Browsing by Author "Lozano Solsona, Angel"

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  • 1-bit MIMO for terahertz channels
    Lozano Solsona, Angel (Institute of Electrical and Electronics Engineers (IEEE), 2021)
    This paper tackles the problem of multiple-input multiple-output communication with 1-bit digital-to-analog and analog-to-digital converters. With the information-theoretic capacity as benchmark, the complementary strategies ...
  • 3GPP LTE and LTE-Advanced
    Clerckx, Bruno; Lozano Solsona, Angel; Sesia, Stefania; van Rensburg, Cornelius; Papadias, Constantinos B. (Hindawi, 2009)
  • A novel approach for spectral efficiency analysis in MIMO cellular networks
    George, Geordie; Mungara, Ratheesh K.; Lozano Solsona, Angel; Haenggi, Martin (Institute of Electrical and Electronics Engineers (IEEE), 2017)
    The application of stochastic geometry to the analysis of wireless networks is shown to be propelled by (i) a clean separation of time scales, (ii) abstraction of small-scale effects via ergodicity, and (iii) an interference ...
  • A unified treatment of optimum pilot overhead in multipath fading channels
    Jindal, Nihar; Lozano Solsona, Angel (Institute of Electrical and Electronics Engineers (IEEE), 2010)
    The optimization of the pilot overhead in single-user wireless fading channels is investigated, and the dependence of this overhead on various system parameters of interest (e.g., fading rate, signal-to-noise ratio) is ...
  • A WiMAX-based implementation of network MIMO for indoor wireless systems
    Venkatesan, Sivarama; Huang, Howard C.; Lozano Solsona, Angel; Valenzuela, R. A. (Hindawi, 2009)
    It is well known that multiple-input multiple-output (MIMO) techniques can bring numerous benefits, such as higher spectral efficiency, to point-to-point wireless links. More recently, there has been interest in extending ...
  • An analytical framework for device-to-device communication in cellular networks
    George, Geordie; Mungara, Ratheesh K.; Lozano Solsona, Angel (Institute of Electrical and Electronics Engineers (IEEE), 2015)
    This paper presents a framework that enables/ncharacterizing analytically the spectral efficiency achievable by/nD2D (device-to-device) communication integrated with a cellular/nnetwork. This framework is based on a ...
  • Analytical Characterization of ITLinQ: Channel Allocation for Device-to-Device Communication Networks
    Mungara, Ratheesh K.; Zhang, Xinchen; Lozano Solsona, Angel; Heath, Robert W. (Institute of Electrical and Electronics Engineers (IEEE), 2016)
    Device-to-device (D2D) communication allows serving local wireless traffic bypassing the system’s/ninfrastructure. One way to control the interference in D2D networks is to carefully channelize/ntransmissions. This paper ...
  • Analytical handle for ZF reception in distributed massive MIMO
    Senanayake, Rajitha; Lozano Solsona, Angel; Smith, Peter; Evans, Jamie (Institute of Electrical and Electronics Engineers (IEEE), 2016)
    This paper considers distributed massive MIMO networks where a large number of antennas, either collocated or geographically scattered over a region, communicate with mobile users. This communication is impaired by ...
  • Antenna subset modulation for secure millimeter-wave wireless communication
    Valliappan, Nachiappan; Lozano Solsona, Angel; Heath, R. W., Jr. (Institute of Electrical and Electronics Engineers (IEEE), 2013)
    The small carrier wavelength at millimeter-wave (mm-Wave) frequencies enables the implementation/nof a large number of co-located antennas. This paper exploits the potential of large antenna arrays at these/nfrequencies ...
  • Approaching the MIMO capacity with a low-rate feedback channel in V-BLAST
    Chung, Seong Taek; Lozano Solsona, Angel; Huang, Howard C.; Sutivong, Arak; Cioffi, John M. (Hindawi, 2004)
    This paper presents an extension of the vertical Bell Laboratories Layered Space-Time (V-BLAST) architecture in which the closed-loop multiple-input multiple-output (MIMO) capacity can be approached with conventional scalar ...
  • Are yesterday’s information-theoretic fading models and performance metrics adequate for the analysis of today’s wireless systems?
    Lozano Solsona, Angel; Jindal, Nihar (Institute of Electrical and Electronics Engineers (IEEE), 2012)
    The purpose of this paper is to examine some of the models commonly used to represent/nfading as well as the information-theoretic metrics most commonly used to evaluate performance/nover those models. We raise the question ...
  • Bit loading for MIMO with statistical channel information at the transmitter and MMSE receivers
    Hong, Li; Garcia Armada, Ana; Lozano Solsona, Angel (Institute of Electrical and Electronics Engineers (IEEE), 2012)
    Bit and power loading schemes for a single-user multiple-input multiple-output channel using a minimum mean-square error receiver are proposed. Such schemes are derived without the benefit of instantaneous channel state ...
  • Bit loading for MIMO with statistical channel information at the transmitter and ZF receivers
    García Armada, Ana; Hong, Li; Lozano Solsona, Angel (Institute of Electrical and Electronics Engineers (IEEE), 2009)
    For single-user MIMO communication with uncoded and coded QAM signals, we propose bit and power loading schemes that rely only on channel distribution information at the transmitter. To that end, we develop the relationship ...
  • Capacity of line-of-sight MIMO channels
    Do, Heedong; Lee, Namyoon; Lozano Solsona, Angel (Institute of Electrical and Electronics Engineers (IEEE), 2020)
    We establish an upper bound on the informationtheoretic capacity of line-of-sight (LOS) multiantenna channels with arbitrary antenna arrangements and identify array structures that, properly configured, can attain at least ...
  • Capacity to within one bit of a class of Gaussian multicast channels with interference
    Sridharan, Sriram; Lozano Solsona, Angel; Viswanathan, Harish; Vishwanath, Sriram (Institute of Electrical and Electronics Engineers (IEEE), 2008)
    This paper studies the fundamental operational limits of a class of Gaussian multicast channels with an interference setting. In particular, the paper considers two base stations multicasting separate messages to distinct ...
  • Capacity-achieving input covariance for single-user multi-antenna channels
    Tulino, Antonia M.; Lozano Solsona, Angel; Verdú, Sergio (Institute of Electrical and Electronics Engineers (IEEE), 2006)
    We characterize the capacity-achieving input covariance for multi-antenna channels known instantaneously at the receiver and in distribution at the transmitter. Our characterization, valid for arbitrary numbers of antennas, ...
  • Capacity-approaching rate function for layered multiantenna architectures
    Lozano Solsona, Angel (Institute of Electrical and Electronics Engineers (IEEE), 2003)
    The simultaneous use of multiple transmit and receive antennas can unleash very large capacity increases in rich multipath environments. Although such capacities can be approached by layered multi-antenna architectures ...
  • Cell-free UAV networks: asymptotic analysis and deployment optimization
    Diaz-Vilor, Carles; Lozano Solsona, Angel; Jafarkhani, Hamid (Institute of Electrical and Electronics Engineers (IEEE), 2023)
    Recently, cell-free (CF) architectures, in which every user can potentially communicate with every base station, have received a lot of attention. This paper considers the uplink of fully and partially centralized CF ...
  • Comprehensive evaluation of the IEEE 802.15.4 MAC layer performance with retransmissions
    Faridi, Azadeh; Palattella, Maria Rita; Lozano Solsona, Angel; Dohler, Mischa; Boggia, Gennaro; Grieco, Luigi Alfredo; Camarda, Pietro (Institute of Electrical and Electronics Engineers (IEEE), 2010)
    Supported by IEEE 802.15.4 standardization activities, embedded networks have been gaining popularity in recent years. The focus of this paper is to quantify the behavior of key networking metrics of IEEE 802.15.4 ...
  • Computation-bandwidth trading for mobile edge computing
    Gupta, Sabyasachi; Lozano Solsona, Angel (Institute of Electrical and Electronics Engineers (IEEE), 2019)
    We consider the problem of mobile computation offloading to both an edge cloud and to peer devices, and propose bandwidth incentives for those peer devices. Based on this idea, we formulate a joint optimization of the share ...