SPCOM - Grup de Recerca de Processament del Senyal i Comunicacions

 

Desenvolupament i anàlisi de tècniques avançades de processament digital del senyal amb èmfasi en la seva aplicació a sistemes de comunicacions i/o localització. Àrees d'interès especial són les comunicacions sense fils en tots els seus àmbits, des del personal, local i cel·lular i ampliant el seu abast fins a les comunicacions per satèl·lit i d'espai profund, així com els sistemes de localització adequats a tots aquests entorns. Les tècniques en les quals el grup acumula una experiència considerable i en què és previsible una participació més significativa en el futur són les següents: disseny de sistemes de comunicacions per satèl·lit avançats, desenvolupament de sistemes de comunicacions sense fils amb múltiples antenes en transmissió i/o recepció, desenvolupament de sistemes avançats de localització i navegació i optimització d'esquemes d’assignació de recursos per a sistemes i xarxes de comunicacions sense fils no centralitzades.

Development and analysis of advanced signal processing techniques with emphasis on their application to communication and location systems. Wireless communication networks at the personal, local and cellular levels up to satellite and deep space communications constitute areas of special interest, as well as location and navigation systems adequate to these environments. The fields in which our research group enjoys considerably experience and in which we will foreseeably be engaged in the future are the following: design of advanced satellite communication systems, development of wireless communication systems with multiple transmitting/receiving antennas, development of advanced location and navigation systems and optimization of resource allocation schemes for decentralized wireless communication systems and networks.

Recent Submissions

  • Polar coding for confidential broadcasting 

    Olmo Alòs, Jaume del; Rodríguez Fonollosa, Javier (2020-01-27)
    Article
    Open Access
    A polar coding scheme is proposed for the Wiretap Broadcast Channel with two legitimate receivers and one eavesdropper. We consider a model in which the transmitter wishes to send the same private (non-confidential) message ...

  • Approximations of the aggregated interference statistics for outage analysis in massive MTC 

    Liesegang Maria, Sergi; Pascual Iserte, Antonio; Muñoz Medina, Olga (Multidisciplinary Digital Publishing Institute (MDPI), 2019-12)
    Article
    Open Access
    This paper presents several analytic closed-form approximations of the aggregated interference statistics within the framework of uplink massive machine-type-communications (mMTC), taking into account the random activity ...

  • Matrix completion and extrapolation via kernel regression 

    Giménez Febrer, Pedro Juan; Pagès Zamora, Alba Maria; Giannakis, Georgios B. (2019-10-01)
    Article
    Open Access
    Matrix completion and extrapolation (MCEX) are dealt with here over reproducing kernel Hilbert spaces (RKHSs) in order to account for prior information present in the available data. Aiming at a fast and low-complexity ...

  • Decentralized shaping for pilot generation and detection in opportunistic communications 

    Borràs Pino, Jordi; Vázquez Grau, Gregorio (Institute of Electrical and Electronics Engineers (IEEE), 2019)
    Conference report
    Restricted access - publisher's policy
    The uncoordinated design of pulse shaping filters for opportunistic communications is addressed. We show that under degrees-of-freedom sensing uncertainties the waveform design problem can be cast as a minimum-norm ...

  • Distributed feedback-aided subspace concurrent opportunistic communications 

    Borràs Pino, Jordi; Vázquez Grau, Gregorio (Institute of Electrical and Electronics Engineers (IEEE), 2019)
    Conference lecture
    Restricted access - publisher's policy
    This paper deals with the distributed subspace agreement problem for opportunistic communications in time division duplex (TDD) distributed networks. Since scenario-adapted opportunistic transmission schemes rely on locally ...

  • Low-complexity switching network design for hybrid precoding in mmWave MIMO systems 

    Molina Oliveras, Francesc; Borràs Pino, Jordi (Institute of Electrical and Electronics Engineers (IEEE), 2019)
    Conference report
    Restricted access - publisher's policy
    This paper deals with the design of a hybrid precoder for millimeter-wave MIMO systems. For the sake of concreteness, we consider an analog processing stage composed of a switching network with analog combining. The main ...

  • Energy efficient transmit-receive spatial modulation for uplink-downlink large-scale MIMO systems 

    Raafat Hosny Mohamed Fahm, Ahmed; Yüzgeçcioglu, Merve; Zahid Aslam, Mohammed; Agustín de Dios, Adrián; Vidal Manzano, José; Jorswieck, Eduard Axel; Corre, Yoann (2018)
    Conference report
    Restricted access - publisher's policy
    Energy efficient spatial modulation-aided uplink and downlink designs for future millimeterwave (mmWave) large-scale multiple-input multiple-output (MIMO) systems are considered. Two novel uplink transceivers are proposed ...

  • Wideband receive spatial modulation with time domain pre-equalizer for large MIMO systems 

    Raafat Hosny Mohamed Fahm, Ahmed; Agustín de Dios, Adrián; Vidal Manzano, José (2018)
    Conference report
    Open Access
    Receive spatial modulation (RSM) schemes are promising for massive multiple-input-multiple-output (MIMO) systems at millimeter wave (mmWave) bands because they require reduced complexity and low consumption hardware at the ...

  • Channel-aware energy allocation for throughput maximization in massive low-rate multiple access 

    Molina Oliveras, Francesc; Sala Álvarez, José; Rey Micolau, Francesc; Villares Piera, Nemesio Javier (Institute of Electrical and Electronics Engineers (IEEE), 2019)
    Conference report
    Restricted access - publisher's policy
    A multiple access (MA) optimization technique for massive low-rate direct-sequence spread spectrum communications is analyzed in this work. A dense network of users transmitting at the same rate to a common central node ...

  • Decentralized random energy allocation for massive non-orthogonal code-division multiple access 

    Molina Oliveras, Francesc; Villares Piera, Nemesio Javier; Rey Micolau, Francesc; Sala Álvarez, José (2019-10-07)
    Article
    Open Access
    This work studies the spectral efficiency achievable when a very large number of terminals are connected simultaneously to a central node (uplink) through independent and identically-distributed flat-fading channels. ...

  • Average PER performance metrics of iterative successive interference cancellation 

    Molina Oliveras, Francesc; Sala Álvarez, José (2019-09-16)
    Article
    Open Access
    The average packet error rate (PER) and user-PER profiles of iterative successive interference cancellation (I-SIC) are analyzed for a proof-of-concept scenario where asymptotically many code-division-multiple-access users ...

  • A proof of de Bruijn identity based on generalized Price’s theorem 

    Riba Sagarra, Jaume; Cabrera Estanyol, Ferran de (Institute of Electrical and Electronics Engineers (IEEE), 2019)
    Conference lecture
    Restricted access - publisher's policy
    This paper shows that de Bruijn identity, which relates entropy with Fisher information, can be obtained as a particular case of an immediate generalization of Price’s theorem, which is a tool used in the analysis of ...

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