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Interference mitigation in GNSS receivers by array signal processing: A software radio approach

Interference mitigation in GNSS receivers by array signal pr...

引用

sensor array and multichannel signal processing workshop

作者： Javier Arribas Pau Closas Carles Fernández-Prades Centre Tecnologic de Telecomunicacions de Catalunya (CTTC) Carl Friedrich Gauss Spain

the fact that most of high-accuracy positioning and distributed timing services, including safety-critical operations, rely on Global Navigation Satellite Systems (GNSS) has raised the concern of possible denial-of-service situations. Complementary to time- and frequency-domain mitigation techniques, it is well known that antenna-array based receivers can benefit from spatial domain processing and effectively mitigate unintentional and intentional Radio Frequency Interferences (RFIs). In this work, we propose a software-based GNSS receiver architecture that implements a real-time, array-based signal acquisition algorithm based on the Generalized Likelihood Ratio Test, combined with a null-steering spatial filter for signal tracking, showing its RFI rejection capabilities.

关键词： Global Positioning System arrays Receivers Interference Satellites signal processing algorithms Satellite broadcasting

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Max-flow min-cut for power system security index computation

Max-flow min-cut for power system security index computation

引用

sensor array and multichannel signal processing workshop

作者： Oliver Kosut School of Electrical Arizona State University Tempe AZ

the security index problem for false data injection attacks on power systems is considered. In particular, the problem is to find the minimum cost set of bus injection meters and line flow meters that an attacker can seize so as to execute a false data injection. A polynomial-time algorithm is provided to solve this problem in certain settings, based on the principle of max-flow min-cut. the security index problem is shown to be equivalent to a min-cut problem, and that this problem can be solved using a generalization of the classic max-flow min-cut algorithm in which flows are successively augmented until doing so is no longer possible.

关键词： Security Indexes signal processing algorithms Power systems Vectors Observability Transmission line measurements

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Simulation research on erosion thickness measurement of oil and gas pipeline based on array electromagnetic ultrasound 4

Simulation research on erosion thickness measurement of oil ...

引用

4th International Conference on Intelligent Control, Measurement and signal processing, ICMSP 2022

作者： Wang, Yunlong Gao, Guowang Wu, Dan Wang, Fei Zhao, Peng Yan, Suli College of Electronic Engineering Xian Shiyou University Xi'an China Chuanqing Drilling Engineering Company China National Petroleum Corporation Xi'an China

ISBN: (数字)9781665486583

ISBN: (纸本)9781665486583

In the process of oil and gas exploitation, the formation sand is carried into the surface pipeline, which damages the pipe wall, elbow, pump valve and other conveying equipment. With the increase of pipeline service time, the evaluation of oil and gas pipeline erosion degree is very necessary to identify pipeline integrity, and can effectively prevent the occurrence of accidents. In order to realize the detection of bend erosion of oil and gas pipelines, this paper proposed a detection method based on electromagnetic ultrasound. For curved specimens, array electromagnetic ultrasound was adopted to construct a two-dimensional section structure model of boldsymbol{3times 3} array sensor. Com sol multi-physical field simulation software was used to optimize the probe parameters. the propagation process of ultrasonic wave in pipe wall under multi-probe excitation is simulated, and the results show that the array electromagnetic ultrasonic detection is better for measuring pipe bend. © 2022 ieee.

关键词： Erosion

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A game-theoretic approach for energy-efficient detection in radar sensor networks

A game-theoretic approach for energy-efficient detection in ...

引用

sensor array and multichannel signal processing workshop

作者： Giacomo Bacci Luca Sanguinetti Maria S. Greco Marco Luise Dipartimento di Ingegneria dellInformazione University of Pisa Pisa Italy

In this work, we propose a distributed power control algorithm able to capture the tradeoff between detection capabilities and power consumption for a radar sensor network. this is achieved by modeling the radar sensors as rational agents engaging in a noncooperative game in which the detection threshold and the transmit power are properly designed according to the Nash equilibrium solution. An iterative algorithm based on a best-response dynamics is proposed to achieve the equilibrium point and its performance is compared to that achieved by a uniform power allocation.

关键词： Radar cross section Radar antennas Clutter Doppler radar Radar detection

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Space-time adaptive principle component analysis for time-delay estimation

Space-time adaptive principle component analysis for time-de...

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sensor array and multichannel signal processing workshop

作者： Felix Trötschel Felix Antreich Josef A. Nossek German Aerospace Center (DLR) Institute of Communications and Navigation Oberpfaffenhofen Germany Technical University of Munich (TUM) Institute for Circuit Theory and Signal Processing Munich Germany

In this work we present a blind approach based on space-time adaptive principle component analysis using an antenna array and a compression method based on canonical components in order to mitigate multipath for Global Navigation Satellite Systems (GNSS). First, pre-processing algorithms are used to separate (decorrelate) the different sources in the compressed space-time eigenspace and then the time-delay estimation is performed with a simple interpolation scheme in the compressed time domain. the proposed algorithm is capable of separating highly correlated and even coherent signals and approaches the respective Cramer-Rao lower bound (CRLB) for time-delay estimation in the compressed time domain.

关键词： arrays Estimation Global Positioning System Correlators signal processing Covariance matrices Conferences

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Canonical decomposition of even higher order cumulant arrays for blind underdetermined mixture identification

Canonical decomposition of even higher order cumulant arrays...

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sensor array and multichannel signal processing workshop

作者： Ahmad Karfoul Laurent Albera Lieven De Lathauwer INSERM U642 Rennes France Leuven Subfaculty Science and Technology Katholieke Universiteit Leuven Kortrijk Belgium

A new family of methods, named 2q-ORBIT (q > 1), is proposed in this paper in order to blindly identify potentially underdetermined mixtures of statistically independent sources. these methods are based on the canonical decomposition of q-th order (q ges 2) cumulants. the latter decomposition is brought back to the decomposition of a third order array whose one loading matrix is unitary. Such a decomposition is then computed by alterning and repeating two schemes until convergence: the first one consists in solving a Procrustes problem while the second one needs to compute the best rank-1 approximation of several q-th order arrays. Computer results show a good efficiency of the proposed methods with respect to classical cumulant-based algorithms especially in the underdetermined case.

关键词： Matrix decomposition sensors signal to noise ratio sensor arrays signal processing algorithms Equations Convergence

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Blind Source Separation with Non-Coplanar Interferometric Data

Blind Source Separation with Non-Coplanar Interferometric Da...

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sensor array and multichannel signal processing workshop

作者： Ré mi Carloni Gertosio Jé r4 me Bobin IRFU CEA Universit&#x00E9 Paris-Saclay Gif-sur-Yvette France

the advent of large-scale radio-interferometers mandates the development of new analysis methods that can tackle instrumental effects such as antenna baseline non-coplanarity. In particular, blind source separation (BSS) methods, which are one of the main analytical tools for extracting valuable physical information from the multispectral data provided by radio-interferometers, must be adapted. To that end, we intro-duce a joint deconvolution and blind source separation (DBSS) algorithm called wGMCA, allowing the analysis of non-coplanar interferometric data in radio-astronomy.

关键词： Deconvolution Image resolution Instruments Conferences signal processing algorithms Blind source separation Data mining

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Qoe-Aware UAV Flight Path Design for Mobile Video Streaming in HetNet

Qoe-Aware UAV Flight Path Design for Mobile Video Streaming ...

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sensor array and multichannel signal processing workshop

作者： Stefania Colonnese Andrea Carlesimo Lorenzo Brigato Francesca Cuomo Sapienza University of Rome Rome Italy

In this paper, we address the problem of devising a Quality of Experience (QoE) aware flight plan for UAV mounted Base Station within heterogeneous networks. Specifically, we propose a QoE aware flight planning algorithm leveraging the well established Q-learning approach and introducing a reward related to relevant QoE metrics. Numerical simulation results show the effectiveness of the QoE-aware learning algorithm to devise a flight path such that the UAVs mounted Base Station actually improves the QoE of the heterogeneous network users.

关键词： Quality of experience Streaming media signal processing algorithms Delays Bandwidth Path planning Unmanned aerial vehicles

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A sensor interface based on sparse NMF for piano musical transcription

A sensor interface based on sparse NMF for piano musical tra...

引用

ieee International workshop on Advances in sensors and Interfaces

作者： Costantini, Giovanni Todisco, Massimiliano Saggio, Giovanni Department of Electronic Engineering University of Rome Tor Vergata via del Politecnico 1 Rome Italy Institute of Acoustics O. M. Corbino via del Fosso del Cavaliere Rome Italy

ISBN: (纸本)9781457706226

A new sensor interface for detecting notes in the musical audio signals is proposed. Our sensor interface is able to transform acoustic pressure, caused by a sound wave of polyphonic piano music, into a musical score, that is a symbolic representation of musical notes. We focuses on note attack instant (onset) and note name (pitch). signal processing techniques based on the Constant-Q Transform (CQT) are used to create a time-frequency representation of the signal. In particular, we propose a supervised classification methods based on sparse Non-Negative Matrix Factorization (NMF) to detect note pitch. We present a collection of experiments using the Inventions and Sinfonias BWV 772-801 of the composer J. S. Bach. © 2011 ieee.

关键词： Music

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A Performance-Weighted Blended Dominant Mode Rejection Beamformer

A Performance-Weighted Blended Dominant Mode Rejection Beamf...

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sensor array and multichannel signal processing workshop

作者： John R. Buck Andrew C. Singer ECE Department University of Massachusetts Dartmouth Dartmouth MA USA ECE Department University of Illinois Urbana-Champaign Urbana IL USA

Adaptive beamformers operating in snapshot deficient situations often estimate regularization parameters such as the diagonal loading level or the signal subspace dimension. We propose a new beamformer that avoids this problem by computing its array weights as a mixture of the array weights for a set of beamformers. the new beamformer's average output power asymptotically approaches the best performance of any of the beamformers in the set. Applying this technique to the Dominant Mode Rejection (DMR) beamformer obviates the need to estimate the dominant signal subspace dimension. An example simulation of a complicated passive sonar scenario illustrates that the blended beamformer's performance rivals the performance of the best fixed subspace DMR beamformer, and may outperform all of them in nonstationary environments.

关键词： Power generation sensor arrays array signal processing Direction-of-arrival estimation Adaptation models Loading

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