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Adaptive Scaling Active Constellation Extension Scheme with Fast Convergence for PAPR Reduction in OFDM/OQAM Signals

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Adaptive Scaling Active Constellation Extension Scheme with ...

IEEE Vehicular technology Conference

作者： Sandeepkumar Hoa Le Minh Nauman Aslam Mohsin Raza Anh T. Pham Department of Mathematics Physics and Electrical Engineering Northumbria University Newcastle Department of computer and information sciences Northumbria University Newcastle Faculty of Science and Technology Middlesex University London Computer Communications Laboratory University of Aizu

ISBN: (纸本)9781538663592;9781538663585

Active Constellation Extension (ACE) is widely used to reduce Peak-to-Average Power Ratio (PAPR) in Offset Quadrature Amplitude Modulation based Orthogonal Frequency Division Multiplexing (OFDM/OQAM). To improve overall performance and energy efficiency in OFDM/OQAM systems, this paper proposes Adaptive Scaling (AS) for effective ACE (AS-ACE). The proposed scheme exploits the overlapping structure of the OFDM/OQAM signals and jointly considers adjacent data blocks to obtain the clipping noise. The proposed scheme adaptively extends the constellation points to effectively eliminate peaks in OFDM/OQAM signals. This is achieved by using peak samples of clipping noise, used to generate the peak correcting signal. Least square approximation algorithm is used to fit the waveform of peak correcting signal to the waveform of clipping noise without any decrease in the constellation distance. Simulation results show that the AS-ACE reduces PAPR and Bit Error Rate (BER) and improves convergence speed compared to OSGP technique without requiring increased processing or additional information at the receiver end.

关键词： Active constellation extension (ACE) Peak average power ratio (PAPR) Overlapping smart gradient pro-jection (OSGP) Adaptive scaling (AS) Peak to average power ratio CONSTELLATIONS Bit error rate waveforms OQAM clipping Line clipping Approximation algorithms Orthogonal frequency division multiplexing signals

Galaxy-galaxy lensing with the DES-CMASS catalogue: Measurement and constraints on the galaxy-matter cross-correlation

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arXiv 2021年

作者： Lee, S. Troxel, M.A. Choi, A. Elvin-Poole, J. Hirata, C. Honscheid, K. Huff, E.M. MacCrann, N. Ross, A.J. Eifler, T.F. Chang, C. Miquel, R. Omori, Y. Prat, J. Bernstein, G.M. Davis, C. DeRose, J. Gatti, M. Rau, M.M. Samuroff, S. Sánchez, C. Vielzeuf, P. Zuntz, J. Aguena, M. Allam, S. Amon, A. Andrade-Oliveira, F. Bertin, E. Brooks, D. Burke, D.L. Carnero Rosell, A. Carrasco Kind, M. Carretero, J. Castander, F.J. Cawthon, R. Conselice, C. Costanzi, M. da Costa, L.N. Pereira, M.E.S. de Vicente, J. Desai, S. Diehl, H.T. Dietrich, J.P. Doel, P. Everett, S. Evrard, A.E. Ferrero, I. Flaugher, B. Fosalba, P. Frieman, J. García-Bellido, J. Gaztanaga, E. Gerdes, D.W. Giannantonio, T. Gruen, D. Gruendl, R.A. Gschwend, J. Gutierrez, G. Hartley, W.G. Hinton, S.R. Hollowood, D.L. Hoyle, B. Huterer, D. James, D.J. Kuehn, K. Kuropatkin, N. Lahav, O. Lima, M. Maia, M.A.G. March, M. Marshall, J.L. Menanteau, F. Mohr, J.J. Morgan, R. Palmese, A. Paz-Chinchón, F. Pieres, A. Plazas Malagón, A.A. Roodman, A. Sanchez, E. Scarpine, V. Schubnell, M. Serrano, S. Sevilla-Noarbe, I. Sheldon, E. Smith, M. Suchyta, E. Swanson, M.E.C. Tarle, G. Thomas, D. To, C. Varga, T.N. Weller, J. Department of Physics Duke University DurhamNC27708 United States Center for Cosmology and Astro-Particle Physics The Ohio State University ColumbusOH43210 United States Department of Physics The Ohio State University ColumbusOH43210 United States Jet Propulsion Laboratory California Institute of Technology 4800 Oak Grove Dr. PasadenaCA91109 United States Department of Applied Mathematics and Theoretical Physics University of Cambridge CambridgeCB3 0WA United Kingdom Department of Astronomy/Steward Observatory University of Arizona 933 North Cherry Avenue TucsonAZ85721-0065 United States Department of Astronomy and Astrophysics University of Chicago ChicagoIL60637 United States Kavli Institute for Cosmological Physics University of Chicago ChicagoIL60637 United States Institució Catalana de Recerca i Estudis Avançats BarcelonaE-08010 Spain The Barcelona Institute of Science and Technology Campus UAB Bellaterra Barcelona08193 Spain Kavli Institute for Particle Astrophysics & Cosmology Stanford University P. O. Box 2450 StanfordCA94305 United States Department of Physics and Astronomy University of Pennsylvania PhiladelphiaPA19104 United States Department of Astronomy University of California Berkeley 501 Campbell Hall BerkeleyCA94720 United States Santa Cruz Institute for Particle Physics Santa CruzCA95064 United States Department of Physics Carnegie Mellon University PittsburghPA15312 United States Institute for Astronomy University of Edinburgh EdinburghEH9 3HJ United Kingdom Departamento de Física Matemática Instituto de Física Universidade de São Paulo CP 66318 SP São Paulo05314-970 Brazil Laboratório Interinstitucional de e-Astronomia - LIneA Rua Gal. José Cristino 77 RJ Rio de Janeiro20921-400 Brazil Fermi National Accelerator Laboratory P. O. Box 500 BataviaIL60510 United States Instituto de Física Teórica Universidade Estadual Paulista São Paulo Brazil CNRS UMR 7095 Institut d’Astrophysique de Paris Par

The DMASS sample is a photometric sample from the DES Year 1 data set designed to replicate the properties of the CMASS sample from BOSS, in support of a joint analysis of DES and BOSS beyond the small overlapping area. In this paper, we present the measurement of galaxy-galaxy lensing using the DMASS sample as gravitational lenses in the DES Y1 imaging data. We test a number of potential systematics that can bias the galaxy-galaxy lensing signal, including those from shear estimation, photometric redshifts, and observing conditions. After careful systematic tests, we obtain a highly significant detection of the galaxy-galaxy lensing signal, with total S/N = 25.7. With the measured signal, we assess the feasibility of using DMASS as gravitational lenses equivalent to CMASS, by estimating the galaxy-matter cross-correlation coefficient rcc. By jointly fitting the galaxy-galaxy lensing measurement with the galaxy clustering measurement from CMASS, we obtain rcc = 1.09−0.11+0.1211 for the scale cut of 4h−1 Mpc and rcc = 1.06−0.12+0.13 for 12h−1 Mpc in fixed cosmology. By adding the angular galaxy clustering of DMASS, we obtain rcc = 1.06 ± 0.10 for the scale cut of 4h−1 Mpc and rcc = 1.03 ± 0.11 for 12h−1 Mpc. The resulting values of rcc indicate that the lensing signal of DMASS is statistically consistent with the one that would have been measured if CMASS had populated the DES region within the given statistical uncertainty. The measurement of galaxy-galaxy lensing presented in this paper will serve as part of the data vector for the forthcoming cosmology analysis in preparation. © 2021, CC BY.

关键词： Galaxies

Effect of bulk viscosity on interferometry correlations in ultrarelativistic heavy-ion collisions

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arXiv 2017年

作者： Bożek, Piotr AGH University of Science and Technology Faculty of Physics and Applied Computer Science al. Mickiewicza 30 Krakow30-059 Poland

A temperature dependent bulk viscosity coefficient is used in 3 + 1-dimensional hydrodynamic simulations. I study the effect of the increase of bulk viscosity around the critical temperature on the system dynamics in central Pb+Pb collisions at √sNN = 2760 GeV. With increasing bulk viscosity the life-time of the system increases slightly. Also the shape of the freeze-out hypersurface changes, the outer layers of the fireball live longer. This effect causes a small reduction of the ratio of two interferometry radii Rout/Rside, improving the agreement with experimental data. Copyright © 2017, The Authors. All rights reserved.

关键词： Interferometry

Azimuthal angle dependence of the charge imbalance from charge conservation effects

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arXiv 2017年

作者： Bozek, Piotr AGH University of Science and Technology Faculty of Physics and Applied Computer Science al. Mickiewicza 30 Krakow30-059 Poland

The experimental search for the chiral magnetic effect in heavy-ion collisions is based on charge dependent correlations between emitted particles. Recently, a sensitive observable comparing event-by-event distributions of the charge splitting projected on the directions along and perpendicular to the direction of the elliptic flow has been proposed. The results of a 3+1-dimensional hydrodynamic model show that the preliminary experimental data of the STAR Collaboration can be explained as due to background effects, such as resonance decays and local charge conservation in the particle production. A related observable based on the third order harmonic flow is proposed to further investigate such background effects in charge dependent correlations. Copyright © 2017, The Authors. All rights reserved.

关键词： Colliding beam accelerators

Search for neutrino counterparts to the gravitational wave sources from LIGO/Virgo O3 run with the ANTARES detector

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arXiv 2023年

作者： Albert, A. Alves, S. André, M. Ardid, M. Ardid, S. Aubert, J.-J. Aublin, J. Baret, B. Basa, S. Becherini, Y. Belhorma, B. Bendahman, M. Benfenati, F. Bertin, V. Biagi, S. Bissinger, M. Boumaaza, J. Bouta, M. Bouwhuis, M.C. Brânzaş, H. Bruijn, R. Brunner, J. Busto, J. Caiffi, B. Calvo, D. Campion, S. Capone, A. Caramete, L. Carenini, F. Carr, J. Carretero, V. Celli, S. Cerisy, L. Chabab, M. Chau, T.N. El Moursli, R. Cherkaoui Chiarusi, T. Circella, M. Coelho, J.A.B. Coleiro, A. Coniglione, R. Coyle, P. Creusot, A. Cruz, A.S.M. Díaz, A.F. De Martino, B. Distefano, C. Di Palma, I. Domi, A. Donzaud, C. Dornic, D. Drouhin, D. Eberl, T. van Eeden, T. van Eijk, D. El Hedri, S. El Khayati, N. Enzenhöfer, A. Fermani, P. Ferrara, G. Filippini, F. Fusco, L. Gagliardini, S. García, J. Oliver, C. Gatius Gay, P. Geißelbrecht, N. Glotin, H. Gozzini, R. Ruiz, R. Gracia Graf, K. Guidi, C. Haegel, L. Hallmann, S. van Haren, H. Heijboer, A.J. Hello, Y. Hernández-Rey, J.J. Hößl, J. Hofestädt, J. Huang, F. Illuminati, G. James, C.W. Jisse-Jung, B. de Jong, M. de Jong, P. Kadler, M. Kalekin, O. Katz, U. Kouchner, A. Kreykenbohm, I. Kulikovskiy, V. Lahmann, R. Lamoureux, M. Lazo, A. Lefèvre, D. Leonora, E. Levi, G. Le Stum, S. Lopez-Coto, D. Loucatos, S. Maderer, L. Manczak, J. Marcelin, M. Margiotta, A. Marinelli, A. Martínez-Mora, J.A. Migliozzi, P. Moussa, A. Muller, R. Nauta, L. Navas, S. Nezri, E. Fearraigh, B.Ó. Păun, A. Păvălaş, G.E. Perrin-Terrin, M. Pestel, V. Piattelli, P. Poirè, C. Popa, V. Pradier, T. Randazzo, N. Real, D. Reck, S. Riccobene, G. Romanov, A. Sánchez-Losa, A. Saina, A. Greus, F. Salesa Samtleben, D.F.E. Sanguineti, M. Sapienza, P. Schnabel, J. Schumann, J. Schüssler, F. Seneca, J. Spurio, M. Stolarczyk, Th. Taiuti, M. Tayalati, Y. Tingay, S.J. Vallage, B. Vannoye, G. Van Elewyck, V. Viola, S. Vivolo, D. Wilms, J. Zavatarelli, S. Zegarelli, A. Zornoza, J.D. Zúñiga, J. Université de Strasbourg CNRS IPHC UMR 7178 StrasbourgF-67000 France Université de Haute Alsace MulhouseF-68100 France c/ Catedrático José Beltrán Valencia Paterna2 E-46980 Spain Technical University of Catalonia Laboratory of Applied Bioacoustics Rambla Exposició Vilanova i la Geltrú Barcelona08800 Spain Universitat Politècnica de València C/ Paranimf 1 Gandia46730 Spain Aix Marseille Univ CNRS IN2P3 CPPM Marseille France Université Paris Cité CNRS Astroparticule et Cosmologie ParisF-75013 France Aix Marseille Univ CNRS CNES LAM Marseille France National Center for Energy Sciences and Nuclear Techniques B.P.1382 R. P.10001 Rabat Morocco University Mohammed V in Rabat Faculty of Sciences 4 av. Ibn Battouta B.P. 1014 RabatR.P. 10000 Morocco INFN - Sezione di Bologna Viale Berti-Pichat 6/2 Bologna40127 Italy Dipartimento di Fisica e Astronomia Università di Bologna Viale Berti-Pichat 6/2 Bologna40127 Italy Via S. Sofia 62 Catania95123 Italy Friedrich-Alexander-Universität Erlangen-Nürnberg Erlangen Centre for Astroparticle Physics Erwin-Rommel-Str. 1 Erlangen91058 Germany University Mohammed I Laboratory of Physics of Matter and Radiations B.P.717 Oujda6000 Morocco Nikhef Science Park Amsterdam Netherlands Institute of Space Science Bucharest MăgureleRO-077125 Romania Universiteit van Amsterdam Instituut voor Hoge-Energie Fysica Science Park 105 Amsterdam1098 XG Netherlands INFN - Sezione di Genova Via Dodecaneso 33 Genova16146 Italy INFN - Sezione di Roma P.le Aldo Moro 2 Roma00185 Italy Dipartimento di Fisica Università La Sapienza P.le Aldo Moro 2 Roma00185 Italy LPHEA Faculty of Science - Semlali Cadi Ayyad University MarrakechP.O.B. 2390 Morocco INFN - Sezione di Bari Via E. Orabona 4 Bari70126 Italy International Centre for Radio Astronomy Research Curtin University BentleyWA6102 Australia Department of Computer Architecture and Technology CITIC University of Granada Granada18071 Spain Unive

Since 2015 the LIGO and Virgo interferometers have detected gravitational waves from almost one hundred coalescences of compact objects (black holes and neutron stars). This article presents the results of a search performed with data from the ANTARES telescope to identify neutrino counterparts to the gravitational wave sources detected during the third LIGO/Virgo observing run and reported in the catalogues GWTC-2, GWTC-2.1, and GWTC-3. This search is sensitive to all-sky neutrinos of all flavours and of energies > 100 GeV, thanks to the inclusion of both track-like events (mainly induced by νµ charged-current interactions) and shower-like events (induced by other interaction types). Neutrinos are selected if they are detected within ±500 s from the GW merger and with a reconstructed direction compatible with its sky localisation. No significant excess is found for any of the 80 analysed GW events, and upper limits on the neutrino emission are derived. Using the information from the GW catalogues and assuming isotropic emission, upper limits on the total energy Etot,ν emitted as neutrinos of all flavours and on the ratio fν = Etot,ν/EGW between neutrino and GW emissions are also computed. Finally, a stacked analysis of all the 72 binary black hole mergers (respectively the 7 neutron star - black hole merger candidates) has been performed to constrain the typical neutrino emission within this population, leading to the limits: Etot,ν 53 erg and fν tot,ν 53 erg and fν −2 spectrum and isotropic emission. Other assumptions including softer spectra and non-isotropic scenarios have also been tested. © 2023, CC BY.

关键词： Gravity waves

A novel algorithm based on entanglement measurement for improving speed of quantum algorithms

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applied Mathematics and Information sciences 2018年第1期12卷 265-269页

作者： Zidan, Mohammed Abdel-Aty, Abdel-Haleem Younes, A. Zanaty, E.A. El-khayat, I. Abdel-Aty, Mahmoud University of Science and Technology Zewail City Sheikh Zayed Dist. 6th of October City Giza 12588 Egypt Physics Department Faculty of Science Al-Azhar University Assiut 71524 Egypt Department of Mathematics and oComputer Science Faculty of Science Alexandria University Egypt Mathematics and Computer Science Department Faculty of Sciences Sohag University Sohag Egypt Applied Sciences University Kingdom Bahrain

In this paper, we draw attention to consider that the quantum entanglement measurement should be implemented as a keypart during manufacturing the quantum processors and quantum micro-controllers. This paper aims to harness the complete power of quantum mechanics by the crossover between entanglement measurements and quantum gates to propose a novel quantum computer algorithms and protocols. One of these measurements that we apply is concurrence, used to measure entanglement in a two-qubit system to solve the problem under scrutiny in n-dimensional vector space. The general algorithm to reshape many of the existing quantum algorithms, and to propose a novel quantum algorithms and protocols based on entanglement measurement is proposed in thispaper. © 2018 NSP Natural sciences Publishing Cor.

关键词： Concurrence Entanglement Quantum algorithms Quantum processor manufacturing

Prospects and results from the AFP detector in ATLAS

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arXiv 2017年

作者： Gach, Grzegorz AGH University of Science and Technology Faculty of Physics and Applied Computer Science al. Mickiewicza 30 CracowPL-30059 Poland

In 2016 one arm of the AFP detector was installed and first data have been taken. In parallel with integration of the AFP subdetector into the ATLAS TDAQ and DCS systems, beam tests and preparations for the installation of the 2nd arm are performed. In this report, a status of the AFP project in the ATLAS experiment is discussed. Copyright © 2017, The Authors. All rights reserved.

关键词：

Pseudorapidity profile of transverse momentum uctuations in heavy ion collisions

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arXiv 2017年

作者： Chatterjee, Sandeep Bozeky, Piotr AGH University of Science and Technology Faculty of Physics and Applied Computer Science al. Mickiewicza 30 Krakow30-059 Poland

We investigate pseudorapidity correlations of the average transverse ow of particles emitted in relativistic heavy-ion collisions. We employ 3+1 dimensional viscous relativistic hydrodynamics with initial conditions from the quark Glauber Monte Carlo model to confront the recent measurements on the pseudorapidity correlations of the transverse momentum uctuations in Pb+Pb collisions at p sNN = 2760 GeV. We find good agreement between the model predictions and data. Further, we study two other observables build with the covariance of the average transverse momentum in different rapidity bins. These observables have better stability under various systematics, thus allowing for a robust comparison between data and model. The transverse ow-transverse ow correlation coeficient is directly related to correlations of the underlying collective ow at different pseudorapidities. The 3-bin measure of pT factorization breaking in pseudorapidity gives an estimate of possible decorrelation of the average transverse ow in the longitudinal direction. Copyright © 2017, The Authors. All rights reserved.

关键词： Colliding beam accelerators

Physical modeling of hot forging of cast and P/M Ti-6Al-4V alloy 26

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Physical modeling of hot forging of cast and P/M Ti-6Al-4V a...

26th International Conference on Metallurgy and Materials, METAL 2017

作者： Zygula, Krystian Śleboda, Tomasz Wojtaszek, Marek Korpala, Grzegorz AGH University of Science and Technology Faculty of Metals Engineering and Industrial Computer Science Cracow Poland Technische Universität Bergakademie Freiberg Institut für Metallformung Freiberg Germany

ISBN: (纸本)9788087294796

Titanium alloys such as Ti-6Al-4V are applied in production of structural parts mainly in aircraft and automotive industry, mostly due to favorable relationships between density and mechanical properties as well as good corrosion and crack resistance. Nowadays the most common process of plastic deformation of this material at the industry is hot forging. In search of cost reduction, powder metallurgy method is very promising, because of potential benefits like more precise control of process parameters. In this respect, determining the parameters of thermo-mechanical processing is crucial due to low formability of Ti-6Al-4V alloy. This paper presents the results of the physical modeling of hot forging of cast and P/M Ti-6Al-4V alloy. Both types of the billets were subjected to hot compression tests using the Bähr MDS 830 thermo-mechanical simulator, under various thermal and strain-rate conditions. The microstructures of the samples manufactured by casting and machined from the compacts were observed and compared after deformation. Moreover, the results of the hardness measurements shown the relationships between the conditions of hot deformation and strengthening of the materials. In the result of the investigations, the favorable combinations of thermo-mechanical parameters of Ti-6Al-4V alloy processing were determined. © 2017 TANGER Ltd., Ostrava.

关键词： Microstructure