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Chongfu Zhang - One of the best experts on this subject based on the ideXlab platform.
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line of sight millimeter wave communications using orbital angular momentum Multiplexing combined with conventional spatial Multiplexing
IEEE Transactions on Wireless Communications, 2017Co-Authors: Yongxiong Ren, Yinwen Cao, Nisar Ahmed, Long Li, Guodong Xie, Peicheng Liao, Hao Huang, Yan Yan, Zhe Zhao, Chongfu ZhangAbstract:Line-of-sight wireless communications can benefit from the simultaneous transmission of multiple independent data streams through the same medium in order to increase system capacity. A common approach is to use conventional spatial Multiplexing with spatially separated transmitter/receiver antennae, for which inter-channel crosstalk is reduced by employing multiple-input-multiple-output (MIMO) signal processing at the receivers. Another fairly recent approach to transmitting multiple data streams is to use orbital-angular-momentum (OAM) Multiplexing, which employs the orthogonality among OAM beams to minimize inter-channel crosstalk and enable efficient (de)Multiplexing. In this paper, we explore the potential of utilizing both of these Multiplexing techniques to provide system design flexibility and performance enhancement. We demonstrate a 16 Gbit/s millimeter-wave link using OAM Multiplexing combined with conventional spatial Multiplexing over a short link distance of 1.8 meters (shorter than Rayleigh distance). Specifically, we implement a spatial Multiplexing system with a $2\times 2$ antenna aperture architecture, in which each transmitter aperture contains two multiplexed 4 Gbit/s data-carrying OAM beams. A MIMO-based signal processing is used at the receiver to mitigate channel interference. Our experimental results show performance improvements for all channels after MIMO processing, with bit-error rates of each channel below the forward error correction limit of $3.8\times 10^{-3}$ . We also simulate the capacity for both the $4\times 4$ MIMO system and the $2\times 2$ MIMO with OAM Multiplexing. Our work indicates that OAM Multiplexing and conventional spatial Multiplexing can be simultaneously utilized to provide design flexibility. The combination of these two approaches can potentially enhance system capacity given a fixed aperture area of the transmitter/receiver (when the link distance is within a few Rayleigh distances).
Yongxiong Ren - One of the best experts on this subject based on the ideXlab platform.
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line of sight millimeter wave communications using orbital angular momentum Multiplexing combined with conventional spatial Multiplexing
IEEE Transactions on Wireless Communications, 2017Co-Authors: Yongxiong Ren, Yinwen Cao, Nisar Ahmed, Long Li, Guodong Xie, Peicheng Liao, Hao Huang, Yan Yan, Zhe Zhao, Chongfu ZhangAbstract:Line-of-sight wireless communications can benefit from the simultaneous transmission of multiple independent data streams through the same medium in order to increase system capacity. A common approach is to use conventional spatial Multiplexing with spatially separated transmitter/receiver antennae, for which inter-channel crosstalk is reduced by employing multiple-input-multiple-output (MIMO) signal processing at the receivers. Another fairly recent approach to transmitting multiple data streams is to use orbital-angular-momentum (OAM) Multiplexing, which employs the orthogonality among OAM beams to minimize inter-channel crosstalk and enable efficient (de)Multiplexing. In this paper, we explore the potential of utilizing both of these Multiplexing techniques to provide system design flexibility and performance enhancement. We demonstrate a 16 Gbit/s millimeter-wave link using OAM Multiplexing combined with conventional spatial Multiplexing over a short link distance of 1.8 meters (shorter than Rayleigh distance). Specifically, we implement a spatial Multiplexing system with a $2\times 2$ antenna aperture architecture, in which each transmitter aperture contains two multiplexed 4 Gbit/s data-carrying OAM beams. A MIMO-based signal processing is used at the receiver to mitigate channel interference. Our experimental results show performance improvements for all channels after MIMO processing, with bit-error rates of each channel below the forward error correction limit of $3.8\times 10^{-3}$ . We also simulate the capacity for both the $4\times 4$ MIMO system and the $2\times 2$ MIMO with OAM Multiplexing. Our work indicates that OAM Multiplexing and conventional spatial Multiplexing can be simultaneously utilized to provide design flexibility. The combination of these two approaches can potentially enhance system capacity given a fixed aperture area of the transmitter/receiver (when the link distance is within a few Rayleigh distances).
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100 tbit s free space data link using orbital angular momentum mode division Multiplexing combined with wavelength division Multiplexing
Optical Fiber Communication Conference, 2013Co-Authors: Hao Huang, Yongxiong Ren, Nisar Ahmed, Guodong Xie, Yan Yan, Yang Yue, D Rogawski, Moshe Tur, Baris I Erkmen, Kevin M BirnbaumAbstract:Multiplexing/deMultiplexing of 1008 data channels using orbital angular momentum (OAM) mode-division-Multiplexing combined with wavelength-division-Multiplexing is demonstrated. 24 OAM modes, each carrying 42 wavelengths, and each wavelength transporting a 100 Gbit/s QPSK signal, are multiplexed, with an aggregated capacity of 100.8 Tbit/s.
J.n. Elgin - One of the best experts on this subject based on the ideXlab platform.
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Incompatibility of polarization-division Multiplexing with wavelength-division Multiplexing in soliton-transmission systems.
Optics Letters, 1998Co-Authors: J. P. Silmon-clyde, J.n. ElginAbstract:In a recent experiment it was demonstrated that polarization-division Multiplexing was incompatible with wavelength-division Multiplexing. We discuss a theoretical model that explains this result.
Xiaocong Yuan - One of the best experts on this subject based on the ideXlab platform.
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massive individual orbital angular momentum channels for Multiplexing enabled by dammann gratings
Light-Science & Applications, 2015Co-Authors: Ting Lei, Meng Zhang, Ping Jia, Gordon Ning Liu, Changjun Min, Jiao Lin, Hanben Niu, Xiaocong YuanAbstract:Data transmission rates in optical communication systems are approaching the limits of conventional Multiplexing methods. Orbital angular momentum (OAM) in optical vortex beams offers a new degree of freedom and the potential to increase the capacity of free-space optical communication systems, with OAM beams acting as information carriers for OAM division Multiplexing (OAM-DM). We demonstrate independent collinear OAM channel generation, transmission and simultaneous detection using Dammann optical vortex gratings (DOVGs). We achieve 80/160 Tbit s−1 capacity with uniform power distributions along all channels, with 1600 individually modulated quadrature phase-shift keying (QPSK)/16-QAM data channels multiplexed by 10 OAM states, 80 wavelengths and two polarizations. DOVG-enabled OAM Multiplexing technology removes the bottleneck of massive OAM state parallel detection and offers an opportunity to raise optical communication systems capacity to Pbit s−1 level. Dammann gratings are used to realize Multiplexing based on the generation, transmission and detection of optical angular momentum (OAM). The OAM of optical vortex beams offers a new degree of freedom for Multiplexing and hence the promise of higher data communication rates, but massive parallel detection of OAM states has proved challenging. Now, researchers in China, Australia and Singapore have used Dammann optical vortex gratings (DOVGs) to realize Multiplexing of massive OAM channels with individual modulation and simultaneous detection capabilities. They achieved a data capacity of 80 Tbit s−1 by Multiplexing 1600 channels using ten OAM states, 80 wavelengths and two polarizations. This DOVG-enabled OAM Multiplexing technology removes the bottleneck of massive parallel detection of OAM states and has the potential to increase optical communication capacities to the Pbit s−1 level.
Hao Huang - One of the best experts on this subject based on the ideXlab platform.
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line of sight millimeter wave communications using orbital angular momentum Multiplexing combined with conventional spatial Multiplexing
IEEE Transactions on Wireless Communications, 2017Co-Authors: Yongxiong Ren, Yinwen Cao, Nisar Ahmed, Long Li, Guodong Xie, Peicheng Liao, Hao Huang, Yan Yan, Zhe Zhao, Chongfu ZhangAbstract:Line-of-sight wireless communications can benefit from the simultaneous transmission of multiple independent data streams through the same medium in order to increase system capacity. A common approach is to use conventional spatial Multiplexing with spatially separated transmitter/receiver antennae, for which inter-channel crosstalk is reduced by employing multiple-input-multiple-output (MIMO) signal processing at the receivers. Another fairly recent approach to transmitting multiple data streams is to use orbital-angular-momentum (OAM) Multiplexing, which employs the orthogonality among OAM beams to minimize inter-channel crosstalk and enable efficient (de)Multiplexing. In this paper, we explore the potential of utilizing both of these Multiplexing techniques to provide system design flexibility and performance enhancement. We demonstrate a 16 Gbit/s millimeter-wave link using OAM Multiplexing combined with conventional spatial Multiplexing over a short link distance of 1.8 meters (shorter than Rayleigh distance). Specifically, we implement a spatial Multiplexing system with a $2\times 2$ antenna aperture architecture, in which each transmitter aperture contains two multiplexed 4 Gbit/s data-carrying OAM beams. A MIMO-based signal processing is used at the receiver to mitigate channel interference. Our experimental results show performance improvements for all channels after MIMO processing, with bit-error rates of each channel below the forward error correction limit of $3.8\times 10^{-3}$ . We also simulate the capacity for both the $4\times 4$ MIMO system and the $2\times 2$ MIMO with OAM Multiplexing. Our work indicates that OAM Multiplexing and conventional spatial Multiplexing can be simultaneously utilized to provide design flexibility. The combination of these two approaches can potentially enhance system capacity given a fixed aperture area of the transmitter/receiver (when the link distance is within a few Rayleigh distances).
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100 tbit s free space data link using orbital angular momentum mode division Multiplexing combined with wavelength division Multiplexing
Optical Fiber Communication Conference, 2013Co-Authors: Hao Huang, Yongxiong Ren, Nisar Ahmed, Guodong Xie, Yan Yan, Yang Yue, D Rogawski, Moshe Tur, Baris I Erkmen, Kevin M BirnbaumAbstract:Multiplexing/deMultiplexing of 1008 data channels using orbital angular momentum (OAM) mode-division-Multiplexing combined with wavelength-division-Multiplexing is demonstrated. 24 OAM modes, each carrying 42 wavelengths, and each wavelength transporting a 100 Gbit/s QPSK signal, are multiplexed, with an aggregated capacity of 100.8 Tbit/s.