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Predictive Tracking Implementation for Mobile Communication Using Programmable Metasurface

China Communications 2023年第8期20卷 137-152页

作者： Yueheng Li Sven Bettinga Lucas Giroto de Oliveira Mohamad Basim Alabd Joerg Eisenbeis Xiang Wan Xueyun Long Tiejun Cui thomas zwick Institute of Radio Frequency Engineering and Electronics(IHE) Karlsruhe Institute of TechnologyKarlsruhe 76131Germany Southeast University Nanjing 211100China

The programmable metasurface(PM)is an antenna array architecture that realizes flexible beam *** functionality is achieved by controlling the unit cells designed with micro components such as positive-intrinsic-negative(PIN)diodes,which offers potential cost reductions in the next generation wireless communication *** PM has been a popular topic in antenna design,its implementations in real-time systems accompanied by signal processing algorithms are *** this paper,novel predictive tracking algorithms for mobile communication scenarios using a PM are created and implemented in a real-time system operating at 28 *** angular speed prediction(ASP)algorithm is proposed to compute the position of user equipment(UE)based on the previously recorded beam *** another solution,an angle correction(AC)algorithm is proposed to further improve the prediction and tracking *** a benchmark,the comparisons to a previous PM tracking algorithm without prediction are *** simulation and measurement results show that the prediction algorithms successfully improve the tracking performance,which also prove the feasibilities of PM-based systems to solve complex real-time signal processing problems.

关键词： signal processing mobile communication antenna arrays

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Joint Modulations of Electromagnetic Waves and Digital Signals on a Single Metasurface Platform to Reach Programmable Wireless Communications

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Engineering 2022年第1期8卷 86-95页

作者： Xiang Wan Chaokun Xiao He Huang Qiang Xiao Wei Xu Yueheng Li Joerg Eisenbeis Jiawei Wang Ziai Huang Qiang Cheng Shi Jin thomas zwick Tiejun Cui State Key Laboratory of Millimeter Waves Southeast UniversityNanjing 210096China National Mobile Communications Research Lab Southeast UniversityNanjing 210096China Institute of Radio Frequency Engineering and Electronics(IHE) Karlsruhe Institute of Technology(KIT)Karlsruhe 76131Germany

In current wireless communication and electronic systems,digital signals and electromagnetic(EM)radiation are processed by different ***,we propose a mechanism to fuse the modulation of digital signals and the manipulation of EM radiation on a single programmable metasurface(PM).The PM consists of massive subwavelength-scale digital coding elements.A set of digital states of all elements forms simultaneous digital information roles for modulation and the wave-control sequence code of the *** designing digital coding sequences in the spatial and temporal domains,the digital information and farfield patterns of the PM can be programmed simultaneously and instantly in desired *** the experimental demonstration of the mechanism,we present a programmable wireless communication *** same system can realize transmissions of digital information in single-channel modes with beamsteerable capability and multichannel modes with multiple independent *** measured results show the excellent performance of the programmable *** work provides excellent prospects for applications in fifth-or sixth-generation wireless communications and modern intelligent platforms for unmanned aircrafts and vehicles.

关键词： Joint radar and communication Programmable metasurface Massive multiple-in and multiple-out

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100 GHz silicon–organic hybrid modulator

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Light(Science & Applications) 2014年第1期3卷 196-199页

作者： Luca Alloatti Robert Palmer Sebastian Diebold Kai Philipp Pahl Baoquan Chen Raluca Dinu Maryse Fournier Jean-Marc Fedeli thomas zwick Wolfgang Freude Christian Koos Juerg Leuthold Institutes IPQ and IMT Karlsruhe Institute of Technology(KIT)76131 KarlsruheGermany Institute IHE Karlsruhe Institute of Technology(KIT)76131 KarlsruheGermany GigOptix Inc. BothellWAUSA CEA Leti38054 GrenobleFrance Institute of Photonic Systems Swiss Federal Institute of

Electro-optic modulation at frequencies of 100 GHz and beyond is important for photonic-electronic signal processing at the highest *** date,however,only a small number of devices exist that can operate up to this *** this study,we demonstrate that this frequency range can be addressed by nanophotonic,silicon-based *** exploit the ultrafast Pockels effect by using the silicon–organic hybrid(SOH)platform,which combines highly nonlinear organic molecules with silicon *** now,the bandwidth of these devices was limited by the losses of the radiofrequency(RF)signal and the RC(resistor-capacitor)time constant of the silicon *** RF losses are overcome by using a device as short as 500 μm,and the RC time constant is decreased by using a highly conductive electron accumulation layer and an improved gate *** this method,we demonstrate for the first time an integrated silicon modulator with a 3dB bandwidth at an operating frequency beyond 100 *** results clearly indicate that the RC time constant is not a fundamental speed limitation of SOH devices at these *** device has a voltage–length product of only V_(π)L=11 V mm,which compares favorably with the best silicon-photonic modulators available *** cladding materials with stronger nonlinearities,the voltage–length product is expected to improve by more than an order of magnitude.

关键词： 100GHz high-speed silicon modulator nanophotonics silicon–organic hybrid

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Origami-inspired perovskite X-ray detector by printing and folding

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npj Flexible Electronics 2023年第1期7卷 471-478页

作者： Henning Mescher Fabian Schackmar Robert Huber Helge Eggers Marcus Zuber Elias Hamann Georg Gramlich Julian Dangelmaier Qiaoshuang Zhang Andres Georg Rösch thomas zwick Gerardo Hernandez-Sosa Ulrich W.Paetzold Uli Lemmer Light Technology Institute(LTI) Karlsruhe Institute of Technology(KIT)Karlsruhe 76131Germany Institute of Microstructure Technology(IMT) Karlsruhe Institute of Technology(KIT)Eggenstein-Leopoldshafen 76344Germany InnovationLab(IL) Heidelberg 69115Germany Institute for Photon Science and Synchrotron Radiation(IPS) Karlsruhe Institute of Technology(KIT)Eggenstein-Leopoldshafen 76344Germany Laboratory for Applications of Synchrotron Radiation(LAS) Karlsruhe Institute of Technology(KIT)Karlsruhe 76131Germany Institute of Radio Frequency Engineering and Electronics(IHE) Karlsruhe Institute of Technology(KIT)Karlsruhe 76131Germany

X-ray detectors are of pivotal importance for the scientific and technological progress in a wide range of medical,industrial,and scientific ***,we take advantage of the printability of perovskite-based semiconductors and achieve a high X-ray sensitivity combined with the potential of an exceptional high spatial resolution by our origami-inspired folded perovskite X-ray *** high performance of our device is reached solely by the folded detector architecture and does not require any *** design and fabrication of a foldable perovskite sensor array is presented and the detector is characterized as a planar and as a folded *** to 50 kVp−150 kVp X-ray radiation,the planar detector reaches X-ray sensitivities of 25−35μC/(Gyaircm^(2)),whereas the folded detector achieves remarkably increased X-ray sensitivities of several hundredμC/(Gyaircm^(2))and a record value of 1409μC/(Gyaircm^(2))at 150 kVp without photoconductive ***,the potential of an exceptional high spatial resolution of the folded detector of more than 20 lp/mm under 150 kVp X-ray radiation is demonstrated.

关键词： perovskite exceptional planar

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