The Experts below are selected from a list of 12207 Experts worldwide ranked by ideXlab platform
Sangkook Han - One of the best experts on this subject based on the ideXlab platform.
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individual stokes vector based sop recovery in co ofdma pon Uplink Transmission
IEEE Photonics Technology Letters, 2018Co-Authors: Soomin Kang, Hyoung Joon Park, Kyounghak Mun, Sangkook HanAbstract:The state of polarization (SOP) is a critical issue faced by the single-wavelength-based orthogonal frequency division multiple-access passive optical networks, because each optical network unit uses different polarization-sensitive optical devices and paths. To compensate SOP variation, an individual Stokes vector-based SOP recovery (ISVSR) technique is proposed. A single pilot-tone-based SOP compensation was individually applied and experimentally verified the effect of the ISVSR technique in the self-coherent reflective passive optical network Uplink Transmission. By employing individual SOP recovery, a root-mean-square compensation error and bit error rate close to zero were experimentally achieved. Consequently, the SOP variation can be quickly and accurately compensated without requiring hardware-based complex polarization control or installation of expensive devices.
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mitigation of timing offset effect in im dd based ofdma pon Uplink multiple access
Optics Express, 2015Co-Authors: Sun Young Jung, Sang Min Jung, Hyoung Joon Park, Sangkook HanAbstract:In orthogonal frequency division multiple access based passive optical network (OFDMA-PON) Uplink, synchronization between optical network units (ONUs) is very important to maintain orthogonality. The synchronization among Uplink signals is considered as one of the main challenges in OFDMA-PON due to optical path difference. In this paper, the performance degradation according to timing offset between ONUs is experimentally analyzed. And we propose and demonstrate timing offset effect reduction in asynchronous multiple access by using CP extension and filter bank based multicarrier (FBMC) system in intensity modulation/direct detection (IM/DD) based OFDMA-PON Uplink Transmission.
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single wavelength ofdma pon Uplink optical beat interference noise reduction using rf clipping tone
International Conference on Optical Internet, 2014Co-Authors: Sang Min Jung, Seungmin Yang, Kyunghak Mun, Sangkook HanAbstract:A novel technique for mitigating the OBI noise in optical OFDMA-PON Uplink Transmission is presented. By using out of signal band RF clipping tone to optical seed carrier, OBI noise has been reduced and resulting throughput and spectral efficiency has been doubled up.
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analysis of optical beat interference noise suppression using rf clipping tone in ofdma pon Uplink Transmission
Microwave and Optical Technology Letters, 2014Co-Authors: Seungmin Yang, Sun Young Jung, Sang Min Jung, Kyounghak Mun, Changhun Kim, Seunghyun Cho, Sangkook HanAbstract:In orthogonal frequency division multiple access-passive optical network (OFDMA-PON) Uplink Transmission with a direct detection system, the optical beat interference (OBI) noise is a very critical issue in regard to channel performance degradation. We have proposed a novel technique to suppress the OBI noise in intensity modulation and direct detection OFDMA-PON links by using an optical spectrum broadening method using the RF-clipping tone to improve the SNR of the discrete multitone modulation (DMT) signal with OBI noise suppression. We also experimentally analyzed the dependency of the RF clipping tone on the OBI noise suppression and dither effect. The results show that the received DMT signal in the optical line terminal can achieve 3 Gb/s over a 23 km SSMF with a BER of 2.3×10−4. © 2014 Wiley Periodicals, Inc. Microwave Opt Technol Lett 56:2706–2711, 2014
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optical beat noise suppression in ofdma pon Uplink Transmission by using rf clipping tone
Conference on Lasers and Electro-Optics, 2014Co-Authors: Sang Min Jung, Sun Young Jung, Seungmin Yang, Sangkook HanAbstract:A technique of suppressing optical beat interference (OBI) noise in OFDMA PON is proposed and verified experimentally by applying RF clipping tone. We achieve reliable 8Gbit/s 20km Uplink Transmission with spectral efficiency 2.7bit/s/Hz.
Sang Min Jung - One of the best experts on this subject based on the ideXlab platform.
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mitigation of timing offset effect in im dd based ofdma pon Uplink multiple access
Optics Express, 2015Co-Authors: Sun Young Jung, Sang Min Jung, Hyoung Joon Park, Sangkook HanAbstract:In orthogonal frequency division multiple access based passive optical network (OFDMA-PON) Uplink, synchronization between optical network units (ONUs) is very important to maintain orthogonality. The synchronization among Uplink signals is considered as one of the main challenges in OFDMA-PON due to optical path difference. In this paper, the performance degradation according to timing offset between ONUs is experimentally analyzed. And we propose and demonstrate timing offset effect reduction in asynchronous multiple access by using CP extension and filter bank based multicarrier (FBMC) system in intensity modulation/direct detection (IM/DD) based OFDMA-PON Uplink Transmission.
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single wavelength ofdma pon Uplink optical beat interference noise reduction using rf clipping tone
International Conference on Optical Internet, 2014Co-Authors: Sang Min Jung, Seungmin Yang, Kyunghak Mun, Sangkook HanAbstract:A novel technique for mitigating the OBI noise in optical OFDMA-PON Uplink Transmission is presented. By using out of signal band RF clipping tone to optical seed carrier, OBI noise has been reduced and resulting throughput and spectral efficiency has been doubled up.
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analysis of optical beat interference noise suppression using rf clipping tone in ofdma pon Uplink Transmission
Microwave and Optical Technology Letters, 2014Co-Authors: Seungmin Yang, Sun Young Jung, Sang Min Jung, Kyounghak Mun, Changhun Kim, Seunghyun Cho, Sangkook HanAbstract:In orthogonal frequency division multiple access-passive optical network (OFDMA-PON) Uplink Transmission with a direct detection system, the optical beat interference (OBI) noise is a very critical issue in regard to channel performance degradation. We have proposed a novel technique to suppress the OBI noise in intensity modulation and direct detection OFDMA-PON links by using an optical spectrum broadening method using the RF-clipping tone to improve the SNR of the discrete multitone modulation (DMT) signal with OBI noise suppression. We also experimentally analyzed the dependency of the RF clipping tone on the OBI noise suppression and dither effect. The results show that the received DMT signal in the optical line terminal can achieve 3 Gb/s over a 23 km SSMF with a BER of 2.3×10−4. © 2014 Wiley Periodicals, Inc. Microwave Opt Technol Lett 56:2706–2711, 2014
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optical beat interference noise reduction by using out of band rf clipping tone signal in remotely fed ofdma pon link
Optics Express, 2014Co-Authors: Sang Min Jung, Seungmin YangAbstract:A novel technique for mitigating the optical beat interference (OBI) noise in an optical orthogonal frequency division multiple access passive optical network (OFDMA-PON) Uplink Transmission is presented. By using an out of signal band RF clipping tone to the optical seed carrier, the OBI noise has been reduced and the resulting throughput and spectral efficiency has been improved. As an experimental verification, we demonstrate that the spectral efficiency of 23 km and 50 km have been doubled in the OFDMA-PON Uplink Transmission.
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optical beat noise suppression in ofdma pon Uplink Transmission by using rf clipping tone
Conference on Lasers and Electro-Optics, 2014Co-Authors: Sang Min Jung, Sun Young Jung, Seungmin Yang, Sangkook HanAbstract:A technique of suppressing optical beat interference (OBI) noise in OFDMA PON is proposed and verified experimentally by applying RF clipping tone. We achieve reliable 8Gbit/s 20km Uplink Transmission with spectral efficiency 2.7bit/s/Hz.
Seungmin Yang - One of the best experts on this subject based on the ideXlab platform.
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single wavelength ofdma pon Uplink optical beat interference noise reduction using rf clipping tone
International Conference on Optical Internet, 2014Co-Authors: Sang Min Jung, Seungmin Yang, Kyunghak Mun, Sangkook HanAbstract:A novel technique for mitigating the OBI noise in optical OFDMA-PON Uplink Transmission is presented. By using out of signal band RF clipping tone to optical seed carrier, OBI noise has been reduced and resulting throughput and spectral efficiency has been doubled up.
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analysis of optical beat interference noise suppression using rf clipping tone in ofdma pon Uplink Transmission
Microwave and Optical Technology Letters, 2014Co-Authors: Seungmin Yang, Sun Young Jung, Sang Min Jung, Kyounghak Mun, Changhun Kim, Seunghyun Cho, Sangkook HanAbstract:In orthogonal frequency division multiple access-passive optical network (OFDMA-PON) Uplink Transmission with a direct detection system, the optical beat interference (OBI) noise is a very critical issue in regard to channel performance degradation. We have proposed a novel technique to suppress the OBI noise in intensity modulation and direct detection OFDMA-PON links by using an optical spectrum broadening method using the RF-clipping tone to improve the SNR of the discrete multitone modulation (DMT) signal with OBI noise suppression. We also experimentally analyzed the dependency of the RF clipping tone on the OBI noise suppression and dither effect. The results show that the received DMT signal in the optical line terminal can achieve 3 Gb/s over a 23 km SSMF with a BER of 2.3×10−4. © 2014 Wiley Periodicals, Inc. Microwave Opt Technol Lett 56:2706–2711, 2014
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optical beat interference noise reduction by using out of band rf clipping tone signal in remotely fed ofdma pon link
Optics Express, 2014Co-Authors: Sang Min Jung, Seungmin YangAbstract:A novel technique for mitigating the optical beat interference (OBI) noise in an optical orthogonal frequency division multiple access passive optical network (OFDMA-PON) Uplink Transmission is presented. By using an out of signal band RF clipping tone to the optical seed carrier, the OBI noise has been reduced and the resulting throughput and spectral efficiency has been improved. As an experimental verification, we demonstrate that the spectral efficiency of 23 km and 50 km have been doubled in the OFDMA-PON Uplink Transmission.
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optical beat noise suppression in ofdma pon Uplink Transmission by using rf clipping tone
Conference on Lasers and Electro-Optics, 2014Co-Authors: Sang Min Jung, Sun Young Jung, Seungmin Yang, Sangkook HanAbstract:A technique of suppressing optical beat interference (OBI) noise in OFDMA PON is proposed and verified experimentally by applying RF clipping tone. We achieve reliable 8Gbit/s 20km Uplink Transmission with spectral efficiency 2.7bit/s/Hz.
Sun Young Jung - One of the best experts on this subject based on the ideXlab platform.
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mitigation of timing offset effect in im dd based ofdma pon Uplink multiple access
Optics Express, 2015Co-Authors: Sun Young Jung, Sang Min Jung, Hyoung Joon Park, Sangkook HanAbstract:In orthogonal frequency division multiple access based passive optical network (OFDMA-PON) Uplink, synchronization between optical network units (ONUs) is very important to maintain orthogonality. The synchronization among Uplink signals is considered as one of the main challenges in OFDMA-PON due to optical path difference. In this paper, the performance degradation according to timing offset between ONUs is experimentally analyzed. And we propose and demonstrate timing offset effect reduction in asynchronous multiple access by using CP extension and filter bank based multicarrier (FBMC) system in intensity modulation/direct detection (IM/DD) based OFDMA-PON Uplink Transmission.
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analysis of optical beat interference noise suppression using rf clipping tone in ofdma pon Uplink Transmission
Microwave and Optical Technology Letters, 2014Co-Authors: Seungmin Yang, Sun Young Jung, Sang Min Jung, Kyounghak Mun, Changhun Kim, Seunghyun Cho, Sangkook HanAbstract:In orthogonal frequency division multiple access-passive optical network (OFDMA-PON) Uplink Transmission with a direct detection system, the optical beat interference (OBI) noise is a very critical issue in regard to channel performance degradation. We have proposed a novel technique to suppress the OBI noise in intensity modulation and direct detection OFDMA-PON links by using an optical spectrum broadening method using the RF-clipping tone to improve the SNR of the discrete multitone modulation (DMT) signal with OBI noise suppression. We also experimentally analyzed the dependency of the RF clipping tone on the OBI noise suppression and dither effect. The results show that the received DMT signal in the optical line terminal can achieve 3 Gb/s over a 23 km SSMF with a BER of 2.3×10−4. © 2014 Wiley Periodicals, Inc. Microwave Opt Technol Lett 56:2706–2711, 2014
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optical beat noise suppression in ofdma pon Uplink Transmission by using rf clipping tone
Conference on Lasers and Electro-Optics, 2014Co-Authors: Sang Min Jung, Sun Young Jung, Seungmin Yang, Sangkook HanAbstract:A technique of suppressing optical beat interference (OBI) noise in OFDMA PON is proposed and verified experimentally by applying RF clipping tone. We achieve reliable 8Gbit/s 20km Uplink Transmission with spectral efficiency 2.7bit/s/Hz.
Vincent H Poor - One of the best experts on this subject based on the ideXlab platform.
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on the design of mimo noma downlink and Uplink Transmission
International Conference on Communications, 2016Co-Authors: Zhiguo Ding, Robert Schober, Vincent H PoorAbstract:In this paper, a novel MIMO-NOMA framework for downlink and Uplink Transmission is proposed by applying the concept of signal alignment. By using stochastic geometry, closed-form analytical results are developed to facilitate the performance evaluation of the proposed framework for randomly deployed users and interferers. The impact of different power allocation strategies, such as fixed power allocation and cognitive radio inspired power allocation, on the performance of MIMO-NOMA is also investigated. Computer simulation results are provided to demonstrate the performance of the proposed framework and the accuracy of the developed analytical results.
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a general mimo framework for noma downlink and Uplink Transmission based on signal alignment
IEEE Transactions on Wireless Communications, 2016Co-Authors: Zhiguo Ding, Robert Schober, Vincent H PoorAbstract:The application of multiple-input multiple-output (MIMO) techniques to nonorthogonal multiple access (NOMA) systems is important to enhance the performance gains of NOMA. In this paper, a novel MIMO-NOMA framework for downlink and Uplink Transmission is proposed by applying the concept of signal alignment. By using stochastic geometry, closed-form analytical results are developed to facilitate the performance evaluation of the proposed framework for randomly deployed users and interferers. The impact of different power allocation strategies, namely fixed power allocation and cognitive radio inspired power allocation, on the performance of MIMO-NOMA is also investigated. Computer simulation results are provided to demonstrate the performance of the proposed framework and the accuracy of the developed analytical results.
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a general mimo framework for noma downlink and Uplink Transmission based on signal alignment
arXiv: Information Theory, 2015Co-Authors: Zhiguo Ding, Robert Schober, Vincent H PoorAbstract:The application of multiple-input multiple-output (MIMO) techniques to non-orthogonal multiple access (NOMA) systems is important to enhance the performance gains of NOMA. In this paper, a novel MIMO-NOMA framework for downlink and Uplink Transmission is proposed by applying the concept of signal alignment. By using stochastic geometry, closed-form analytical results are developed to facilitate the performance evaluation of the proposed framework for randomly deployed users and interferers. The impact of different power allocation strategies, such as fixed power allocation and cognitive radio inspired power allocation, on the performance of MIMO-NOMA is also investigated. Computer simulation results are provided to demonstrate the performance of the proposed framework and the accuracy of the developed analytical results.
