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  • Noncooperative and cooperative optimization of distributed energy generation and storage in the demand-side of the smart grid

     Atzeni, Italo; Garcia Ordoñez, Luis; Scutari, Gesualdo; Palomar, Daniel P.; Rodriguez Fonollosa, Javier
    IEEE transactions on signal processing
    Date of publication: 2013-05
    Journal article

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    The electric energy distribution infrastructure is undergoing a startling technological evolution with the development of the smart grid concept, which allows more interaction between the supply-and the demand-side of the network and results in a great optimization potential. In this paper, we focus on a smart grid in which the demand-side comprises traditional users as well as users owning some kind of distributed energy source and/or energy storage device. By means of a day-ahead demand-side management mechanism regulated through an independent central unit, the latter users are interested in reducing their monetary expense by producing or storing energy rather than just purchasing their energy needs from the grid. Using a general energy pricing model, we tackle the grid optimization design from two different perspectives: a user-oriented optimization and an holistic-based design. In the former case, we optimize each user individually by formulating the grid optimization problem as a noncooperative game, whose solution analysis is addressed building on the theory of variational inequalities. In the latter case, we focus instead on the joint optimization of the whole system, allowing some cooperation among the users. For both formulations, we devise distributed and iterative algorithms providing the optimal production/storage strategies of the users, along with their convergence properties. Among all, the proposed algorithms preserve the users' privacy and require very limited signaling with the central unit.

  • Demand-side management via distributed energy generation and storage optimization

     Atzeni, Italo; Garcia Ordoñez, Luis; Scutari, Gesualdo; Palomar, Daniel P.; Rodriguez Fonollosa, Javier
    IEEE Transactions on Smart Grid
    Date of publication: 2013-06
    Journal article

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    Demand-side management, together with the integration of distributed energy generation and storage, are considered increasingly essential elements for implementing the smart grid concept and balancing massive energy production from renewable sources. We focus on a smart grid in which the demand-side comprises traditional users as well as users owning some kind of distributed energy sources and/or energy storage devices. By means of a day-ahead optimization process regulated by an independent central unit, the latter users intend to reduce their monetary energy expense by producing or storing energy rather than just purchasing their energy needs from the grid. In this paper, we formulate the resulting grid optimization problem as a noncooperative game and analyze the existence of optimal strategies. Furthermore, we present a distributed algorithm to be run on the users' smart meters, which provides the optimal production and/or storage strategies, while preserving the privacy of the users and minimizing the required signaling with the central unit. Finally, the proposed day-ahead optimization is tested in a realistic situation.

  • Rate balancing in the vector BC with erroneous CSI at the receivers

     Joham, Michael; Gründinger, Andreas; Pastore, Adriano; Rodriguez Fonollosa, Javier; Utschick, Wolfgang
    Conference on Information Sciences and Systems
    Presentation's date: 2013
    Presentation of work at congresses

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    For the vector broadcast channel (BC), the case of erroneous channel state information (CSI) at the receiver is considered. Employing a well established lower bound for the mutual information with Gaussian signaling, a rate balancing problem is formulated where the rates of the different users are maximized under a transmit power constraint, but the rates of the different users have fixed ratios. A duality w.r.t. the signal-to-interference-and-noise ratio (SINR) between the vector BC with erroneous receiver CSI and an appropriately constructed vector multiple access channel (MAC) is established. Based on the observation that an interference function can be defined in the dual vector MAC that is standard, an iterative algorithm can be found for an appropriately formulated quality-of-service (QoS) optimization that is used for solving the balancing problem.

  • Sharpened capacity lower bounds of fading MIMO channels with imperfect CSI

     Pastore, Adriano; Hoydis, Jakob; Rodriguez Fonollosa, Javier
    IEEE International Symposium on Information Theory
    Presentation's date: 2013-07-11
    Presentation of work at congresses

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    A well-established capacity lower bound of multipleinput multiple-output (MIMO) single-user fading channels operating with imperfect receiver-side channel-state information (CSI) is improved using a simple rate-splitting and successive-decoding scheme. The potential improvement is shown to increase with the number of allowed decoding steps (layers) to such extent that the best layering strategy is approached in the limit as the number of layers tends to infinity. We give a general analytic expression of this limit, which constitutes a new capacity lower bound that is sharper than the conventional bound. Using large random matrix theory, we derive an asymptotic approximation of this novel bound, which is shown via numerical simulation to be highly accurate over the whole range of signal-to-noise ratios.

  • Cooperative day-ahead bidding strategies for demand-side expected cost minimization

     Atzeni, Italo; Garcia Ordoñez, Luis; Scutari, Gesualdo; Palomar, Daniel P.; Rodriguez Fonollosa, Javier
    IEEE International Conference on Acoustics, Speech, and Signal Processing
    Presentation's date: 2013-05-30
    Presentation of work at congresses

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    The envisioned smart grid aims to improve the interaction between the supply-side and demand-side of the network, resulting in a great optimization potential. In this paper, we propose an holisticbased, fully distributed day-ahead DSM method where active users, i.e., subscribers participating actively in the bidding process, are interested in accurately deriving the bidding strategies that minimize their expected monetary expense and simultaneously optimize eventual energy generation and storage strategies. With this objective in mind, such users are allowed to collaborate in order to increase their saving with respect to the correspondent user-oriented optimization. Under this setup, we devise a cooperative, distributed, and iterative algorithm providing the optimal bidding, production, and storage strategies of the users, along with its convergence properties.

  • Day-ahead bidding strategies for demand-side expected cost minimization

     Atzeni, Italo; Garcia Ordoñez, Luis; Scutari, Gesualdo; Palomar, Daniel P.; Rodriguez Fonollosa, Javier
    IEEE International Conference on Smart Grid Communications
    Presentation's date: 2012-11-05
    Presentation of work at congresses

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    Day-ahead DSM techniques in the smart grid allow the supply-side to know in advance an estimation of the amount of energy to be provided to the demand-side during the upcoming day. However, a pure day-ahead optimization process cannot accommodate potential real-time deviations from the expected energy consumption by the demand-side users, neither the randomness of their renewable sources. This paper proposes a day-ahead bidding system based on a pricing model that combines: i) a price per unit of energy depending on the day-ahead bid energy needs of the demand-side users, and ii) a penalty system that limits the real-time fluctuations around the bid energy loads. In this day-ahead bidding process, demand-side users, possibly having energy production and storage capabilities, are interested in minimizing their expected monetary expense. The resulting optimization problem is formulated as a noncooperative game and is solved by means of suitable distributed algorithms. Finally, the proposed procedure is tested in a realistic setup.

    Day-ahead DSM techniques in the smart grid allow the supply-side to know in advance an estimation of the amount of energy to be provided to the demand-side during the upcoming day. However, a pure day-ahead optimization process cannot accommodate potential real-time deviations from the expected energy consumption by the demand-side users, neither the randomness of their renewable sources. This paper proposes a day-ahead bidding system based on a pricing model that combines: i) a price per unit of energy depending on the day-ahead bid energy needs of the demand-side users, and ii) a penalty system that limits the real-time fluctuations around the bid energy loads. In this day-ahead bidding process, demand-side users, possibly having energy production and storage capabilities, are interested in minimizing their expected monetary expense. The resulting optimization problem is formulated as a noncooperative game and is solved by means of suitable distributed algorithms. Finally, the proposed procedure is tested in a realistic setup.

  • Improved capacity lower bounds for fading channels with imperfect CSI using rate splitting

     Pastore, Adriano; Koch, Tobias; Rodriguez Fonollosa, Javier
    IEEE Convention of Electrical and Electronics Engineers in Israel
    Presentation's date: 2012-11-15
    Presentation of work at congresses

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  • Optimal pilot design and power control in correlated MISO links

     Pastore, Adriano; Rodriguez Fonollosa, Javier
    IEEE International Conference on Communications
    Presentation's date: 2012-06-14
    Presentation of work at congresses

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    We study the maximization of an achievable ergodic rate expression of a multiple-input single-output (MISO) channel where both ends are cognizant of the same erroneous estimate of the current fading state, yet they have complete knowledge of channel statistics. A training procedure estimates each channel state by means of dedicated pilot symbols whose sum energy is fixed, while for data transmission a fixed average energy per channel access (i.e., average power) is available. The optimization consists, on one hand, in finding the optimal beamforming strategy and temporal power control policy, and on the other hand, in optimally constructing the pilot sequence according to the channel's correlation structure.

  • Array gain in the DMT framework for MIMO channels

     Garcia Ordoñez, Luis; Palomar, Daniel P.; Rodriguez Fonollosa, Javier
    IEEE transactions on information theory
    Date of publication: 2012
    Journal article

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    Following the seminal work by Zheng and Tse on the diversity and multiplexing tradeoff (DMT) of multiple-input multiple-output (MIMO) channels, in this paper, we introduce the array gain to investigate the fundamental relation between transmission rate and reliability inMIMO systems. The array gain gives information on the power offset that results from exploiting channel state information at the transmitter or as a consequence of the channel model. Hence, the diversity, multiplexing, and array gain (DMA) analysis is able to cope with the limitations of the original DMT and provide an operational meaning in the sense that the DMA gains of a particular system can be directly translated into a parameterized characterization of its associated outage probability performance. In this paper, we derive the best DMA gains achievable by any scheme employing isotropic signaling in uncorrelated Rayleigh, semicorrelated Rayleigh, and uncorrelated Rician block-fading MIMO channels. We use these results to analyze the effect of important channel parameters on the outage performance at different points of the DMT curve.

  • Distributed Consensus Algorithms for Wireless Sensor Networks Convergence Analysis and Optimization

     Silva Pereira, Silvana
    Defense's date: 2012-01-26
    Department of Signal Theory and Communications, Universitat Politècnica de Catalunya
    Theses

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  • On a rate region approximation of MIMO channels under partial CSI

     Pastore, A.; Joham, Michael; Rodriguez Fonollosa, Javier
    International ITG Workshop on Smart Antennas
    Presentation's date: 2011
    Presentation of work at congresses

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    When the receiver of a multiple-input multiple-output (MIMO) channel does not know the channel state, but only a linear estimate thereof, the rates achieved with (suboptimal) Gaussian codebooks become difficult to compute. However, one can resort to upper and lower bounds known from literature. Extending the ideas of earlier works on the resource allocation (time and energy) between pilot and data symbols, we first show that, at high SNR, the optimal training length is min(M,N) (where M and N are the number of receive and transmit antennas), and that in no case more than half the coherence time should be used for training. By simple arguments, we show that the basic training scheme-which allocates separate time slots for training and data transmission-achieves the diversity-multiplexing tradeoff of block-fading channels. In a second part, we propose a generalization of the mutual information bounds to inner and outer rate region bounds of the multiple-access channel.

  • Decentralized weighted sum rate maximization in MIMO-OFDMA femtocell networks

     Agustin de Dios, Adrian; Vidal Manzano, Jose; Muñoz Medina, Olga; Rodriguez Fonollosa, Javier
    IEEE Global Communications Conference
    Presentation's date: 2011-12
    Presentation of work at congresses

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    We propose a decentralized strategy for downlink interference management in overlaid MIMO femtocell-macrocell deployments operating in the same band under OFDMA access. The resource allocation, consisting of MIMO precoders at the macro base station (MBS) and femto access points (FAPs) and possibly the resource block (RB) assignment, is designed to maximize the Weighted Sum Rate (WSR) of the system. Being the overall problem non-convex, we propose to solve it in a decentralized way where each transmitter designs its resource allocation using interference prices exchanged with other transmitters (FAPs and MBS) by exploiting the wired backhaul connection. The problem includes a rate restriction per FAP that accounts for the limited bitrate provided by the Internet Service Provider (ISP) wired backhaul. Two efficient algorithms are provided for: 1) optimizing MIMO precoders and 2) optimizing both MIMO precoders and RB assignment. Numerical results compare decentralized strategies based on pricing exchange and on pure competition in dense FAP deployments.

  • Joint pilot and precoder design for optimal throughput

     Pastore, A.; Joham, Michael; Rodriguez Fonollosa, Javier
    IEEE International Symposium on Information Theory
    Presentation's date: 2011-08-01
    Presentation of work at congresses

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  • Fundamental diversity, multiplexing, and array gain tradeoff under different MIMO channel models

     Garcia Ordoñez, Luis; Pérez Palomar, Daniel; Rodriguez Fonollosa, Javier
    IEEE International Conference on Acoustics, Speech and Signal Processing
    Presentation's date: 2011-05-25
    Presentation of work at congresses

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    Following the seminal work of Zheng and Tse on the diversity and multiplexing tradeoff (DMT) of MIMO channels, in this paper we introduce the array gain to investigate the fundamental relation between transmission rate and reliability in MIMO systems. The array gain gives information on the power offset that results from exploiting channel state information at the transmitter or as a consequence of the channel model. Hence, the diversity, multiplexing, and array gain (DMA) analysis can be directly translated into a parameterized characterization of its associated outage probability performance. In this paper we derive the fundamental DMA tradeoff achievable by any scheme in uncorrelated Rayleigh, semicorrelated Rayleigh, and uncorrelated Rician block-fading MIMO channels. We use these results to analyze the effect of important channel parameters in the outage performance at different points of the DMT curve.

  • DMA tradeoff for the MIMO static half-duplex relay

     Garcia Ordoñez, Luis; Pérez Palomar, Daniel; Rodriguez Fonollosa, Javier
    IEEE International Workshop on Signal Processing Advances in Wireless Communications
    Presentation's date: 2011-06-28
    Presentation of work at congresses

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    The diversity and multiplexing tradeoff (DMT) has been extensively applied in the literature to compare the high-SNR outage performance of relaying techniques and to propose new design guidelines. The problem with this approach is that the DMT provides only a coarse measure of performance and, hence, it is more convenient to adopt the diversity, multiplexing, and array gain (DMA) framework, in which the error probability is characterized by two parameters: the diversity gain (associated with the SNR exponent) and the array gain (related to the SNR offset). In this paper, we derive the DMA tradeoff associated with the cut-set bound outage probability of the static half-duplex MIMO relay under uncorrelated/semicorrelated Rayleigh fading and uncorrelated Rician fading. This provides an upper bound to the DMA tradeoff achievable by any relaying scheme.

  • On a mutual information and a capacity bound gap of pilot-aided MIMO channels

     Pastore, A.; Joham, Michael; Rodriguez Fonollosa, Javier
    IEEE International Conference on Communications
    Presentation's date: 2011-06-08
    Presentation of work at congresses

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  • Balancing egoistic and altruistic transmit beamforming in femtocell networks

     Husso, Mika; Dowhuszko, Alexis; Hamalainen, K.; Pastore, A.; Rodriguez Fonollosa, Javier
    Future Network and MobileSummit
    Presentation's date: 2011-06-15
    Presentation of work at congresses

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  • Macrocelulas y Femtocelulas en Sistemas con Técnicas Avanzadas de Coordinación de la Interferencia y Cooperación

     Vidal Manzano, Jose; Rodriguez Fonollosa, Javier; Cabrera Bean, Margarita Asuncion; Fernandez Rubio, Juan-antonio; Pages Zamora, Alba Maria; Agustin de Dios, Adrian; Silva Pereira, Silvana; Garcia Ordoñez, Luis; Vila Valls, Jordi; Muñoz Medina, Olga
    Participation in a competitive project

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  • Access to the full text
    FREEDOM Project. Interference coordination protocols in femto-based networks  Open access

     Agustin de Dios, Adrian; Muñoz Medina, Olga; Vidal Manzano, Jose; Goldhamer, M.; Rodriguez Fonollosa, Javier; Pastore, A.; Sardellitti, Stefania; Pescosolido, Loreto; di Lorenzo, Paolo; Barbarossa, Sergio; Baiocchi, Andrea; de Marinis, Enrico; Imponente, Giovanni; Pucci, Fabrizio; Rosi, Guido
    Date: 2011-11-28
    Report

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    This document looks into coordinated radio resource allocation algorithms in deployments of huge number of femto-access points (FAP) by exploiting the message exchange at control-plane level through the wired ISP backhaul link. The algorithms present in this document are based on decentralized cooperative strategies supported by Game Theory. Decentralized resource allocation algorithms based on price exchange have been derived under different criteria: guaranteeing a minimum rate with the minimum power, maximizing the weighted sum-rate of the system, maximizing the opportunistic throughput when there are different source of randomness like random link failures and noise quantization or when the activity of macro-users is not known by FAPs (coordinated channel sensing or modelling the activity). Additionally, a genetic-based resource allocation is investigated, providing centralized and decentralized algorithms, to which the Game Theory solutions are challenged. In all cases, the techniques derived require modifications of the current LTE-A standard which are identified. Finally, some of those algorithms have been evaluated in a Realistic corporate scenario elucidating the advantages of coordinated resource allocation techniques proposed.

    Postprint (author’s final draft)

  • MÉTODO Y SISTEMA PARA LA GESTIÓN DESCENTRALIZADA DE FEMTOCÉLULAS VECINAS

     Rodriguez Fonollosa, Javier; Agustin de Dios, Adrian; Vidal Manzano, Jose; Muñoz Medina, Olga
    Date of request: 2011-11-28
    Invention patent

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    Método y sistema para la gestión descentralizada de femtocélulas vecinas.

    El método comprende:

    - la comunicación, a una primera femtocélula desde una segunda femtocélula, de la siguiente información:

    i) la restricción de requerimientos de interferencia de un usuario activo de la segunda femtocélula, y

    ii) uno o más parámetros que caracterizan un canal radio físico definido desde la primera femtocélula hasta dicho al menos un usuario activo de la segunda femtocélula;

    - la autoconfiguración de los parámetros de transmisión de la primera femtocélula usando la información comunicada i) y ii).

    El sistema está configurado para implementar el método de la invención.

  • Access to the full text
    On the diversity, multiplexing, and array gain tradeoff in MIMO channels  Open access

     Garcia Ordoñez, Luis; Pérez Palomar, Daniel; Rodriguez Fonollosa, Javier
    IEEE International Symposium on Information Theory
    Presentation's date: 2010-06-15
    Presentation of work at congresses

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    Following the seminal work of Zheng and Tse on the diversity and multiplexing tradeoff (DMT) of MIMO channels, in this paper we introduce the array gain to further investigate the fundamental relation between transmission rate and reliability in MIMO systems. The array gain gives information on the power offset that results from exploiting channel state information at the transmitter or, simply, because of the channel model. Hence, the diversity, multiplexing, and array gain (DMA) tradeoff is able to cope with the limitations of the original DMT and provide with operational meaning in the sense that the DMA tradeoff of a particular system can be directly translated into a parameterized characterization of its associated outage probability performance. As a first step towards this objective, we present in this paper the fundamental DMA tradeoff achievable by any scheme in uncorrelated Rayleigh block-fading MIMO channels.

  • On the computation of the capacity region of the discrete MAC

     Calvo, Eduard; Pérez Palomar, Daniel; Rodriguez Fonollosa, Javier; Vidal Manzano, Jose
    IEEE transactions on communications
    Date of publication: 2010-12
    Journal article

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  • Toward a reconfigurable MIMO downlink air interface and radio resource management: the SURFACE concept

     Kovacs, István Zsolt; Garcia Ordoñez, Luis; Navarro, M.; Calvo, Eduard; Rodriguez Fonollosa, Javier
    IEEE communications magazine
    Date of publication: 2010-06
    Journal article

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  • FEMTOCELL-BASED NETWORK ENHANCEMENT BY INTERFERENCE MANAGEMENT AND COORDINATION OF INFORMATION FOR SEAMLESS CONNECTIVITY

     Muñoz Medina, Olga; Rodriguez Fonollosa, Javier; Agustin de Dios, Adrian; Fernandez Rubio, Juan-antonio; Vidal Manzano, Jose
    Participation in a competitive project

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  • INTERFERENCE IN WIRELESS NETWORKS: Cancelation, Impact, Practical Management, and Complexity.

     Calvo Page, Eduardo
    Defense's date: 2009-01-26
    Department of Signal Theory and Communications, Universitat Politècnica de Catalunya
    Theses

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  • Access to the full text
    On the totally asynchronous interference channel with single-user receivers  Open access

     Calvo Page, Eduard; Rodriguez Fonollosa, Javier; Vidal Manzano, Jose
    IEEE International Symposium on Information Theory
    Presentation's date: 2009-07-03
    Presentation of work at congresses

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    The performance characterization of decentralized wireless networks with uncoordinated sender-destination pairs motivates the study of the totally asynchronous interference channel with single-user receivers. Since this channel is not information stable, its capacity region is determined resorting to information density, although more amenable single-letter inner and outer bounds are provided as well. Aiming at numerical evaluation of the achievable rates, we subsequently concentrate on the inner bound for the Gaussian case. We show that taking Gaussian inputs is not the best choice in general and derive analytical conditions under which other input distributions may be optimal. Essentially, these conditions require the channel to be interference-limited. Finally, the existence of such non-Gaussian distributions with superior performance is validated numerically in different scenarios.

  • Ordered Eigenvalues of a General Class of Hermitian Random Matrices With Application to the Performance Analysis of MIMO System

     Ordonez, LG; Palomar, Daniel P.; Rodriguez Fonollosa, Javier; Garcia Ordoñez, Luis
    IEEE transactions on signal processing
    Date of publication: 2009-02
    Journal article

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  • Optimal Resource Allocation in Relay-Assisted Cellular Networks With Partial CSI

     Calvo, E; Vidal Manzano, Jose; Rodriguez Fonollosa, Javier
    IEEE transactions on signal processing
    Date of publication: 2009-07
    Journal article

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  • Minimum BER Linear MIMO Transceivers With Adaptive Number of Substreams

     Ordonez, LG; Palomar, Daniel P.; Pages Zamora, Alba Maria; Rodriguez Fonollosa, Javier; Garcia Ordoñez, Luis
    IEEE transactions on signal processing
    Date of publication: 2009-06
    Journal article

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  • Performance Limits of Spatial Multiplexing MIMO Systems  awarded activity

     Garcia Ordoñez, Luis
    Defense's date: 2009-05-06
    Department of Signal Theory and Communications, Universitat Politècnica de Catalunya
    Theses

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  • PROCESSAMENT DEL SENYAL EN COMUNICACIONS

     Rey Micolau, Francesc; Villares Piera, N. Javier; Vazquez Grau, Gregorio; Riba Sagarra, Jaume; Vidal Manzano, Jose; Cabrera Bean, Margarita Asuncion; Garcia Ordoñez, Luis; Rodriguez Fonollosa, Javier; Ramirez Javega, Francisco; Muñoz Medina, Olga; Matas Navarro, David; Font Segura, Josep; Silva Pereira, Silvana; Agustin de Dios, Adrian; Fernandez Rubio, Juan-antonio; Lamarca Orozco, M. Meritxell; Pages Zamora, Alba Maria; Sala Alvarez, Jose
    Participation in a competitive project

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  • A Reconfigurable Downlink Air Interface: Design, Simulation Methodology, and Performance Evaluation

     Eduard, Calvo; István, Z Kovacs; Garcia Ordoñez, Luis; Rodriguez Fonollosa, Javier
    17th ICT Mobile and Wireless Communications Summit (ICT 2008)
    Presentation of work at congresses

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  • Diversity and multiplexing tradeoff of spatial multiplexing MIMO systems with CSI

     Garcia Ordoñez, Luis; Pages Zamora, Alba Maria; Rodriguez Fonollosa, Javier
    IEEE transactions on information theory
    Date of publication: 2008-07
    Journal article

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  • Contribución de las técnicas de diversidad en transmisión para sistemas de comunicaciones móviles de tercera generación

     Carrasco Espinosa, Hector
    Defense's date: 2008-11-10
    Department of Signal Theory and Communications, Universitat Politècnica de Catalunya
    Theses

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  • Foundations and Methodologies for Future Communication and Sensor Networks (COMONSENS)

     Pages Zamora, Alba Maria; Rodriguez Fonollosa, Javier; Muñoz Medina, Olga; Vidal Manzano, Jose; Cabrera Bean, Margarita Asuncion; Fernandez Rubio, Juan-antonio; Rey Micolau, Francesc; Villares Piera, N. Javier; Vazquez Grau, Gregorio; Lamarca Orozco, M. Meritxell; Sala Alvarez, Jose; Riba Sagarra, Jaume
    Participation in a competitive project

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  • FINANÇAMENT PER ELABORACIÓ DE PROJECTES ADREÇATS AL 7PM

     Rodriguez Fonollosa, Javier
    Participation in a competitive project

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  • SELF-OPTIMIZING DISTRIBUTED AND COOPERATIVE NETWORKS (SONNET)

     Rodriguez Fonollosa, Javier
    Participation in a competitive project

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  • Transmit and Receive Architecture Development and Algorithmic Implementation

     István, Z Kovács (NSN); Garcia Ordoñez, Luis; Eduard, Calvo (UPC); Rodriguez Fonollosa, Javier; Sorensen, Troels B (AAU)
    Date: 2008-07
    Report

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  • Ordered Eigenvalues of a General Class of Hermitian Random Matrices and Performance Analysis of MIMO Systems

     Garcia Ordoñez, Luis; Palomar, Daniel Pérez; Rodriguez Fonollosa, Javier
    IEEE International Conference on Communications
    Presentation of work at congresses

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  • The computation of the capacity region of the discrete degraded BC is a nonconvex DC problem

     Eduard, Calvo; Palomar, Daniel P.; Rodriguez Fonollosa, Javier; Vidal Manzano, Jose
    2008 IEEE International Symposium on Information Theory
    Presentation of work at congresses

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  • A Reconfigurable Downlink Air Interface: Design, Simulation Methodology, and Performance Evaluation

     Rodriguez Fonollosa, Javier
    17th ICT Mobile and Wireless Communications Summit (ICT 2008)
    Presentation's date: 2008-06-10
    Presentation of work at congresses

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  • Near-optimal joint power and rate allocation for OFDMA broadcast channels

     Calvo Page, Eduardo; Rodriguez Fonollosa, Javier
    IEEE International Conference on Acoustics, Speech, and Signal Processing
    Presentation of work at congresses

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  • On Equal Constellation Minimum BER Linear MIMO Transceivers

     Garcia Ordoñez, Luis; Palomar, Daniel P.; Pages Zamora, Alba Maria; Rodriguez Fonollosa, Javier
    IEEE International Conference on Acoustics, Speech, and Signal Processing
    Presentation of work at congresses

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  • On the Design of Minimum BER Linear MIMO Transceivers with Perfect or Partial Channel State Information

     Garcia Ordoñez, Luis; Pages Zamora, Alba Maria; Rodriguez Fonollosa, Javier
    16th IST Mobile & Wireless Communication Summit
    Presentation of work at congresses

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  • High-SNR Analytical Performance of Spatial Multiplexing MIMO Systems With CSI

     Garcia Ordoñez, Luis; Palomar, Daniel P.; Pages Zamora, Alba Maria; Rodriguez Fonollosa, Javier
    IEEE transactions on signal processing
    Date of publication: 2007-11
    Journal article

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  • Resource Allocation in Multihop OFDMA Broadcast Networks

     Calvo Page, Eduardo; Vidal Manzano, Jose; Rodriguez Fonollosa, Javier
    8th IEEE Workshop on Signal Processing Advances in Wireless Communications
    Presentation of work at congresses

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  • D4.1. Preliminary Design of the Multi-User Optimal Transmit and Receive Strategy

     Calvo Page, Eduardo; Garcia Ordoñez, Luis; Rodriguez Fonollosa, Javier; Pages Zamora, Alba Maria; Sorensen, T B; Lin, Z; Figueiredo, D V P; Kovacs, I Z; Fasano, A; Barbarossa, S; Pescosolido, L; Scutari, G; Baiocchi, A
    Date: 2007-01
    Report

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  • D4.2. Design of the Multi-User Optimal Transmit and Receive Strategy

     Calvo Page, Eduardo; Garcia Ordoñez, Luis; Rodriguez Fonollosa, Javier; Pages Zamora, Alba Maria; Sørensen, T B; Lin, Z; Figueiredo, D V P; Kovács, I Z; Barbarossa, S; Fasano, A; Pescosolido, L; Scutari, G; Baiocchi, A; et, al
    Date: 2007-07
    Report

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  • D7.1. Definition of the link-to-system level interface

     Canto, R; Warzanskyj, W; Kovács, I Z; Sørensen, T B; Pages Zamora, Alba Maria; Rodriguez Fonollosa, Javier; Garcia Ordoñez, Luis; Calvo Page, Eduardo
    Date: 2007-01
    Report

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  • Efficient Resource Allocation for Orthogonal Transmission in Broadcast Channels

     Calvo Page, Eduardo; Rodriguez Fonollosa, Javier
    8th IEEE Workshop on Signal Processing Advances in Wireless Communications
    Presentation of work at congresses

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