The Experts below are selected from a list of 9819 Experts worldwide ranked by ideXlab platform
Ivan B. Djordjevic - One of the best experts on this subject based on the ideXlab platform.
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universal hybrid probabilistic geometric shaping based on two dimensional distribution matchers
Optical Fiber Communication Conference, 2018Co-Authors: Zhen Qu, Shaoliang Zhang, Ivan B. DjordjevicAbstract:We propose universal distribution matchers applicable to any two-dimensional Signal Constellation. We experimentally demonstrate that the performance of 32-ary QAM, based on hybrid probabilistic-geometric shaping, is superior to probabilistically shaped 32QAM and regular 32QAM.
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Signal Constellation design for cross-phase modulation dominated channels
2015 17th International Conference on Transparent Optical Networks (ICTON), 2015Co-Authors: Ivan B. Djordjevic, Mo LiAbstract:An optimal Signal Constellation design (OSCD) algorithm, suitable for WDM systems dominated by cross-phase modulation (XPM), named here XPM-OSCD, will be described in this invited paper, in which the cumulative log-likelihood-function is used as the optimization criterion. Additionally, the collaborative demodulation scheme will be described, compensating for the nonlinear phase noise due to XPM. We will demonstrate by Monte Carlo simulation that 16-ary Constellation obtained by XPM-OSCD algorithm significantly outperforms 16-ary QAM, when non-collaborative demodulation scheme is used. On the other hand, when the collaborative demodulation scheme is used in combination with XPM-OSCD algorithm, we will demonstrate that the transmission distance of conventional QAM can be dramatically extended.
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Multidimensional Signal Constellation design for channel dominated with nonlinear phase noise
2015 12th International Conference on Telecommunication in Modern Satellite Cable and Broadcasting Services (TELSIKS), 2015Co-Authors: Ivan B. Djordjevic, Mo LiAbstract:Multidimensional Signal Constellation sets suitable for nonlinear phase noise dominated channel are proposed, where the cumulative log-likelihood-function is used as the optimization criterion. Also, we demonstrate that our proposed Signal Constellation sets significantly outperform polarization switched QPSK and sphere packing Constellations in 8-ary case and 16-ary case.
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Optimal Signal Constellation design for nonlinear chromatic dispersion optical channel
2015 12th International Conference on Telecommunication in Modern Satellite Cable and Broadcasting Services (TELSIKS), 2015Co-Authors: Velimir M. Ilic, Ivan B. Djordjevic, Tao Liu, Nebojsa Stojanovic, Franko KüppersAbstract:In this paper, we propose an optimal Signal Constellation design algorithm suitable for the coherent optical nonlinear chromatic dispersion channels. The algorithm is a extended version of previously proposed algorithm for self phase modulation channel. Simulation results show significant improvement of bit error rate performances compared to the standard quadrature amplitude modulation format.
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Signal Constellation Design for Cross-Phase Modulation Dominated Channels
IEEE Photonics Journal, 2015Co-Authors: Ivan B. DjordjevicAbstract:In this paper, we introduce an optimal Signal Constellation design algorithm suitable for wavelength-division-multiplexed systems dominated by cross-phase modulation (XPM), which is called XPM-OSCD. Additionally, a corresponding demodulation scheme is also proposed in order to better compensate for the nonlinear phase errors. In this scheme, the cumulative log-likelihood function is used as the optimization criterion. The Signal Constellations obtained by this algorithm significantly outperform conventional quadrature amplitude modulation (QAM).
Ting Wang - One of the best experts on this subject based on the ideXlab platform.
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multidimensional optical transport based on optimized vector quantization inspired Signal Constellation design
IEEE Transactions on Communications, 2014Co-Authors: Ivan B. Djordjevic, Aleksandra Z. Jovanovic, Zoran Peric, Ting WangAbstract:An optimized vector-quantization-inspired Signal Constellation design (OVQ-SCD) suitable for multidimensional optical transport is proposed, in which Signal Constellation radii transformation function is optimized and near-uniform distribution of points is achieved. The proposed OVQ-SCD is used in a tandem with a hybrid multidimensional coded-modulation scheme employing Slepian sequences as electrical discrete-time basis functions, orthogonal prolate spheroidal wave functions as impulse responses of optical filters in orthogonal-division multiplexing, and spatial modes as optical continuous-time basis functions. It has been shown that the proposed multidimensional coded-modulation schemes based on OVQ-SCDs outperform corresponding counterparts and can be used to enable beyond 10 Pb/s serial optical transport over spatial division multiplexing (SDM) fibers as well as beyond 1 Pb/s transport over SMFs. The proposed OVQ-SCD-based hybrid multidimensional coded modulation scheme can simultaneously solve the problems related to the limited bandwidth of information-infrastructure, high energy consumption, and heterogeneity of network segments; while enabling elastic and dynamic bandwidth allocation.
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Optimized vector-quantization-based Signal Constellation design (OVQ-SCD) for multidimensional optical transport
CLEO: 2014, 2014Co-Authors: Ivan B. Djordjevic, Aleksandra Z. Jovanovic, Zoran Peric, Ting WangAbstract:An optimized-vector-quantization-based Signal-Constellation-design (OVQ-SCD) suitable for beyond 1Pb/s serial multidimensional-optical-transport is proposed, in which Signal-Constellation-radii-transformation-function is optimized and near-uniform-distribution of points is achieved.
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Optimal Signal Constellation Design for Ultra-High-Speed Optical Transport in the Presence of Phase Noise
CLEO: 2014, 2014Co-Authors: Tao Liu, Ivan B. Djordjevic, Ting WangAbstract:An optimal Signal Constellation design algorithm suitable for the phase noise channels is proposed, in which the cumulative log-likelihood-function is used as the optimization criterion. The Signal Constellations obtained by this algorithm significantly outperform conventional QAM.
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on the multidimensional Signal Constellation design for few mode fiber based high speed optical transmission
IEEE Photonics Journal, 2012Co-Authors: Ivan B. Djordjevic, Tao Liu, Ting WangAbstract:In this paper, we propose an algorithm to determine the -dimensional optimum Signal Constellation design (DD-OSCD), in minimum mean-square error sense, for channel capacity achieving source distribution. We then describe a -dimensional coded modulation scheme, employing orbital angular momentum modes, two polarization states, and two in-phase/quadrature coordinates, suitable for use in future few-mode fiber (FMF) applications. Monte Carlo simulations indicate that the proposed low-density parity-check (LDPC)-coded polarization-division-multiplexed (PDM) quadrature-multiplexed (QM) DD-OSCD significantly outperforms conventional PDM-QAM (by 4.32 dB for 64-ary 3-D Constellation at a BER of ). In addition, the DD-OSCD outperforms sphere packing Constellations (by 0.33 dB for 8-ary 3-D Constellation at a BER of ).
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Feedback channel capacity inspired optimum Signal Constellation design for high-speed optical transmission
2012 Conference on Lasers and Electro-Optics (CLEO), 2012Co-Authors: Ivan B. Djordjevic, Lei Xu, Ting WangAbstract:In this paper, we describe a feedback channel capacity inspired optimum Signal Constellation design (FCC-OSCD), for channel capacity achieving source distribution. The Constellations obtained by FCC-OSCD are OSNR dependent. We demonstrate by Monte Carlo simulations that 32-ary Signal Constellation, obtained by FCC-OSCD, outperforms previously proposed optimized 32-ary Signal Constellation by 1.2 dB at BER of 10-7.
Zoran Peric - One of the best experts on this subject based on the ideXlab platform.
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multidimensional optical transport based on optimized vector quantization inspired Signal Constellation design
IEEE Transactions on Communications, 2014Co-Authors: Ivan B. Djordjevic, Aleksandra Z. Jovanovic, Zoran Peric, Ting WangAbstract:An optimized vector-quantization-inspired Signal Constellation design (OVQ-SCD) suitable for multidimensional optical transport is proposed, in which Signal Constellation radii transformation function is optimized and near-uniform distribution of points is achieved. The proposed OVQ-SCD is used in a tandem with a hybrid multidimensional coded-modulation scheme employing Slepian sequences as electrical discrete-time basis functions, orthogonal prolate spheroidal wave functions as impulse responses of optical filters in orthogonal-division multiplexing, and spatial modes as optical continuous-time basis functions. It has been shown that the proposed multidimensional coded-modulation schemes based on OVQ-SCDs outperform corresponding counterparts and can be used to enable beyond 10 Pb/s serial optical transport over spatial division multiplexing (SDM) fibers as well as beyond 1 Pb/s transport over SMFs. The proposed OVQ-SCD-based hybrid multidimensional coded modulation scheme can simultaneously solve the problems related to the limited bandwidth of information-infrastructure, high energy consumption, and heterogeneity of network segments; while enabling elastic and dynamic bandwidth allocation.
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Optimized vector-quantization-based Signal Constellation design (OVQ-SCD) for multidimensional optical transport
CLEO: 2014, 2014Co-Authors: Ivan B. Djordjevic, Aleksandra Z. Jovanovic, Zoran Peric, Ting WangAbstract:An optimized-vector-quantization-based Signal-Constellation-design (OVQ-SCD) suitable for beyond 1Pb/s serial multidimensional-optical-transport is proposed, in which Signal-Constellation-radii-transformation-function is optimized and near-uniform-distribution of points is achieved.
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Multidimensional Vector Quantization-Based Signal Constellation Design Enabling Beyond 1 Pb/s Serial Optical Transport Networks
IEEE Photonics Journal, 2013Co-Authors: Ivan B. Djordjevic, Aleksandra Z. Jovanovic, Milorad Cvijetic, Zoran PericAbstract:In this paper, we propose a hybrid multidimensional coded-modulation (CM) scheme based on a new multidimensional Signal Constellation design as a solution to limited bandwidth and high energy consumption of information infrastructure. This multidimensional Signal Constellation, herewith called vector-quantization-based Signal Constellation design (VQ-SCD), is based on the vector quantization theory. The proposed scheme employs both the electrical basis functions (in the form of the prolate spheroidal wave functions) and the optical basis functions (in the form of polarization and spatial mode states) as optical basis functions. The proposed coded VQ-SCD scheme is the enabling technology for optical serial transport with bit rates exceeding 1000 Tb/s (1 Pb/s). In addition, the CM scheme we proposed allows for the adaptive, elastic, and dynamic allocation of the bandwidth. This fine granularity bandwidth manipulation is envisioned as a part of future software-defined optical networking.
Tao Liu - One of the best experts on this subject based on the ideXlab platform.
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Optimal Signal Constellation design for nonlinear chromatic dispersion optical channel
2015 12th International Conference on Telecommunication in Modern Satellite Cable and Broadcasting Services (TELSIKS), 2015Co-Authors: Velimir M. Ilic, Ivan B. Djordjevic, Tao Liu, Nebojsa Stojanovic, Franko KüppersAbstract:In this paper, we propose an optimal Signal Constellation design algorithm suitable for the coherent optical nonlinear chromatic dispersion channels. The algorithm is a extended version of previously proposed algorithm for self phase modulation channel. Simulation results show significant improvement of bit error rate performances compared to the standard quadrature amplitude modulation format.
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Optimal Signal Constellation design for ultra-high-speed optical transport in the presence of nonlinear phase noise.
Optics express, 2014Co-Authors: Tao Liu, Ivan B. DjordjevicAbstract:In this paper, we first describe an optimal Signal Constellation design algorithm suitable for the coherent optical channels dominated by the linear phase noise. Then, we modify this algorithm to be suitable for the nonlinear phase noise dominated channels. In optimization procedure, the proposed algorithm uses the cumulative log-likelihood function instead of the Euclidian distance. Further, an LDPC coded modulation scheme is proposed to be used in combination with Signal Constellations obtained by proposed algorithm. Monte Carlo simulations indicate that the LDPC-coded modulation schemes employing the new Constellation sets, obtained by our new Signal Constellation design algorithm, outperform corresponding QAM Constellations significantly in terms of transmission distance and have better nonlinearity tolerance.
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Optimal Signal Constellation Design for Ultra-High-Speed Optical Transport in the Presence of Phase Noise
CLEO: 2014, 2014Co-Authors: Tao Liu, Ivan B. Djordjevic, Ting WangAbstract:An optimal Signal Constellation design algorithm suitable for the phase noise channels is proposed, in which the cumulative log-likelihood-function is used as the optimization criterion. The Signal Constellations obtained by this algorithm significantly outperform conventional QAM.
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on the multidimensional Signal Constellation design for few mode fiber based high speed optical transmission
IEEE Photonics Journal, 2012Co-Authors: Ivan B. Djordjevic, Tao Liu, Ting WangAbstract:In this paper, we propose an algorithm to determine the -dimensional optimum Signal Constellation design (DD-OSCD), in minimum mean-square error sense, for channel capacity achieving source distribution. We then describe a -dimensional coded modulation scheme, employing orbital angular momentum modes, two polarization states, and two in-phase/quadrature coordinates, suitable for use in future few-mode fiber (FMF) applications. Monte Carlo simulations indicate that the proposed low-density parity-check (LDPC)-coded polarization-division-multiplexed (PDM) quadrature-multiplexed (QM) DD-OSCD significantly outperforms conventional PDM-QAM (by 4.32 dB for 64-ary 3-D Constellation at a BER of ). In addition, the DD-OSCD outperforms sphere packing Constellations (by 0.33 dB for 8-ary 3-D Constellation at a BER of ).
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Optimum Signal Constellation design for ultra-high-speed optical transport networks
2012 14th International Conference on Transparent Optical Networks (ICTON), 2012Co-Authors: Ivan B. Djordjevic, Tao Liu, Milorad CvijeticAbstract:In this invited paper we analyze several strategies that can be used facilitate the implementation of 400 GbE and 1 TbE technologies with respect to Signal-Constellation design and propose the use of optimum Signal Constellations instead of conventional QAM scheme. The proposed Signal Constellation designs can be used in combination with large-girth LDPC codes to solve both the bandwidth and energy-efficiency problems of future Ethernet technologies. We further describe several hybrid coded-modulation (CM) schemes that enable multi-terabit serial optical transport, including energy-efficient D-dimensional CM, mode-multiplexed four dimensional CM, and mode-multiplexed generalized-OFDM.
Dan Raphaeli - One of the best experts on this subject based on the ideXlab platform.
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A Signal Constellation for Pilotless Communications Over Wiener Phase Noise Channels
arXiv: Information Theory, 2013Co-Authors: Shachar Shayovitz, Dan RaphaeliAbstract:Many satellite communication systems operating today employ low cost upconverters or downconverters which create phase noise. This noise can severely limit the information rate of the system and pose a serious challenge for the detection systems. Moreover, simple solutions for phase noise tracking such as PLL either require low phase noise or otherwise require many pilot symbols which reduce the effective data rate. In order to increase the effective information rate, we propose a Signal Constellation which does not require pilots, at all, in order to converge in the decoding process. In this contribution, we will present a Signal Constellation which does not require pilot sequences, but we require a Signal that does not present rotational symmetry. For example a simple MPSK cannot be used.Moreover, we will provide a method to analyze the proposed Constellations and provide a figure of merit for their performance when iterative decoding algorithms are used.
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A Signal Constellation for pilotless communications over Wiener phase noise channels
2013 IEEE Global Communications Conference (GLOBECOM), 2013Co-Authors: Shachar Shayovitz, Dan RaphaeliAbstract:In this contribution, we propose a Signal Constellation for the the phase noise channel which does not require pilots thus increasing the effective information rate in a communication system. This Constellation does not present rotational symmetry thus enabling decoding algorithms such as SPA, to converge without the use of pilots. We will provide Bit Error Rate (BER) simulations which show the superiority of this Constellation over standard MPSK with pilots. Moreover, we will provide a method to analyze any arbitrary Signal Constellation and provide a figure of merit for its performance when iterative decoding algorithms are used.
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GLOBECOM - A Signal Constellation for pilotless communications over Wiener phase noise channels
2013 IEEE Global Communications Conference (GLOBECOM), 2013Co-Authors: Shachar Shayovitz, Dan RaphaeliAbstract:In this contribution, we propose a Signal Constellation for the the phase noise channel which does not require pilots thus increasing the effective information rate in a communication system. This Constellation does not present rotational symmetry thus enabling decoding algorithms such as SPA, to converge without the use of pilots. We will provide Bit Error Rate (BER) simulations which show the superiority of this Constellation over standard MPSK with pilots. Moreover, we will provide a method to analyze any arbitrary Signal Constellation and provide a figure of merit for its performance when iterative decoding algorithms are used.