Listar GI-GTEC - Artigos por autor "Suárez-Casal, Pedro"

Mostrando ítems 1-14 de 14

    • A Real-Time Implementation of the Mobile WiMAX ARQ and Physical Layer 

      Suárez-Casal, Pedro; Carro Lagoa, Ángel; García-Naya, José A.; Fraga-Lamas, Paula; Castedo, Luis; Morales-Méndez, Antonio (Springer, 2015)
      [Abstract] This paper presents an innovative software-defined radio architecture for the real-time implementation of WiMAX transceivers. The architecture consists of commercially available field-programmable gate array and ...

    • Analog Transmission of Correlated Sources Over BC With Distortion Balancing 

      Suárez-Casal, Pedro; Fresnedo, Óscar; Castedo, Luis; Garcia-Frias, Javier (Institute of Electrical and Electronics Engineers, 2017-11)
      [Abstract]: Analog transmission of correlated information over Gaussian broadcast channels (BCs) using analog joint source- channel coding (JSCC) is addressed. This communication strategy has attractive advantages, such ...

    • Analog Transmission of Correlated Sources Over Fading SIMO Multiple Access Channels 

      Suárez-Casal, Pedro; Fresnedo, Óscar; Castedo, Luis; Garcia-Frias, Javier (Institute of Electrical and Electronics Engineers, 2017-07)
      [Abstract]: Joint source-channel coding for discrete-time analog sources is an appealing transmission approach because of its extremely low delay and complexity. When the users access the channel orthogonally, analog ...

    • Analog Transmission of Spatio-Temporal Correlated Sources Over MAC With Modulo Mappings 

      Suárez-Casal, Pedro; Fresnedo, Óscar; Castedo, Luis (Institute of Electrical and Electronics Engineers, 2018-05)
      [Abstract]: Modulo mappings is an appealing scheme for the analog transmission of spatially correlated discrete-time analog source symbols over multiple access channels. In this letter, we show that the modulo mappings are ...

    • Design and implementation of an OFDMA-TDD physical layer for WiMAX applications 

      Carro Lagoa, Ángel; Suárez-Casal, Pedro; García-Naya, José A.; Fraga-Lamas, Paula; Castedo, Luis; Morales-Méndez, Antonio (SpringerOpen & European Association for Signal Processing, 2013)
      [Abstract]: This work describes the design, implementation, and performance evaluation of an orthogonal frequency division multiple access (OFDMA) time-division duplexing (TDD) physical layer (PHY) compliant with the ...

    • Design of Linear Precoders for Correlated Sources in MIMO Multiple Access Channels 

      Suárez-Casal, Pedro; González-Coma, José P.; Fresnedo, Óscar; Castedo, Luis (Institute of Electrical and Electronics Engineers, 2018-12)
      [Abstract]: This paper focuses on distributed linear precoding when users transmit correlated information over a fading multiple-input and multiple-output multiple access channel. The precoders are optimized in order to ...

    • Environmental Cross-Validation of NLOS Machine Learning Classification/Mitigation with Low-Cost UWB Positioning Systems 

      Barral Vales, Valentín; Escudero, Carlos J.; García-Naya, José A.; Suárez-Casal, Pedro (M D P I AG, 2019-12-10)
      [Abstract] Indoor positioning systems based on radio frequency inherently present multipath-related phenomena. This causes ranging systems such as ultra-wideband (UWB) to lose accuracy when detecting secondary propagation ...

    • Estimation of Laplacian Symbols for Analog Transmission Over MIMO Channels 

      Suárez-Casal, Pedro; Fresnedo, Óscar; Castedo, Luis (Institute of Electrical and Electronics Engineers, 2015-12)
      [Abstract]: The MAP and MMSE estimation of Laplace-distributed symbols transmitted over multiple-input multiple-output channels is studied. This is an important problem in analog joint source channel coding with spiral ...

    • Experimental evaluation of the WiMAX downlink physical layer in high-mobility scenarios 

      Suárez-Casal, Pedro; Rodríguez Piñeiro, José; García-Naya, José A.; Castedo, Luis (SpringerOpen & European Association for Signal Processing, 2015)
      [Abstract]: The experimental evaluation of the WiMAX downlink physical layer in high-mobility scenarios is extremely difficult to carry out because it requires the realization of measurement campaigns with expensive ...

    • 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 ...

    • Lattice-Based Analog Mappings for Low-Latency Wireless Sensor Networks 

      Suárez-Casal, Pedro; Fresnedo, Óscar; Pérez-Adán, Darian; Castedo, Luis (Institute of Electrical and Electronics Engineers, 2023-10-01)
      [Abstract]: We consider the transmission of spatially correlated analog information in a wireless sensor network (WSN) through fading single-input and multiple-output (SIMO) multiple access channels (MACs) with low-latency ...

    • Multi-Sensor Accurate Forklift Location and Tracking Simulation in Industrial Indoor Environments 

      Barral Vales, Valentín; Suárez-Casal, Pedro; Escudero, Carlos J.; García-Naya, José A. (M D P I AG, 2019-10-12)
      [Abstract] Location and tracking needs are becoming more prominent in industrial environments nowadays. Process optimization, traceability or safety are some of the topics where a positioning system can operate to improve ...

    • Transmission of Analog Information Over the Multiple Access Relay Channel Using Zero-Delay Non-Linear Mappings 

      Fresnedo, Óscar; Suárez-Casal, Pedro; Castedo, Luis (Institute of Electrical and Electronics Engineers, 2019-04-04)
      [Abstract]: We consider the zero-delay encoding of discrete-time analog information over the Multiple Access Relay Channel (MARC) using non-linear mapping functions. On the one hand, zero-delay non-linear mappings are ...

    • Transmission of Spatio-Temporal Correlated Sources Over Fading Multiple Access Channels With DQLC Mappings 

      Fresnedo, Óscar; Suárez-Casal, Pedro; Castedo, Luis (Institute of Electrical and Electronics Engineers, 2019-08)
      [Abstract]: The design of zero-delay Joint Source-Channel Coding (JSCC) schemes for the transmission of correlated information over fading Multiple Access Channels (MACs) is an interesting problem for many communication ...