The Experts below are selected from a list of 360 Experts worldwide ranked by ideXlab platform
Zhiping Zhang - One of the best experts on this subject based on the ideXlab platform.
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demonstration of hybrid overlay underlay Waveform Generator with spectrally compliant cognitive capability via sd smse framework
Consumer Communications and Networking Conference, 2016Co-Authors: Paul Rose, Ruolin Zhou, Vasu Chakarvarthy, Yang Qu, Zhiqiang Wu, Zhiping ZhangAbstract:In this paper, a software defined radio (SDR) based Waveform Generator platform with spectrally compliant cognitive capability for cognitive radio (CR) and dynamic spectrum access (DSA) network is demonstrated. In our previous work, an overlay CR has been demonstrated via a spectrally modulated spectrally encoded (SMSE) framework to autonomously stitch unused spectrum fragments and transmit over non-contiguous frequency bands in a dynamically changing environment. Such an overlay CR can coexist with primary users (PUs) and other secondary users (SUs) without harmful interference by turning off the subcarriers which are shared with active PUs and other SUs on the band. To further enhance spectrum usage, we extend it and implement a hybrid overlay/underlay Waveform Generator via a soft-decision SMSE (SD-SMSE) framework, where both unused and under-used spectra are explored. Specifically, the hybrid overlay/underlay Waveform can transmit over not only unused spectrum bands, but also under-used spectrum and share the spectrum with active PUs and other SUs by underlaying them, since PU/SU has certain capability to tolerant interference as long as the underlay transmission power is lower than such a interference tolerance level (ITL). On the other hand, if any active SU on the band is not a friendly transmission, the hybrid Waveform can easily increase the transmission power underlaying with the SU much higher than the ITL to fully disrupt the unfriendly transmission. Moreover, the proposed platform is capable of generating conventional single-carrier Waveform with different modulation schemes and radio frequency (RF) parameters. Therefore, the platform implements many desirable functions, realizes coexistence with PUs and other SUs or unfriendly transmission disruption, and maximizes the spectrum efficiency, as well as provides a testbed for cognitive radio and cognitive RF research and development.
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demonstration of hybrid overlay underlay Waveform Generator with spectrally compliant cognitive capability via sd smse framework
Consumer Communications and Networking Conference, 2016Co-Authors: Paul Rose, Ruolin Zhou, Vasu Chakarvarthy, Yang Qu, Zhiqiang Wu, Zhiping ZhangAbstract:In this paper, a software defined radio (SDR) based Waveform Generator platform with spectrally compliant cognitive capability for cognitive radio (CR) and dynamic spectrum access (DSA) network is demonstrated. In our previous work, an overlay CR has been demonstrated via a spectrally modulated spectrally encoded (SMSE) framework to autonomously stitch unused spectrum fragments and transmit over non-contiguous frequency bands in a dynamically changing environment. Such an overlay CR can coexist with primary users (PUs) and other secondary users (SUs) without harmful interference by turning off the subcarriers which are shared with active PUs and other SUs on the band. To further enhance spectrum usage, we extend it and implement a hybrid overlay/underlay Waveform Generator via a soft-decision SMSE (SD-SMSE) framework, where both unused and under-used spectra are explored. Specifically, the hybrid overlay/underlay Waveform can transmit over not only unused spectrum bands, but also under-used spectrum and share the spectrum with active PUs and other SUs by underlaying them, since PU/SU has certain capability to tolerant interference as long as the underlay transmission power is lower than such a interference tolerance level (ITL). On the other hand, if any active SU on the band is not a friendly transmission, the hybrid Waveform can easily increase the transmission power underlaying with the SU much higher than the ITL to fully disrupt the unfriendly transmission. Moreover, the proposed platform is capable of generating conventional single-carrier Waveform with different modulation schemes and radio frequency (RF) parameters. Therefore, the platform implements many desirable functions, realizes coexistence with PUs and other SUs or unfriendly transmission disruption, and maximizes the spectrum efficiency, as well as provides a testbed for cognitive radio and cognitive RF research and development.
Paul Rose - One of the best experts on this subject based on the ideXlab platform.
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demonstration of hybrid overlay underlay Waveform Generator with spectrally compliant cognitive capability via sd smse framework
Consumer Communications and Networking Conference, 2016Co-Authors: Paul Rose, Ruolin Zhou, Vasu Chakarvarthy, Yang Qu, Zhiqiang Wu, Zhiping ZhangAbstract:In this paper, a software defined radio (SDR) based Waveform Generator platform with spectrally compliant cognitive capability for cognitive radio (CR) and dynamic spectrum access (DSA) network is demonstrated. In our previous work, an overlay CR has been demonstrated via a spectrally modulated spectrally encoded (SMSE) framework to autonomously stitch unused spectrum fragments and transmit over non-contiguous frequency bands in a dynamically changing environment. Such an overlay CR can coexist with primary users (PUs) and other secondary users (SUs) without harmful interference by turning off the subcarriers which are shared with active PUs and other SUs on the band. To further enhance spectrum usage, we extend it and implement a hybrid overlay/underlay Waveform Generator via a soft-decision SMSE (SD-SMSE) framework, where both unused and under-used spectra are explored. Specifically, the hybrid overlay/underlay Waveform can transmit over not only unused spectrum bands, but also under-used spectrum and share the spectrum with active PUs and other SUs by underlaying them, since PU/SU has certain capability to tolerant interference as long as the underlay transmission power is lower than such a interference tolerance level (ITL). On the other hand, if any active SU on the band is not a friendly transmission, the hybrid Waveform can easily increase the transmission power underlaying with the SU much higher than the ITL to fully disrupt the unfriendly transmission. Moreover, the proposed platform is capable of generating conventional single-carrier Waveform with different modulation schemes and radio frequency (RF) parameters. Therefore, the platform implements many desirable functions, realizes coexistence with PUs and other SUs or unfriendly transmission disruption, and maximizes the spectrum efficiency, as well as provides a testbed for cognitive radio and cognitive RF research and development.
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demonstration of hybrid overlay underlay Waveform Generator with spectrally compliant cognitive capability via sd smse framework
Consumer Communications and Networking Conference, 2016Co-Authors: Paul Rose, Ruolin Zhou, Vasu Chakarvarthy, Yang Qu, Zhiqiang Wu, Zhiping ZhangAbstract:In this paper, a software defined radio (SDR) based Waveform Generator platform with spectrally compliant cognitive capability for cognitive radio (CR) and dynamic spectrum access (DSA) network is demonstrated. In our previous work, an overlay CR has been demonstrated via a spectrally modulated spectrally encoded (SMSE) framework to autonomously stitch unused spectrum fragments and transmit over non-contiguous frequency bands in a dynamically changing environment. Such an overlay CR can coexist with primary users (PUs) and other secondary users (SUs) without harmful interference by turning off the subcarriers which are shared with active PUs and other SUs on the band. To further enhance spectrum usage, we extend it and implement a hybrid overlay/underlay Waveform Generator via a soft-decision SMSE (SD-SMSE) framework, where both unused and under-used spectra are explored. Specifically, the hybrid overlay/underlay Waveform can transmit over not only unused spectrum bands, but also under-used spectrum and share the spectrum with active PUs and other SUs by underlaying them, since PU/SU has certain capability to tolerant interference as long as the underlay transmission power is lower than such a interference tolerance level (ITL). On the other hand, if any active SU on the band is not a friendly transmission, the hybrid Waveform can easily increase the transmission power underlaying with the SU much higher than the ITL to fully disrupt the unfriendly transmission. Moreover, the proposed platform is capable of generating conventional single-carrier Waveform with different modulation schemes and radio frequency (RF) parameters. Therefore, the platform implements many desirable functions, realizes coexistence with PUs and other SUs or unfriendly transmission disruption, and maximizes the spectrum efficiency, as well as provides a testbed for cognitive radio and cognitive RF research and development.
Bingkun Zhou - One of the best experts on this subject based on the ideXlab platform.
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Novel photonic radio-frequency arbitrary Waveform generation based on photonic digital-to-analog conversion with pulse carving
2015 Conference on Lasers and Electro-Optics (CLEO), 2015Co-Authors: Jinxin Liao, Shangyuan Li, Xiaoping Zheng, Hanyi Zhang, Boyu Chen, Xiao Yang, Bingkun ZhouAbstract:We firstly propose a photonic radio-frequency arbitrary Waveform Generator based on photonic digital-to-analog conversion with pulse carving, and demonstrate 10GS/s 4-bit resolution arbitrary Waveform generations with 15GHz and 30GHz up-converting.
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a time domain photonic arbitrary Waveform Generator
Optics Express, 2012Co-Authors: Jinxin Liao, Xiaoping Zheng, Hanyi Zhang, He Wen, Bingkun ZhouAbstract:A time domain photonic arbitrary Waveform Generator (PAWG) scheme based on multi-wavelength optical differential quadrature phase shift keying modulation in combination with differential detection is proposed and experimentally demonstrated. The time domain method shows advantages of large time-bandwidth product, good flexibility, fast Waveform refreshing rate, and high Waveform quality over the frequency domain method. In contrast with other proposed time domain PAWGs or photonic digital-to-analog converters, our PAWG proposal shows a greater dynamic range and a larger noise margin due to its bipolar output, and possesses good scalabilities both in resolution and sampling rate. Assisted with the integration technology, this PAWG presents a good prospect for broad range practical applications in future.
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optical arbitrary Waveform Generator applicable to pulse generation and chromatic dispersion compensation of a remote uwb over fiber system
Optics Express, 2011Co-Authors: Xin Zhou, Xiaoping Zheng, Hanyi Zhang, Bingkun ZhouAbstract:Optical arbitrary Waveform Generator (OAWG), which can generate pre-distorted ultra-wideband (UWB) pulses to tolerate the chromatic dispersion (CD) of the fiber without any other CD compensation solutions, provides a good solution for the UWB over fiber system. In our paper, we experimentally demonstrate a new OAWG scheme based on multiple incoherent continuous wave lights by double side band with suppressed carrier (DSB-SC) modulation. UWB Gaussian monocycle and doublet pulses are generated and the chromatic dispersion of 20-km, 50-km and 100-km single-mode fiber (SMF) are compensated by the OAWG system without any other CD compensation solutions.
Victor Torrescompany - One of the best experts on this subject based on the ideXlab platform.
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multichannel radio frequency arbitrary Waveform generation based on multiwavelength comb switching and 2 d line by line pulse shaping
IEEE Photonics Technology Letters, 2012Co-Authors: Victor Torrescompany, Andrew J Metcalf, Daniel E Leaird, Andrew M WeinerAbstract:We demonstrate a multichannel time-multiplexed radio-frequency arbitrary Waveform Generator. The system combines a switching scheme of multiwavelength optical frequency combs with a novel 2-D line-by-line pulse shaper featuring broad bandwidth operation over large temporal windows. Switching times within a clock period of 200 ps among the four channels is successfully achieved. With finer pulse shaper resolution, the number of channels can be scaled up without increasing the number of switching components.
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radio frequency Waveform Generator with time multiplexing capabilities based on multi wavelength pulse compression
Optics Express, 2009Co-Authors: Victor Torrescompany, Lawrence R ChenAbstract:We demonstrate a new photonically assisted reconfigurable radio-frequency Waveform Generator. The setup is based on phase modulating a multi-wavelength pulse source and subsequent compression in a dispersive medium. Under the appropriate conditions, we show that the photodetected electrical signal is broadband and coherent. Specifically, we show that this system allows for the synthesis of a reconfigurable finite-impulse-response filter where the number of filter taps is given by the number of wavelengths available from the multi-wavelength source and the reconfiguration is determined simply by their power and wavelength separation. We also show that this technique allows for time-multiplexing the synthesized Waveforms, thus leading to an effective switching speed fixed by the clock rate. In particular, we show transitions between synthesized Waveforms with a frequency content > 60 GHz in periods shorter than 100 ps.
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20 ghz arbitrary radio frequency Waveform Generator based on incoherent pulse shaping
Optics Express, 2008Co-Authors: Victor Torrescompany, Jesus Lancis, Pedro Andres, Lawrence R ChenAbstract:We demonstrate a new approach of photonically assisted radio-frequency (RF) Waveform generation using a spectrally incoherent light source. The system is based on the so-called generalized frequency-to-time mapping operation. In this work, external modulation of the source is done by concatenating two electro-optic Mach-Zehnder modulators properly biased to achieve short pulse gates which allow for broad bandwidth electrical signals. Also, the spectral shaping stage is performed prior to O/E conversion. A detailed theoretical analysis demonstrates that even in this case the frequency-to-time mapping is preserved. The key is that the noise level is greatly reduced because the amplitude filter serves as noise rejecter. Experimental results show up to ~20 GHz electrical bandwidth signals using 10 Gb/s standard telecommunication equipment with the nice feature of repetition rate control on the generated electrical Waveform.
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arbitrary Waveform Generator based on all incoherent pulse shaping
IEEE Photonics Technology Letters, 2006Co-Authors: Victor Torrescompany, Jesus Lancis, Pedro AndresAbstract:An all-incoherent technique for the generation of arbitrary electromagnetic intensity profiles is presented. It is based on spectral filtering of a broadband continuous-wave light source so that the filtered spectral density function (SDF) becomes the user-defined Waveform. After large temporal modulation and subsequent distortion in a first-order dispersive medium, the incoherent mapping of the filtered SDF to the time domain occurs. Finally, optical-to-electrical conversion in a fast photodiode allows the optical intensity to be mapped into the electrical domain
Ruolin Zhou - One of the best experts on this subject based on the ideXlab platform.
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demonstration of hybrid overlay underlay Waveform Generator with spectrally compliant cognitive capability via sd smse framework
Consumer Communications and Networking Conference, 2016Co-Authors: Paul Rose, Ruolin Zhou, Vasu Chakarvarthy, Yang Qu, Zhiqiang Wu, Zhiping ZhangAbstract:In this paper, a software defined radio (SDR) based Waveform Generator platform with spectrally compliant cognitive capability for cognitive radio (CR) and dynamic spectrum access (DSA) network is demonstrated. In our previous work, an overlay CR has been demonstrated via a spectrally modulated spectrally encoded (SMSE) framework to autonomously stitch unused spectrum fragments and transmit over non-contiguous frequency bands in a dynamically changing environment. Such an overlay CR can coexist with primary users (PUs) and other secondary users (SUs) without harmful interference by turning off the subcarriers which are shared with active PUs and other SUs on the band. To further enhance spectrum usage, we extend it and implement a hybrid overlay/underlay Waveform Generator via a soft-decision SMSE (SD-SMSE) framework, where both unused and under-used spectra are explored. Specifically, the hybrid overlay/underlay Waveform can transmit over not only unused spectrum bands, but also under-used spectrum and share the spectrum with active PUs and other SUs by underlaying them, since PU/SU has certain capability to tolerant interference as long as the underlay transmission power is lower than such a interference tolerance level (ITL). On the other hand, if any active SU on the band is not a friendly transmission, the hybrid Waveform can easily increase the transmission power underlaying with the SU much higher than the ITL to fully disrupt the unfriendly transmission. Moreover, the proposed platform is capable of generating conventional single-carrier Waveform with different modulation schemes and radio frequency (RF) parameters. Therefore, the platform implements many desirable functions, realizes coexistence with PUs and other SUs or unfriendly transmission disruption, and maximizes the spectrum efficiency, as well as provides a testbed for cognitive radio and cognitive RF research and development.
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demonstration of hybrid overlay underlay Waveform Generator with spectrally compliant cognitive capability via sd smse framework
Consumer Communications and Networking Conference, 2016Co-Authors: Paul Rose, Ruolin Zhou, Vasu Chakarvarthy, Yang Qu, Zhiqiang Wu, Zhiping ZhangAbstract:In this paper, a software defined radio (SDR) based Waveform Generator platform with spectrally compliant cognitive capability for cognitive radio (CR) and dynamic spectrum access (DSA) network is demonstrated. In our previous work, an overlay CR has been demonstrated via a spectrally modulated spectrally encoded (SMSE) framework to autonomously stitch unused spectrum fragments and transmit over non-contiguous frequency bands in a dynamically changing environment. Such an overlay CR can coexist with primary users (PUs) and other secondary users (SUs) without harmful interference by turning off the subcarriers which are shared with active PUs and other SUs on the band. To further enhance spectrum usage, we extend it and implement a hybrid overlay/underlay Waveform Generator via a soft-decision SMSE (SD-SMSE) framework, where both unused and under-used spectra are explored. Specifically, the hybrid overlay/underlay Waveform can transmit over not only unused spectrum bands, but also under-used spectrum and share the spectrum with active PUs and other SUs by underlaying them, since PU/SU has certain capability to tolerant interference as long as the underlay transmission power is lower than such a interference tolerance level (ITL). On the other hand, if any active SU on the band is not a friendly transmission, the hybrid Waveform can easily increase the transmission power underlaying with the SU much higher than the ITL to fully disrupt the unfriendly transmission. Moreover, the proposed platform is capable of generating conventional single-carrier Waveform with different modulation schemes and radio frequency (RF) parameters. Therefore, the platform implements many desirable functions, realizes coexistence with PUs and other SUs or unfriendly transmission disruption, and maximizes the spectrum efficiency, as well as provides a testbed for cognitive radio and cognitive RF research and development.
