Exploració per tema "Fast Fourier transforms"

Ara es mostren els items 1-9 de 9

    • A study of the communication cost of the FFT on torus multicomputers 

      Díaz de Cerio Ripalda, Luis Manuel; Valero García, Miguel; González Colás, Antonio María (Institute of Electrical and Electronics Engineers (IEEE), 1995)
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      The computation of a one-dimensional FFT on a c-dimensional torus multicomputer is analyzed. Different approaches are proposed which differ in the way they use the interconnection network. The first approach is based on ...

    • AIterative algorithm for microwave imaging using the cgm-fft and the pseudoinverse method 

      Mallorquí Franquet, Jordi Joan; Llorens, V (Institute of Electrical and Electronics Engineers (IEEE), 1994)
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      Within biomedical microwave tomography, a spatial iterative method for the reconstruction of the complex permittivity of inhomogeneous lossy dielectric objects with arbitrary shape from their scattered electric field is ...

    • Benchmarking CPUs and GPUs on embedded platforms for software receiver usage 

      Pany, T.; Dampf, J.; Bär, W.; Winkel, J.; Stöber, C.; Fürlinger, K.; Closas Gómez, Pau; García Molina, J. A. (2015)
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      Smartphones containing multi-core central processing units (CPUs) and powerful many-core graphics processing units (GPUs) bring supercomputing technology into your pocket (or into our embedded devices). This can be exploited ...

    • Memory aware poisson solver for peta-scale simulations with one FFT diagonalizable direction 

      Oyarzun Altamirano, Guillermo; Borrell Pol, Ricard; Trias Miquel, Francesc Xavier; Oliva Llena, Asensio (Institute of Electrical and Electronics Engineers (IEEE), 2017)
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      Problems with some sort of divergence constraint are found in many disciplines: computational fluid dynamics, linear elasticity and electrostatics are examples thereof. Such a constraint leads to a Poisson equation which ...

    • New FTT bit-reversal algorithm 

      Rius Casals, Juan Manuel; Porrata-Dòria i Yagüe, Ramir de (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 1995-04-01)
      Article
      Accés obert
      This correspondence presents a very short, simple, easy to understand bit-reversal algorithm for radix-2 fast Fourier transform (FFT), which is, furthermore, easily extendable to radix-M. In addition, when implemented ...

    • Specific 2-D spectral estimation for wideband beamforming 

      Lagunas Hernandez, Miguel A.; Vázquez Grau, Gregorio; Sitjar, J F (Institute of Electrical and Electronics Engineers (IEEE), 1990)
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    • The cgm and the fdtd for sar studies 

      Pous Andrés, Rafael; Mallorquí Franquet, Jordi Joan; Bayonas, F (Institute of Electrical and Electronics Engineers (IEEE), 1994)
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      In the study of electromagnetic radiation effects over dielectric bodies, effective numerical methods are needed. At present, there is a lack of tools for measuring these effects and due to the huge growth of microwave ...

    • The Xor embedding: An embedding of hypercubes onto rings and toruses 

      González Colás, Antonio María; Valero García, Miguel (Institute of Electrical and Electronics Engineers (IEEE), 1993)
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      Many parallel algorithms use hypercubes as the communication topology among processes, which make them suitable to be executed on a hypercube multicomputer. In this way the communication cost is kept to a minimum since ...

    • Ultrashort pulse characterisation with SHG collinear-FROG 

      Amat Roldán, Iván; Cormack, Iain G.; Loza Álvarez, Pablo; Gualda Manzano, Emilio José; Artigas García, David (2004-03)
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      We outline criteria for fast and accurate acquisition of collinear FROG (CFROG) trace and how it can be transformed into the more traditional noncollinear FROG trace. The CFROG has an intrinsically simple geometry that ...