This paper extends previous works [1][2][3] in matched filter bounds and provides a theoretical calculation of detection probability of q-ary QAM signals transmitted over the diversity reception and multipath fading ISI channels. The matched filter bounds represent the best attainable detection performance of a particular system, which may or may not be realized with a practical system. While a...

In todays digitized and globalized economy, companies face increasing competitive pressures and unprecedented speed of change in business conditions. Considering limited IT budgets, process owners and IT departments need to decide how to divide their spending on efficiency-enhancing and flexibility-enhancing IT capabilities to optimally support their business processes. Turning from thinking of...

Automated ontology population using information extraction algorithms can produce inconsistent knowledge bases. Confidence values assigned by the extraction algorithms may serve as evidence helping to repair produced inconsistencies. The Dempster-Shafer theory of evidence is a formalism, which allows appropriate interpretation of extractors’ confidence values. The paper presents an algorithm fo...

We develop vector-sensor array processing to estimate the angles-of-arrival (AOAs) and time delays of multipath channels in the space-time-polarization domain. A MUSIC-type algorithm for joint angle and delay estimation with a vector-sensor array is derived. Potential applications include multipath channel estimation and mobile localization. Simulation results show that the space-time-polarizat...

We analyze the algebraic structure of φ 1,2 perturbed minimal models relating them to graph-state models with an underlying Birman-Wenzl-Murakami algebra. Using this approach one can clarify some physical properties and reformulate the bootstrap equations. These are used to calculate the S-matrix elements of higher kinks, and to determine the breather spectrum of the φ 1,2 perturbations of the ...

In this paper we review the most peculiar and interesting information-theoretic and communications features of fading channels. We first describe the statistical models of fading channels which are frequently used in the analysis and design of communication systems. Next, we focus on the information theory of fading channels, by emphasizing capacity as the most important performance measure. Bo...

This paper presents a method for joint channel and data estimation for transmission over frequency–selective and time–variant channels. Hereby, fast time–variant channels can be tracked, which is important for mobile communications at very high velocities. We approach the problem by estimating the scattering function, which is assumed to be limited in delay and Doppler frequency. At the transmi...

This paper addresses the construction of a spontaneous speech corpus in European Portuguese (hereafter EP), the corpus is presented and a prosodic labeling scheme that is here proposed is explained. The objective of this work is to provide a tool for linguistic analysis suitable to several research topics, which have speech and dialogue as objects. The main features considered in the database w...

Hybrid analog-digital beamforming design based on the channel state information (CSI) for wideband millimeter wave channel models receives attention in recent years. However, without the CSI, most previously proposed beamforming methods, such as singular value decomposition (SVD)-based ones, are almost infeasible due to the complexity of both the channel estimation and SVD for large antenna arr...

Recent results in information theory have demonstrated the enormous potential of wireless communication systems with antenna arrays at both the transmitter and receiver. To exploit this potential, a number of layered space–time architectures have been proposed. These layered space–time systems transmit parallel data streams, simultaneously and on the same frequency, in a multiple-input multiple...