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International Symposium on Antennas, Propagation and EM Theory (ISAPE)

作者： Huazhen Li Yi Zhang Guangqiu Zhang School of Information System Engineering National Digital Switching System Engineering &Technological R&D Center Zhengzhou China

ISBN: (纸本)9781509047444

A dual-band dual-polarized slot antenna for Ku-band video satellite application is proposed. It mainly consists of the ground with a wide slot and a reflector. The orthogonal modes are excited by slot-coupling feeding and microstrip feeding to realize dual polarization. The dual-band characteristic is realized using the multi-resonant performance of wide slot. The impedance bandwidth for two port covers the dual wide bandwidths of 10.7-11.7GHz and 11.7-12.7GHz. The gain can be up to 8.8dBi. The proposed antenna has low profile, simple structure, good port isolation and high gain. It is a good candidate for Ku-band video satellite antenna.

关键词： decision support systems

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Closed-form energy efficient joint power allocation for dual-hop massive MIMO relaying systems

Closed-form energy efficient joint power allocation for dual...

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IEEE International Symposium on Intelligent Signal Processing and Communication systems (ISPACS)

作者： Yi Wang Yuhan Wang Songwei Zhang Pengge Ma Shaochuan Yang Baofeng Ji Kang Song Chunguo Li School of Electronics and Communication Engineering Zhengzhou University of Aeronautics Zhengzhou China China National Digital Switching System Engineering & Technological R&D Center Zhengzhou China International Education College Henan University Kaifeng China Electronic & Information Engineering College Henan University of Science and Technology Luoyang China School of Electronic and Information Engineering Qingdao University Qingdao China School of Information Science and Engineering Southeast University Nanjing China

This paper investigates the joint power allocation problem for a three-node massive MIMO relaying system with maximum ratio combining/maximum ratio transmission (MrC/MrT) precoding strategy. Our goal is to pursuit the energy efficiency (EE) maximization while taking a quality-of-service (QoS) requirement into account by optimizing the source-relay transmit power simultaneously. To handle the EE based problem, we first derive a closed-form expression of the involved spectral efficiency (SE) by leveraging the tools of determinate equivalent approximation technique. Then, the optimal power solutions at the source and the relay are deduced in analytical forms by exploring the Lagrangian dual technology and the Lambert W function. What's more, one can find that the optimal power values at the relay and the source satisfy a specific ratio, which is determined by the system parameters and the large-scale fading factors of the two-hop channels. Numerical results illustrate the performance advantages of our developed power allocation method.

关键词： Signal processing Communication systems

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A Novel Communication Mechanism Based on Node potential Multi-path routing

A Novel Communication Mechanism Based on Node potential Mult...

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International Symposium on Optoelectronic technology and Application 2016(OTA 2016)——Conf.15 Optical Communication and Optical Network

作者： Youjun Bu Chuanhao Zhang YiMing Jiang Zheng Zhang National Digital Switching System Engineering& Technological R&D Center Railway Police College

Withthe network scales rapidly and new network applications emerge frequently, bandwidth supply for today’s Internet could not catch up with the rapidincreasing requirements. Unfortunately, irrational

ISBN: (纸本)9781510607743

关键词： multi-path loop-free routing traffic engineering resource allocation multi-path Traffic engineering resource utilization traffic network Network routing network applications network links Web resources

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Performance analysis of the encryption method based on compressed sensing at the physical layer

Performance analysis of the encryption method based on compr...

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International Symposium on Wireless Personal Multimedia Communications (WPMC)

作者： Yu Huang Liang Jin Kaizhi Huang Lu Liu Xiaolei Kang National Digital Switching System Engineering and Technological R&D Center Zhengzhou P.R. China

ISBN: (纸本)9781509053773

The simple structure of compressed sensing (CS) lead to low complexity encryption, which is fascinating for nodes with limited resources in the wireless network. In this paper, we analyze the performance of the encryption method based on compressed sensing, and prove that the encryption can achieve the information theory security. The effect of the sparsity and the signal noise ratio (SNr) on the encryption method are explored. The security and robustness of the encryption method are analyzed by a passive eavesdropper and an active attacker. Under the rayleigh fading channels, simulation results show that the security performance of the encryption increases as the sparsity decreases, and the SNr increases. In addition, the encryption approach is valid in preventing access from an active attacker based on the computation attack, which is consistent with the theory analysis.

关键词： Encryption Sensors Sparse matrices Wireless sensor networks Compressed sensing Wireless communication Communication system security

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2025 photonics for agrifood roadmap: towards a sustainable and healthier planet

Journal of Physics: Photonics

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Journal of Physics: Photonics 2025年第3期7卷 032501-032501页

作者： Lien Smeesters Francesca Venturini Stefan Paulus Anne-Katrin Mahlein david Perpetuini daniela Cardone Arcangelo Merla Benjamin Gac Stephane Perrin denis Trégoat Luiz Poffo Antoine Fournier Giuseppe Bonifazi Silvia Serranti Wenzhi Liao Noureddin Osseiran Mathias Vanwolleghem romain Peretti Aparajita Bandyopadhyay Karl Bertling Krishnan Parameswaran Aleksandar d rákic Amartya Sengupta Sune Svanberg Małgorzata Kujawinska daniel Cozzolino dolores Pérez Marín José A Entrenas de León Irina Torres rodríguez Marietta Fodor Eszter Benes Anna Matkovits Zsuzsa Jókai Simona M Cristescu Amir Khodabakhsh Khalil Jahromi Mohammadreza Nematollahi Frans H Harren Eugene rokx Ewa Sikorska Kay Sowoidnich Martin Maiwald Bernd Sumpf Matthieu roussey Kai-Erik Peiponen Antoni Femenias Polina Fomina Vjekoslav Kokoric robert Stach Boris Mizaikoff Maria Konstantaki Stavros Pissadakis Umberto Michelucci Sławomir Paśko Anna Pakuła richard A Crocombe Ellen V Miseo Andreas C Liapis Faisal Ahmed Zhipei Sun Chrysoula Chandrinou Marianneza Chatzipetrou Ioanna Zergioti Ulrich Trog Anja Haase Martin Smolka Lex Oosterveld Chris Van Hoof André Müller Michael Hlavatsch diellza Bajrami Ernesto Olvera-Gonzalez Nivia Escalante-Garcia Arturo B Soro Koenraad Van Hoorde Brijesh K Tiwari Thomas Westerhoff Michael Kneissl Anna Grazia Mignani Department of Applied Physics and Photonics Vrije Universiteit Brussel and Flanders Make Brussels Photonics (B-PHOT) Pleinlaan 2 B-1050 Brussels Belgium School of Engineering ZHAW Zurich University of Applied Sciences 8401 Winterthur Switzerland TOELT LLC Research and Development 8600 Duebendorf Switzerland Institute of Sugar Beet Research Holtenser Landstr. 77 37079 Göttingen Germany Department of Engineering and Geology University ‘D’Annunzio’ of Chieti-Pescara Pescara 65127 Italy Arvalis 45 Voie Romaine 41240 Beauce la Romaine France Université de Rennes CNRS Institut FOTON—UMR 6082 F-22305 Lannion France Photonics Bretagne 4 Rue Louis de Broglie 22300 Lannion France University of Limoges XLIM UMR CNRS 7252 Limoges France Department of Chemical Engineering Materials and Environment Sapienza—University of Rome via Eudossiana 18 00184 Rome Italy Flanders Make 8500 Kortrijk Belgium Department of Telecommunications and Information Processing Ghent University 9000 Ghent Belgium Institut d’Electronique de Microélectronique et de Nanotechnologie (IEMN) CNRS–UMR 8520 Université de Lille 59652 Villeneuve d’Ascq France DRDO-Industry-Academia Centre of Excellence (DIA-CoE) Indian Institute of Technology Delhi New Delhi 110016 India School of Electrical Engineering and Computer Science University of Queensland Brisbane QLD 4072 Australia Cambridge Consultants Boston MA United States of America Department of Physics Indian Institute of Technology Delhi New Delhi 110016 India Physics Department Lund University SE-221 00 Lund Sweden Institute of Micromechanics and Photonics Warsaw University of Technology 8 Sw. Andrzeja Boboli St 02-525 Warsaw Poland Central Office of Measures 2 Elektoralna St. 00-139 Warsaw Poland Centre for Nutrition and Food Sciences Queensland Alliance for Agriculture and Food Innovation (QAAFI) The University of Queensland St.Lucia Brisbane QLD 4072 Australia Non-Destructive Spectral Sensors Unit Department of Animal Production Fa

Photonics technologies play a crucial role in driving technological advancements within the agrifood industry, aiming to deliver a sustainable food and agriculture, and offering healthy, nutritious and safe food for all of us. Particularly, optical sensors and imaging systems, together with machine-learning processing and advanced lighting, play a pivotal role in monitoring crop and soil health with unprecedented precision, while safeguarding the food supply chain. This roadmap aims to provide an overview of the state-of-the-art photonics technologies benefitting agrifood applications, including a view on their current limitations, challenges and future potential, while addressing practical case studies. Future trends towards multimodal sensors and sensor fusion, artificial intelligence and digital twins, miniaturization and controlled farming are highlighted. The revolutionizing capabilities of the photonics technologies are indicated, inspiring future applications and developments, and paving the way towards optimized resource utilization, increased crop yields, stopping land degradation and reduction of food waste.

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LOW-COMPLEXITY BEAMFOrMING dESIGNS OF SUM SECrECY rATE MAXIMIZATION FOr THE GAUSSIAN MISO MULTI-rECEIVEr WIrETAP CHANNEL

LOW-COMPLEXITY BEAMFORMING DESIGNS OF SUM SECRECY RATE MAXIM...

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IEEE International Conference on Acoustics, Speech and Signal Processing

作者： Yanqun Tang Caiyao Sheng Yunpeng Hu Hongyi Yu Xiaoyi Zhang National Digital Switching System Engineering & Technology R & D Center Zhengzhou China 450000

ISBN: (纸本)9781479999897

This paper studies the beamforming design for sum secrecy rate (SSr) maximization in the Gaussian multiple-input single-output multi-receiver wiretap channel (MISO-MrWC). The optimization problem of finding the optimal beamforming algorithm is non-convex and intractable to solve using low-complexity methods. Motivated by the thinking of zero-forcing (ZF) and signal-to-leakage-plus-noise ratio (SLNr), we propose three low-complexity beamforming algorithms for finding a local SSr optimum. The simulation results show that the SLNr-based beamforming algorithm outperforms the other two algorithms with ZF preprocessing.

关键词： Sum secrecy rate beamforming design low complexity ZF SLNr zero frequency multiple-input single-output Beamforming Gauss Non-Convex

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Fast Automatic Link Establishment: A New Metric and the Value of Spectrum Prediction

Fast Automatic Link Establishment: A New Metric and the Valu...

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International Conference on Wireless Communications and Signal Processing

作者： Ling Yu Jin Chen Guoru ding Zhiqiang Qin College of Communications Engineering PLA University of Science and Technology China National Digital Switching System Engineering & Technological R&D Center

ISBN: (纸本)9781509028610

Automatic link establishment (ALE) is one of the important technologies in HF communication. One of the indicators to measure the performance of an ALE system is the linking time, which includes channel switching, spectrum sensing, and trying to call three periods. Asynchronous mode has been widely used for its simple operation. When establishing an link, the station sorts all the channels and selects the best available channel based on link quality analysis (LQA) matrix, which consists of scores of channels. The traditional LQA algorithm only considers a single factor, such as SNr. In this paper, a new LQA matrix combined with spectrum prediction is proposed to reduce the linking time. It is a new metric to evaluate channels. Spectrum prediction technology has been developed in order to solve the problem of time and energy consumption of spectrum sensing. Based on previous occupancy information, the statistical state parameters of each channel can be obtained. Compared with the traditional algorithm, the new algorithm balances channel state and quality parameters with multiplicative relation. The simulation results show that the linking time is reduced and the performance is improved using new algorithm, and the spectrum prediction can further reduce linking time.

关键词： Automatic link establishment Link quality analysis matrix Channel sensing order Spectrum prediction

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Structural measures of clustering quality on graph samples

Structural measures of clustering quality on graph samples

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International Conference on Advances in Social Network Analysis and Mining, ASONAM

作者： Jianpeng Zhang Yulong Pei George H. L. Fletcher Mykola Pechenizkiy Eindhoven University of Technology Eindhoven the Netherlands National Digital Switching System Engineering & Technological R&D Center Zhengzhou China

ISBN: (纸本)9781509028474

due to the growing presence of large-scale and streaming graphs such as social networks, graph sampling and clustering play an important role in many real-world applications. One key aspect of graph clustering is the evaluation of cluster quality. However, little attention has been paid to evaluation measures for clustering quality on samples of graphs. As first steps towards appropriate evaluation of clustering methods on sampled graphs, in this work we present two novel evaluation measures for graph clustering called δ-precision and δ-recall. These measures effectively reflect the match quality of the clusters in the sampled graph with respect to the ground-truth clusters in the original graph. We show in extensive experiments on various benchmarks that our proposed metrics are practical and effective for graph clustering evaluation.

关键词： Measurement Clustering algorithms Benchmark testing Partitioning algorithms Algorithm design and analysis Social network services Color

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Entity disambiguation with markov logic network knowledge graphs

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International Journal of Performability engineering 2017年第8期13卷 1293-1303页

作者： Ma, Jiangtao Wei, Tao Qiao, Yaqiong Huang, Yongzhong Xie, Weibo Zhang, Chaoqin Wang, Yanjun Zhan, rui State Key Laboratory of Mathematical Engineering and Advanced Computing Zhengzhou450002 China Zhengzhou University of Light Industry Zhengzhou450002 China National Digital Switching System Engineering and Technological R and D Center Zhengzhou451000 China Henan Institute of Engineering Computer College Zhengzhou451000 China North China University of Water Resources and Electric Power Zhengzhou450002 China

disambiguating named entities is an important problem in natural language processing, knowledge base, question answering systems. In the paper, we propose a Markov logic network knowledge graph solution for solving entity resolution problem. First, we employ knowledge graph to represent the entity relationship between linked entities in the knowledge base. Then, we utilize MLN to inference the inconsistent relationship in the knowledge graph, and disambiguate the entities in the process of entity disambiguation. As far as we know, inferencing with MLN is a first attempt for entity disambiguation in the knowledge graph. We evaluate the proposed solution with three real world knowledge bases and compare it with four baseline solutions. The experimental results demonstrate that our solution is 7% higher than other baseline methods with F1 measure. We also test our scheme and compare entity resolution systems on four datasets with three knowledge base corpora. Extensive experiments show that our solution achieves higher precision and recall than baseline solutions. © 2017 Totem Publisher, Inc. All rights reserved.

关键词： Natural language processing systems

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Baseband OFdM phase modulation system for visible light communication

Baseband OFDM phase modulation system for visible light comm...

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International Conference on Information Science and technology (ICIST)

作者： Gui-Teng Xie Hong-Yi Yu Yi-Jun Zhu National Digital Switching System Engineering &Technological R&D Center (NDSC) Henan (450000) China System Engineering &Technological R&D Center (NDSC) Henan China

In the visible light communication (VLC) orthogonal frequency-division multiplexing (OFdM) systems, the peak-to-average power ratio (PAPr) of OFdM signals is the primary concern of the transmission performance. In order to obtain low PAPr signals, we report and experimentally demonstrate a phase modulated OFdM system. The system can be reach 1.2Gbit/s under the standard illuminance level. And the bit-error ratio (BEr) of the received data is under 3.8 × 10 -3 , which is within the limit of common forward error correction (FEC) coding. The transmission distance can be reach 1.5m, which is the most remarkable in VLC OFdM systems.

关键词： Phase modulation Light emitting diodes Peak to average power ratio receivers Lighting

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