Browsing by Subject "Sistemes MIMO"
Now showing items 1-20 of 80
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5G microwave vs. millimeter-wave MIMO wireless mobile systems
(Universitat Politècnica de Catalunya, 2018-07)
Master thesis
Open AccessThe next generation of wireless systems, 5G, is intended to cover plenty of new emerging applications such as utra-high resolution multimedia systems, industry 4.0, self-driving vehicles and smart cities. All those different ... -
5G network planning and optimisation using Atoll
(Universitat Politècnica de Catalunya, 2019-07)
Master thesis
Open AccessThis thesis consists on the study of some 5G NR key features such as massive MIMO and beamforming and how they are modelled by Atoll, a network design and planning software. For this, a single cell was deployed on a sample ... -
A framework for joint design of pilot sequence and linear precoder
(2016-09-01)
Article
Open AccessMost performance measures of pilot-assisted multiple-input multiple-output systems are functions of the linear precoder and the pilot sequence. A framework for the optimization of these two parameters is proposed, based ... -
A real-time FPGA-based implementation of a high-performance MIMO-OFDM transceiver featuring a closed-loop communication scheme
(Institute of Electrical and Electronics Engineers (IEEE), 2012)
Conference report
Restricted access - publisher's policyIn this paper we present the FPGA implementation of a multi-antenna Orthogonal Frequency-Division Multiplexing (OFDM) transmitter and receiver featuring a closed-loop (CL) communication scheme. The PHY-layer development ... -
Achievable DoF-delay trade-offs for the K-user MIMO interference channel with delayed CSIT
(2016-12-01)
Article
Open AccessThe degrees of freedom (DoFs) of the K-user multiple-input multiple-output (MIMO) interference channel are studied when perfect, but delayed channel state information is available at the transmitter side (delayed CSIT). ... -
Advances in non-radiative resonant inductive coupling wireless power transfer: a comparison of alternative circuit and system models driven by emergent applications
(Institute of Electrical and Electronics Engineers (IEEE), 2014)
Conference report
Restricted access - publisher's policyRecent research in wireless power transfer (WPT) using resonant inductive coupling has demonstrated very high efficiencies at large distances compared to the transmitting element dimensions, thereby increasing the number ... -
Antenna array configurations for massive MIMO outdoor base stations
(Institute of Electrical and Electronics Engineers (IEEE), 2014)
Conference report
Restricted access - publisher's policyMassive MIMO predicts unprecedented capacity and energy efficiency improvements in future networks, by the use of base stations with hundreds of antennas. However the crucial question of determining suitable, or even ... -
Antenna subset selection for spatial modulation: a novel and energy efficient single RF technique
(2013)
Conference report
Restricted access - publisher's policyIn this paper, we propose a closed-loop and single RF multiple-input-multiple-output (MIMO) method, particularly suitable for the Uplink of cellular systems, which is based on the low-complexity and recently devised method ... -
Approximations of the aggregated interference statistics for outage analysis in massive MTC
(Multidisciplinary Digital Publishing Institute (MDPI), 2019-12)
Article
Open AccessThis 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 ... -
Asymptotic analysis of multiuser-MIMO networks with battery-constrained receivers
(2014)
Conference report
Restricted access - publisher's policyIn this paper, we present an asymptotic analysis of the behavior of a network where the mobile terminals are considered to be battery-powered devices provided with energy harvesting capabilities. The asymptotic analysis ... -
Channel training procedures for MIMO interfering point-to-multipoint channel
(2014)
Conference report
Restricted access - publisher's policyA precise knowledge of the MIMO channel between the serving node and the user equipment (UE) is important for attaining good data rates in downlink transmissions (DL) in cellular systems. The interfering point-tomulti ... -
Coexisting linear and widely linear transceivers in the MIMO interference
(2016-01)
Article
Open AccessRecent results have shown the benefits of widely linear precoding (WLP) in the MIMO interference channel (MIMO IC) assuming that all transmitters can follow the same strategy. Motivated by a transitional scenario where ... -
Control no lineal del sistema Twin Rotor
(Universitat Politècnica de Catalunya, 2017-09-13)
Bachelor thesis
Open AccessEl Twin Rotor MIMO System és un sistema mecànic amb múltiples entrades i múltiples sortides assimilable a un helicòpter, però d’escala més reduïda. Una diferència destacable entre el Twin Rotor MIMO System i una maqueta ... -
Control of the twin-rotor system
(Universitat Politècnica de Catalunya, 2010-06)
Master thesis
Open AccessThe problem of Multi-Input-Multi-Output (MIMO) control has always been an interesting sub-field within the field of control. Among the systems that require MIMO control, the helicopter stands out as one of the prominent ... -
Decentralized coordinated precoding for dense TDD small cell networks
(2015-08-01)
Article
Open AccessCellular networks need the densification of small eNBs (SeNBs) to face the tremendous data traffic demand growth, implying an interference increase and making transmit coordination a key enabler. This article proposes a ... -
Decentralized widely linear precoding design for the MIMO interference channel
(2014)
Conference report
Restricted access - publisher's policyhis paper addresses the interference management in a MIMO interference channel (MIMO-IC) by proposing a decentralized transmit and receive beamformer optimization using improper (or circularly asymmetric complex) Gaussian ... -
Degrees of freedom of the rank-deficient MIMO X channel
(2013)
Conference report
Restricted access - publisher's policyThe multiple-input multiple-output (MIMO) X channel with rank-deficient channels is considered. We characterize the total degrees of freedom (DoF) by defining an outer bound which is attained by the proposed precoding ... -
Design and Analysis of Superresolution algorithm and signal separation technique for an OFDM-based MIMO radar
(Universitat Politècnica de Catalunya / Karlsruher Institut für Technology, 2012-10-31)
Master thesis
Open AccessRecently, the concept of MIMO radar has been proposed. MIMO radar has the capability to transmit orthogonal (or incoherent) waveforms at multiple transmit antennas. It offers promising potentials for multipath fading, ... -
Design of pre-coding and combining in hybrid analog-digital massive MIMO with phase noise
(Institute of Electrical and Electronics Engineers (IEEE), 2017)
Conference report
Restricted access - confidentiality agreementThe design of massive MIMO, especially at millimeter waves, requires a trade-off between cost and power consumption, balancing the complexity and the performance in terms of achievable rate. A recent trend in the design ... -
Differential Feedback of MIMO Channel Gram Matrices Based on Geodesic Curves
(2010-12)
Article
Restricted access - publisher's policyThis paper proposes a differential quantization strategy to be used in the feedback link of a multiple-input multiple-output (MIMO) communication system. This algorithm is applied to the channel Gram matrix using geodesic ...
