFDM) access link is improved using compressed sensing-based adaptive sampling…”
Get full text

Three dimensional modulation for improved transmission capacity in white LED based optical wireless link by Yong-Yuk Won, Sang Min Yoon, Dongsun Seo

“…A three dimensional modulation, which can improve the channel capacity of visible optical wireless transmission, is proposed, where it is implemented by the…”
Get full text

Reduction of amplified spontaneous emission noise using a statistical signal adaptive filter by Won, Yong-Yuk, Yoon, Sang Min, Seo, Dongsun

“…This paper proposes a statistical signal adaptive filter (SSAF) based on adaptive total variation to reduce amplified spontaneous emission (ASE) noise in…”
Get full text

Bandwidth efficiency improvement of optical wireless link based on yellow phosphor coated light emitting diode using non‐orthogonal frequency shift keying by Won, Yong‐Yuk, Yoon, Sang Min, Seo, Dongsun

“…ABSTRACT A non‐orthogonal frequency shift keying (NOFSK) modulation technique, which increases the bandwidth efficiency of an optical wireless link based on a…”
Get full text

Timing jitter reduction of optical pulse source using unpumped erbium doped fiber by Hussain, Sadaqat, Won, Yong-Yuk, Seo, Dongsun

“…A technique to enhance the stability of optical pulse source has been proposed that employs a specific length of unpumped erbium doped fiber. Two types of…”
Get full text

High-speed optical pulse train generation by line-by-line spectral intensity and phase coding by Ikhwan Kim, Hyunjoo Sung, Dongsun Seo

“…We generate ~100 GHz pulse trains from a relatively low-speed mode-locked laser by line-by-line spectral coding using a simple intensity and phase mask. To…”
Get full text

Optical access transmission with improved channel capacity using non-orthogonal frequency quadrature amplitude modulation by Won, Yong-Yuk, Yoon, Sang Min, Seo, Dongsun

“…A new modulation scheme that improves the bandwidth efficiency of an optical access link is proposed in this paper. It is implemented using non-orthogonal…”
Get full text

Asymmetric peak to average power ratio impacts on direct-detected optical OFDM transmission link by Won, Yong-Yuk, Kim, Chang-Hun, Han, Sang-Kook, Seo, Dongsun

“…ABSTRACT In this article, the impact of asymmetric peak to average power ratio (PAPR) of orthogonal frequency division multiplexing (OFDM) signal is…”
Get full text