ListarICC_Articles por tema "QR factorization"

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    • openAccess   A pipeline structure for the block QR update in digital signal processing 

      Dolz, Manuel F.; Alventosa, Fran J.; Alonso-Jordá, Pedro Springer (2019-03)
      There exist problems in the field of digital signal processing, such as filtering of acoustic signals that require processing a large amount of data in real time. The beamforming algorithm, for instance, is a process that ...

    • closedAccess   Fast block QR update in digital signal processing 

      Alventosa, Fran J.; Alonso-Jordá, Pedro; Vidal, Antonio M.; Piñero, Gema; Quintana-Orti, Enrique S. Springer (2019-03)
      The processing of digital sound signals often requires the computation of the QR factorization of a rectangular system matrix. However, sometimes, only a given (and probably small) part of the system matrix varies from the ...

    • openAccess   High-performance reconstruction of CT medical images by using out-of-core methods in GPU 

      Quintana-Ortí, Gregorio; Chillarón, Mónica; Vidal, Vicente; Verdu, Gumersindo Elsevier (2022-03-02)
      Background and objective:Since Computed Tomography (CT) is one of the most widely used medical imaging tests, it is essential to work on methods that reduce the radiation the patient is exposed to. Although there are several ...

    • closedAccess   Tall-and-skinny QR factorization with approximate Householder reflectors on graphics processors 

      Tomás Domínguez, Andrés Enrique; Quintana-Orti, Enrique S. Springer (2020-01-24)
      We present a novel method for the QR factorization of large tall-and-skinny matrices that introduces an approximation technique for computing the Householder vectors. This approach is very competitive on a hybrid platform ...