Listar Grupo de Tecnoloxía Electrónica e Comunicacións (GTEC) por data de publicación
Mostrando ítems 41-60 de 218
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Measuring the physical layer performance of wireless communication systems: Part 33 in a series of tutorials on instrumentation and measurement
(Institute of Electrical and Electronics Engineers & Instrumentation and Measurement Society, 2011-10)[Abstract]: Measuring the physical layer performance of wireless radio communication systems is one important step in clearly understanding their behavior in real-world, that is, non-simulation, environments. Unfortunately, ... -
Performance of MIMO systems in measured indoor channels with transmitter noise
(Springer, 2012)This study analyzes the impact of transmitter noise on the performance of multiple-input multiple-output (MIMO) systems with linear and nonlinear receivers and precoders. We show that the performance of MIMO linear and ... -
Robust Precoding with Limited Feedback Design based on Precoding MSE for MU-MISO Systems
(Institute of Electrical and Electronics Engineers, 2012-06)[Abstract] For the separation of the signals in the vector broadcast channel (BC), some information about the channel state is necessary at the transmitter. In many cases, this channel state information (CSI) must be fed ... -
Equalizers in mobile communications: Tutorial 38
(Institute of Electrical and Electronics Engineers & Instrumentation and Measurement Society, 2012-06)[Abstract]: Modern cellular wireless systems would not be possible without high-performance equalizers. Signal impairments introduced by the wireless channel can only be compensated for by using such equalizers. This ... -
Architecture for Multi-Technology Real-Time Location Systems
(Multidisciplinary Digital Publishing Institute, 2013)[Abstract]The rising popularity of location-based services has prompted considerable research in the field of indoor location systems. Since there is no single technology to support these systems, it is necessary to consider ... -
Real-time validation of a SDR implementation of TDD WiMAX standard
(The Wireless Innovation Forum, 2013)[Abstract]: This paper focuses on the validation of an innovative software- defined radio architecture for a WiMAX system based on commercially available field-programmable gate array and digital signal processor modules. ... -
Design and implementation of an OFDMA-TDD physical layer for WiMAX applications
(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 ... -
Evaluation of H.264/AVC over IEEE 802.11p vehicular networks
(SpringerOpen & European Association for Signal Processing, 2013)[Abstract]: The capacity of vehicular networks to offer non-safety services, like infotainment applications or the exchange of multimedia information between vehicles, have attracted a great deal of attention to the field ... -
Real-time multimedia coding and transmission
(SpringerOpen & European Association for Signal Processing, 2013)[Abstract]: This paper sums up relevant topics covered by the special issue titled ‘Real-Time Multimedia Coding and Transmission’, including efficient content representation, multimedia transmission, hardware and software ... -
Low-Complexity Near-Optimal Decoding for Analog Joint Source Channel Coding Using Space-Filling Curves
(Institute of Electrical and Electronics Engineers, 2013-04)[Abstract]: Analog Joint Source-Channel Coding (JSCC) is a communication strategy that does not follow the separation principle of conventional digital systems but approaches the optimal distortion-cost tradeoff over AWGN ... -
Testbed-Assisted Learning for Digital Communications Courses
(John Wiley & Sons, 2013-09)[Abstract] We introduce testbed-assisted learning as an effective means for teaching digital communications. Laboratory teaching activities of digital communications courses benefit very much from utilizing a hardware ... -
A low-cost decision-aided channel estimation method for Alamouti OSTBC
(Springer, 2013-11)[Abstract] In wireless communication systems, channel state information (CSI) acquisition is typically performed at the receiver side every time a new frame is received, without taking into account whether it is really ... -
Circularly Polarized Arrays of Sequentially Crossed Dipoles
(Genxcellence Software Pvt. Ltd., 2013-11)[Abstract] Usual configurations of dipoles that radiate circularly polarized fields consist of elements arranged in crossed pairs, with one component of each pair in top of the other component. As an alternative to this, ... -
On the Feasibility of Time-Modulated Arrays for Digital Linear Modulations: a Theoretical Analysis
(Institute of Electrical and Electronics Engineers, 2014)[Abstract] Wireless communications are widely based on linear digital modulation methods, which introduce the digital baseband information in the amplitude and/or in the phase of a carrier sinusoid. Time-modulated arrays, ... -
Broadband Access in Complex Environments: LTE on Railway
(Institute of Electronics, Information and Communication Engineers, 2014)[Abstract]: This paper assesses the main challenges associated with the propagation and channel modeling of broadband radio systems in a complex environment of high speed and metropolitan railways. These challenges comprise ... -
Analog joint source-channel coding over MIMO channels
(SpringerOpen & European Association for Signal Processing, 2014-02)[Abstract]: Analog joint source-channel coding (JSCC) is a communication strategy that does not follow the separation principle of conventional digital systems but has been shown to approach the optimal distortion-cost ... -
Detection of channel variations to improve channel estimation methods
(Springer, 2014-08)[Abstract] In current digital communication systems, channel information is typically acquired by supervised approaches that use pilot symbols included in the transmit frames. Given that pilot symbols do not convey user ... -
Vehicle Classification using the Discrete Fourier Transform with Traffic Inductive Sensors
(Multidisciplinary Digital Publishing Institute, 2015)[Abstract] Inductive Loop Detectors (ILDs) are the most commonly used sensors in traffic management systems. This paper shows that some spectral features extracted from the Fourier Transform (FT) of inductive signatures ... -
A Real-Time Implementation of the Mobile WiMAX ARQ and Physical Layer
(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 ... -
Unleashing the Potential of LTE for Next Generation Railway Communications
(Springer, 2015)[Abstract]: In an increasingly demanding marketplace that will put great strain on railway services, research on broadband wireless communication must continue to strive for improvement. Based on the mature narrowband GSM ...
