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International Conference on Wireless communications and signal processing (WCSP)

作者： Jian Ouyang Min Lin Wei-Ping Zhu Kang An Lei Wang Institute of Signal Processing and Transmission Nanjing University of Posts and Telecommunications Nanjing China Nanjing Institute of Telecommunication Technology Nanjing China Department of Electrical and Computer Engineering Concordia University Montreal QC Canada College of Communications Engineering PLA University of Science and Technology Nanjing China National Mobile Communications Research Laboratory Southeast University Nanjing China

ISBN: (纸本)9781509028610

In this paper, we study the secrecy performance of a cellular network, where a device-to-device (D2D) communication shares the spectral resources with a multi-antenna base station (BS). By assuming known the channel state information (CSI) of the legitimate user and using the maximal ratio transmission (MRT) at the BS, we first derive a closed-form expression of the ergodic secrecy capacity (ESC) for the wiretap channel as well as the ergodic capacity (EC) for the D2D link. Then, we present a simple yet efficient power allocation scheme to maximize the secrecy performance while satisfying the D2D transmission requirement. Finally, numerical results are given to demonstrate the merit of our study, concluding that the interference from the D2D communication can be exploited as a friendly jammer to enhance the security transmission in cellular networks.

关键词： Device-to-device communication Cellular networks Antennas Resource management Jamming Security Optimized production technology

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Long-Time Coherent Integration for Weak Maneuvering Target Detection and High-Order Motion Parameter Estimation Based on Keystone Transform

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IEEE Transactions on signal processing 2016年第15期64卷 4013-4026页

作者： Huang, Penghui Liao, Guisheng Yang, Zhiwei Xia, Xiang-Gen Ma, Jing-Tao Ma, Jingting National Laboratory of Radar Signal Processing Xidian University Xi'an710071 China Department of Electrical and Computer Engineering University of Delaware NewarkDE19716 United States Shanghai Engineering Center for Micro-Satellites Shanghai201203 China Beijing Huahang Radio Measurement Institute Beijing100013 China

In the airborne or spaceborne radar applications, prolonging the coherent integration time is one of the effective methods to improve the radar detection ability of a weak maneuvering target, whereas the coherent integration performance may degrade due to the complex range migration (RM) and Doppler frequency migration (DFM) effects. In this paper, detection and motion parameter estimation for a weak maneuvering target with the third-order RM and DFM are considered. Firstly, Keystone transform is applied to compensate the linear range walk. Then, the matched filtering processing is performed in the range-frequency and azimuth-time domain to eliminate the residual coupling effects between range and azimuth. Finally, a well-focused image of a moving target is obtained, and three motion parameters, i.e., velocity, acceleration, and acceleration rate, are effectively estimated. In addition, as for a fast-moving target with Doppler ambiguity, two cases, i.e., target azimuth spectrum within a pulse repetition frequency (PRF) and spanning over neighboring PRF bands, are analyzed. Compared with the generalized Radon Fourier transform (GRFT), the proposed method can acquire a close integration performance but with lower computational complexity since the parameter searching dimension is reduced. Simulated processing results are provided to validate the effectiveness of the proposed method. © 1991-2012 IEEE.

关键词： Space-based radar

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Bandwidth enlargement in acoustic-wave RF bandpass filters with planar transversal circuits 45

Bandwidth enlargement in acoustic-wave RF bandpass filters w...

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45th European Microwave Conference, EuMC 2015

作者： Gomez-Garcia, Roberto Psychogiou, Dimitra Loeches-Sanchez, Raul Peroulis, Dimitrios Department of Signal Theory and Communications University of Alcalá Polytechnic School Madrid28871 Spain School of Electrical and Computer Engineering Birck Nanotechnology Center Purdue University West LafayetteIN47906 United States

ISBN: (纸本)9782874870392

A straightforward technique to increase the bandwidth of narrow-band frequency-selective circuits for its exploitation in surface-Acoustic-wave (SAW) RF bandpass filters (BPFs) is presented. It is based on inserting the narrow-band circuit in a two-path transversal filtering section (TFS) so that its transmission band is enlarged by means of constructive signal-energy interactions. Out-of-band transmission zeros (TZs) can also be produced through destructive signal-interference phenomena for high-selectivity BPF development with multi-TFS-cascaded design strategies. The proposed bandwidth-enlargement procedure can be either applied to complete BPFs or single resonators as it is theoretically proven through two ideally synthesized examples. Furthermore, its experimental usefulness is verified with the manufacturing and characterization of a two-stage mixed-Technology SAW/microstrip BPF prototype at 890 MHz. This circuit shows a passband-width of ≈ 5× broader than that of its embedded on-chip SAW BPF (i.e., ≈ 3× wider than the kt2 of the constituent SAW resonator), while offering physical-size-reduction, passband-insertion-loss, and stopband-bandwidth advantages in relation to its conventional signal-interference planar filter counterpart. © 2015 EuMA.

关键词： Bandpass filters

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26th Annual Computational Neuroscience Meeting (CNS*2017): Part 3 Antwerp, Belgium. 15-20 July 2017 Abstracts

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BMC NEUROSCIENCE 2017年第SUPPL 1期18卷 95-176页

作者： [Anonymous] Department of Neuroscience Yale University New Haven CT 06520 USA Department Physiology & Pharmacology SUNY Downstate Brooklyn NY 11203 USA NYU School of Engineering 6 MetroTech Center Brooklyn NY 11201 USA Departament de Matemàtica Aplicada Universitat Politècnica de Catalunya Barcelona 08028 Spain Institut de Neurobiologie de la Méditerrannée (INMED) INSERM UMR901 Aix-Marseille Univ Marseille France Center of Neural Science New York University New York NY USA Aix-Marseille Univ INSERM INS Inst Neurosci Syst Marseille France Laboratoire de Physique Théorique et Modélisation CNRS UMR 8089 Université de Cergy-Pontoise 95300 Cergy-Pontoise Cedex France Department of Mathematics and Computer Science ENSAT Abdelmalek Essaadi’s University Tangier Morocco Laboratory of Natural Computation Department of Information and Electrical Engineering and Applied Mathematics University of Salerno 84084 Fisciano SA Italy Department of Medicine University of Salerno 84083 Lancusi SA Italy Dipartimento di Fisica Università degli Studi Aldo Moro Bari and INFN Sezione Di Bari Italy Data Analysis Department Ghent University Ghent Belgium Coma Science Group University of Liège Liège Belgium Cruces Hospital and Ikerbasque Research Center Bilbao Spain BIOtech Department of Industrial Engineering University of Trento and IRCS-PAT FBK 38010 Trento Italy Department of Data Analysis Ghent University Ghent 9000 Belgium The Wellcome Trust Centre for Neuroimaging University College London London WC1N 3BG UK Department of Electronic Engineering NED University of Engineering and Technology Karachi Pakistan Blue Brain Project École Polytechnique Fédérale de Lausanne Lausanne Switzerland Departement of Mathematics Swansea University Swansea Wales UK Laboratory for Topology and Neuroscience at the Brain Mind Institute École polytechnique fédérale de Lausanne Lausanne Switzerland Institute of Mathematics University of Aberdeen Aberdeen Scotland UK Department of Integrativ

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Acoustic-wave-lumped-element resonator (AWLR) architectures for high-Q reflective bandstop filters 45

Acoustic-wave-lumped-element resonator (AWLR) architectures ...

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45th European Microwave Conference, EuMC 2015

作者： Psychogiou, Dimitra Gomez-Garcia, Roberto Peroulis, Dimitrios School of Electrical and Computer Engineering Birck Nanotechnology Center Purdue University West LafayetteIN47907 United States Department of Signal Theory and Communications University of Alcalá Alcalá de Henares Madrid28871 Spain

ISBN: (纸本)9782874870392

The RF design of a new family of reflective-Type bandstop filters (BSFs) with small form factor, narrow bandwidth (BW) and large stopband attenuation is presented in this paper. The proposed filter geometries are based on mixed acoustic-wave-lumped-element resonator (AWLR) architectures that are effectively combined with lumped-element impedance inverters. Contrary to conventional all-AW filter topologies, the achieved stopband BW is no longer limited by the electromechanical coupling coefficient (kt2) of the acoustic wave (AW) resonator. Furthermore, their resulting stopbands exhibit effective quality factors (Qseff) that are at least 50 times higher than in traditional lumped-element filters. First-and second-order BSF prototypes that consist of commercially-Available surface acoustic wave (SAW) resonators and surface mounted devices (SMDs) have been designed, built and measured at 418 MHz. Measured stopbands with 3dB-BWs between 0.25 MHz and 0.72 MHz, maximum stopband attenuation ranging from 20 to 30 dB, and passband loss between 0.4 and 1 dB are presented as proof-of-concept demonstrators. © 2015 EuMA.

关键词： Notch filters

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Miniaturized signal-interference planar filters 45

Miniaturized signal-interference planar filters

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45th European Microwave Conference, EuMC 2015

作者： Loeches-Sanchez, Raul Psychogiou, Dimitra Gomez-Garcia, Roberto Peroulis, Dimitrios Department of Signal Theory and Communications University of Alcalá Polytechnic School Alcalá de Henares Madrid28871 Spain School of Electrical and Computer Engineering Birck Nanotechnology Center Purdue University West LafayetteIN47907 United States

ISBN: (纸本)9782874870392

This paper addresses, for the first time, the development of miniaturized-size signal-interference planar filters. In particular, capacitive-loading and meandering-line techniques are simultaneously applied to decrease their occupied area. Footprint reduction, transfer function narrowing, and increased insertion loss caused by the capacitive loading are carefully considered for single-and multi-band bandpass filters (BPFs). Line meandering enables further size reduction in these circuits without coupled-line stages, since spurious-coupling effects become less critical. A 1-GHz miniaturized two-stage BPF prototype based on the hybrid-ring-Type transversal filtering section (TFS) is built and tested to experimentally validate the presented concepts. This BPF prototype is nearly 4× smaller than its classic counterpart. © 2015 EuMA.

关键词： Bandpass filters

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Sum-Rate and Power Scaling of Massive MIMO Systems with Channel Aging

Sum-Rate and Power Scaling of Massive MIMO Systems with Chan...

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作者： Kong, Chuili Zhong, Caijun Papazafeiropoulos, Anastasios K. Matthaiou, Michail Zhang, Zhaoyang Institute of Information and Communication Engineering Zhejiang University Hangzhou310027 China National Mobile Communications Research Laboratory Southeast University Nanjing210096 China Department of Communications and Signal Processing Group Imperial College London London United Kingdom School of Electronics Electrical Engineering and Computer Science Queen's University Belfast Belfast United Kingdom

This paper investigates the achievable sum-rate of massive multiple-input multiple-output (MIMO) systems in the presence of channel aging. For the uplink, by assuming that the base station (BS) deploys maximum ratio combining (MRC) or zero-forcing (ZF) receivers, we present tight closed-form lower bounds on the achievable sum-rate for both receivers with aged channel state information (CSI). In addition, the benefit of implementing channel prediction methods on the sum-rate is examined, and closed-form sum-rate lower bounds are derived. Moreover, the impact of channel aging and channel prediction on the power scaling law is characterized. Extension to the downlink scenario and multicell scenario is also considered. It is found that, for a system with/without channel prediction, the transmit power of each user can be scaled down at most by 1/√M (where M is the number of BS antennas), which indicates that aged CSI does not degrade the power scaling law, and channel prediction does not enhance the power scaling law;instead, these phenomena affect the achievable sum-rate by degrading or enhancing the effective signal to interference and noise ratio, respectively. © 2015 IEEE.

关键词： Channel state information

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Nonlinear Diffusion Adaptation with Bounded Transmission over Distributed Networks

Nonlinear Diffusion Adaptation with Bounded Transmission ove...

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IEEE International Conference on communications

作者： Jongmin Lee Cihan Tepedelenlioglu Mahesh K. Banavar Andreas Spanias Signal and Information Processing (SenSIP) Center School of Electrical Computer and Energy Engineering Arizona State University Department of Electrical and Computer Engineering Clarkson University

ISBN: (纸本)9781467364300

This paper introduces diffusion adaptation strategies over distributed networks with nonlinear transmissions, motivated by the necessity for bounded transmit power. Local information is exchanged in real-time with neighboring nodes in order to estimate a common parameter vector via constrained nonlinear transmissions, using an adaptive learning algorithm. We propose nonlinear diffusion strategies for such an adaptive estimation. We will study convergence properties of the proposed algorithm in the mean and the mean-square sense. Simulations support the performance analysis and show that the proposed algorithm performs close to the linear case with the added advantage of power savings.

关键词： Nonlinear diffusion Bounded transmission Adaptive networks Consensus Distributed sensor networks

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Achievable Transmission Rates and Self-Interference Channel Estimation in Hybrid Full-Duplex/Half-Duplex MIMO Relaying

Achievable Transmission Rates and Self-Interference Channel ...

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IEEE Conference on Vehicular Technology (VTC)

作者： Dani Korpi Taneli Riihonen Katsuyuki Haneda Koji Yamamoto Mikko Valkama Department of Electronics and Communications Engineering Tampere University of Technology Finland Department of Electrical Engineering Columbia University in the City of New York United States Department of Signal Processing and Acoustics School of Electrical Engineering Finland Department of Radio Science and Engineering School of Electrical Engineering Finland Department of Communications and Computer Engineering Kyoto University Japan

ISBN: (纸本)9781479980925

This paper investigates the achievable throughput of a multi-antenna two-hop relay link under hybrid full/half-duplex operation. The analysis is facilitated by realistic waveform simulations, which explicitly model all the essential circuit impairments occurring in the relay transceiver together with degrading channel estimation and self-interference cancellation. The obtained results indicate that pure full-duplex operation does not ensure optimal performance but additional half-duplex transmission periods are usually needed to maximize the end-to-end throughput. Especially, it is shown that the estimation of the self-interference channel within the relay should be performed when the source is not transmitting anything while also the source should be allowed to transmit alone to avoid making the first hop a bottleneck. These findings form a solid basis for optimizing the full-duplex MIMO relay deployments in future mobile networks.

关键词： Relays Channel estimation signal to noise ratio Throughput Interference cancellation Receivers

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Multimodal 2D Brain computer Interface 37

Multimodal 2D Brain Computer Interface

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37th Annual International Conference of the IEEE engineering in Medicine and Biology Society, EMBC 2015

作者： Almajidy, Rand K. Boudria, Yacine Hofmann, Ulrich G. Besio, Walter Mankodiya, Kunal Section for Neuroelectronic Systems Dept. of Neurosurgery University of Freiburg Medical Center Freiburg Germany Institute for Signal Processing University of Luebeck Luebeck Germany College of Medicine University of Diyala Diyala Iraq Department of Electrical Computer and Biomedical Engineering University of Rhode Island KingstonRI United States

ISBN: (纸本)9781424492718

In this work we used multimodal, non-invasive brain signal recording systems, namely Near Infrared Spectroscopy (NIRS), disc electrode electroencephalography (EEG) and tripolar concentric ring electrodes (TCRE) electroencephalography (tEEG). 7 healthy subjects participated in our experiments to control a 2-D Brain computer Interface (BCI). Four motor imagery task were performed, imagery motion of the left hand, the right hand, both hands and both feet. The signal slope (SS) of the change in oxygenated hemoglobin concentration measured by NIRS was used for feature extraction while the power spectrum density (PSD) of both EEG and tEEG in the frequency band 8-30Hz was used for feature extraction. Linear Discriminant Analysis (LDA) was used to classify different combinations of the aforementioned features. The highest classification accuracy (85.2%) was achieved by using features from all the three brain signals recording modules. The improvement in classification accuracy was highly significant (p = 0.0033) when using the multimodal signals features as compared to pure EEG features. © 2015 IEEE.

关键词： biomedical electrodes brain-computer interfaces electroencephalography feature extraction infrared spectra medical signal processing signal classification BCI EEG LDA classification accuracy disc electrode electroencephalography frequency 8 Hz to 30 Hz imagery motion linear discriminant analysis motor imagery task multimodal 2D brain computer interface multimodal noninvasive brain signal recording systems near infrared spectroscopy oxygenated hemoglobin concentration power spectrum density signal slope tripolar concentric ring electrode electroencephalography Accuracy Band-pass filters Brain-computer interfaces Electrodes Electroencephalography Feature extraction Spectroscopy Near Infrared Spectroscopy multimodal Brain computer Interface tripolar concentric ring electrodes (TCRE) Feature extraction Brain-computer Interfaces Electroencephalography Near infrared spectroscopy near infrared reflectance spectroscopy Power spectral density Band-pass filters biomedical electrodes medical signal processing signal classification Linear discriminant analysis laser Doppler anemometry Anterior interventricular branch of left coronary artery Left-sided displacement of abomasum Electrodes

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