Now showing items 1-20 of 22

    • A low-cost decision-aided channel estimation method for Alamouti OSTBC 

      Castro-Castro, Paula-María; Dapena, Adriana; García-Naya, José A.; Labrador, Josmary (Springer, 2013-11)
      [Abstract] In wireless communication systems, channel state information (CSI) acquisition is typically performed at the receiver side every time a new frame is received, without taking into account whether it is really ...
    • A Novel Hybrid Approach to Improve Performance on Frequency Division Duplex Systems with Linear Precoding 

      Castro-Castro, Paula-María; García-Naya, José A.; Iglesia, Daniel; Dapena, Adriana (Springer, 2010)
      [Abstrtact] Linear precoding is an attractive technique to combat interference in multiple-input multiple-output systems because it reduces costs and power consumption in the receiver equipment. Most of the frequency ...
    • A Novel Strategy for Improving the Quality of Embedded Zerotree Wavelet Images Transmitted over Alamouti Coding Systems 

      Labrador, Josmary; Castro-Castro, Paula-María; Pérez-Iglesias, Héctor J.; Dapena, Adriana (Springer, 2011)
      [Abstract] This work deals with the transmission of images, previously coded using the Embedded Zerotree Wavelet (EZW) transform, over wireless systems in which Space-Time Coding (STC) is used. It is shown how the system ...
    • A Prototype of EEG System for IoT 

      Laport, Francisco; Dapena, Adriana; Castro-Castro, Paula-María; Vazquez-Araujo, Francisco J.; Iglesia, Daniel (World Scientific Publishing Co. Pte. Ltd., 2020-05-04)
      [Abstract] In this work, we develop open source hardware and software for eye state classification and integrate it with a protocol for the Internet of Things (IoT). We design and build the hardware using a reduced number ...
    • Adaptación al EEES de las prácticas de Electricidad y Electrónica de la E.T.S. de Náutica y Máquinas de la Universidade da Coruña mediante un diseño basado en competencias 

      Castro-Castro, Paula-María; Dapena, Adriana; García-Naya, José A.; Iglesia, Daniel (Universidade de Vigo, Facultade de Ciencias da Educacion, 2010)
      [Summary] The adaptation to the European Higher Education Area (EHEA) of the subject of Electricity and Electronics at the Escuela Técnica Superior de Náutica y Máquinas of the University of A Coruña requires important ...
    • Aplicación web para evaluación y seguimiento del rendimiento de asignaturas y titulaciones universitarias 

      Dapena, Adriana; García-Naya, José A.; Castro-Castro, Paula-María; Pan, Christopher (Universidade de Vigo, Facultade de Ciencias da Educacion, 2010)
      [Summary] The adaptation of the university studies to the current European Higher Education Area (EHEA) requires the set up of mechanisms, which allow performance evaluation of the subjects compounding the new university ...
    • Calculation of the Connected Dominating Set Considering Vertex Importance Metrics 

      Vázquez Araújo, Francisco Javier; Dapena, Adriana; Souto Salorio, María José; Castro-Castro, Paula-María (M D P I AG, 2018-01-28)
      [Abstract] The computation of a set constituted by few vertices to define a virtual backbone supporting information interchange is a problem that arises in many areas when analysing networks of different natures, like ...
    • Channel estimation techniques for linear precoded systems: Supervised, unsupervised, and hybrid approaches 

      Castro-Castro, Paula-María; García-Naya, José A.; Dapena, Adriana; Iglesia, Daniel (Elsevier, 2011-07)
      [Abstract] Linear precoding is an attractive technique to combat interference in multiple-input multiple-output systems because it reduces cost and power consumption at the receiver. Frequency division duplex systems with ...
    • DASBE: Decision-Aided Semi-Blind Equalization for MIMO Systems with Linear Precoding 

      García-Naya, José A.; Dapena, Adriana; Castro-Castro, Paula-María; Iglesia, Daniel (Akademie Ved Ceske Republiky * Ustav Informatiky, 2010)
      [Abstract] Multiple-Input Multiple-Output (MIMO) digital communications standards usually acquire Channel State Information (CSI) by means of supervised algorithms, which implies a loss of performance since pilot symbols ...
    • Detection of channel variations to improve channel estimation methods 

      Dapena, Adriana; Castro-Castro, Paula-María; García-Naya, José A.; Zarzoso, Vicente (Springer, 2014-08)
      [Abstract] In current digital communication systems, channel information is typically acquired by supervised approaches that use pilot symbols included in the transmit frames. Given that pilot symbols do not convey user ...
    • FDD Channel Estimation Via Covariance Estimation in Wideband Massive MIMO Systems 

      González-Coma, José P.; Suárez-Casal, Pedro; Castro-Castro, Paula-María; Castedo, Luis (M D P I AG, 2019-02-10)
      [Abstract] A method for channel estimation in wideband massive Multiple-Input Multiple-Output systems using hybrid digital analog architectures is developed. The proposed method is useful for Frequency-Division Duplex at ...
    • FDD Channel Estimation Via Covariance Estimation in Wideband Massive MIMO Systems 

      González-Coma, José P.; Suárez-Casal, Pedro; Castro-Castro, Paula-María; Castedo, Luis (M D P I AG, 2020-02-10)
      [Abstract] A method for channel estimation in wideband massive Multiple-Input Multiple-Output systems using hybrid digital analog architectures is developed. The proposed method is useful for Frequency-Division Duplex at ...
    • Hybrid Channel Estimation Strategy for MIMO Systems with Decision Feedback Equalizer 

      Pérez-Iglesias, Héctor J.; Dapena, Adriana; Castro-Castro, Paula-María; García-Naya, José A. (Springer, 2010)
      [Abstract] We propose to combine supervised and unsupervised algorithms in order to improve the performance of multiple-input multiple-output digital communication systems which make use of differential feedback equalizers ...
    • Hybrid Supervised-Unsupervised Channel Estimation Scheme with Dynamic Transmission of Pilots 

      Dapena, Adriana; Castro-Castro, Paula-María; García-Naya, José A. (Springer, 2011-02)
      [Abstract] Multiple-Input Multiple-Output (MIMO) digital communications standards typically include pilot symbols in the definition of the transmit signals with the purpose of acquiring the Channel State Information (CSI) ...
    • New Computation of Resolving Connected Dominating Sets in Weighted Networks 

      Dapena, Adriana; Iglesia, Daniele; Vazquez-Araujo, Francisco J.; Castro-Castro, Paula-María (M D P I AG, 2019-11-29)
      [Abstract] In this paper we focus on the issue related to finding the resolving connected dominating sets (RCDSs) of a graph, denoted by G. The connected dominating set (CDS) is a connected subset of vertices of G selected ...
    • Performance of MIMO systems in measured indoor channels with transmitter noise 

      Castro-Castro, Paula-María; González-Coma, José P.; García-Naya, José A.; Castedo, Luis (Springer, 2012)
      This study analyzes the impact of transmitter noise on the performance of multiple-input multiple-output (MIMO) systems with linear and nonlinear receivers and precoders. We show that the performance of MIMO linear and ...
    • Robust Precoding with Bayesian Error Modeling for Limited Feedback MU-MISO Systems 

      Joham, Michael; Castro-Castro, Paula-María; Castedo, Luis; Wolfgang, Utschick (IEEE, 2010)
      [Abstract] We consider the robust precoder design for multiuser multiple-input single-output (MU-MISO) systems where the channel state information (CSI) is fed back from the single antenna receivers to the centralized ...
    • Robust Precoding with Limited Feedback Design based on Precoding MSE for MU-MISO Systems 

      Joham, Michael; Castro-Castro, Paula-María; Utschick, Wolfgang; Castedo, Luis (Institute of Electrical and Electronics Engineers, 2012-06)
      [Abstract] For the separation of the signals in the vector broadcast channel (BC), some information about the channel state is necessary at the transmitter. In many cases, this channel state information (CSI) must be fed ...
    • SiDIVS: Simple Detection of Inductive Vehicle Signatures with a Multiplex Resonant Sensor 

      Lamas-Seco, José J.; Castro-Castro, Paula-María; Dapena, Adriana; Vázquez Araújo, Francisco Javier (Multidisciplinary Digital Publishing Institute, 2016)
      This work provides a system capable of obtaining simultaneous inductive signatures of vehicles traveling on a roadway with minimal cost. Based on Time-Division Multiplexing (TDM) with multiple oscillators, one for each ...
    • Testbed-Assisted Learning for Digital Communications Courses 

      García-Naya, José A.; Castro-Castro, Paula-María; González-López, Miguel; Dapena, Adriana (John Wiley & Sons, 2013-09)
      [Abstract] We introduce testbed-assisted learning as an effective means for teaching digital communications. Laboratory teaching activities of digital communications courses benefit very much from utilizing a hardware ...