86 documents found, page 1 of 9

WTHC: Wine tourism clustering and future directions

Wine tourism is growing worldwide, assuming a significant share of overall tourism and hospitality; therefore, scholars are attracted to understanding what drives wine tourists’ behaviours. This study aims to analyse and cluster wine tourism research and propose directions for future research. A systematic literature review followed by a text-mining approach explored conceptual developments in wine tourism and ...

On Deep Learning Hybrid Architectures for MIMO-OFDM Channel Estimation

Traditional estimation methods face challenges in adverse conditions in systems such as Multiple Input Multiple Output (MIMO) with Orthogonal Frequency Division Multiplexing (OFDM). To overcome those challenges, Deep Learning (DL) approaches have been proposed as an interesting alternative, thanks to their ability to capture channel features without much complexity. This paper presents a hybrid approach that co...

Advanced Channel Decomposition Techniques in OTFS

In this paper, we propose a multi-user downlink system for two users based on the orthogonal time frequency space (OTFS) modulation scheme. The design leverages the generalized singular value decomposition (GSVD) of the channels between the base station and the two users, applying precoding and detection matrices based on the right and left singular vectors, respectively. We derive the analytical expressions fo...

Quasi-Optimum Detection for a Wide Class of Digital Signals With Strong Nonline...

Most of the signals widely employed in wireless communications can have significant envelope fluctuations that make them very prone to nonlinear (NL) effects, leading to significant performance degradation when conventional receivers (designed for ideal linear conditions) are utilized. However, if optimum maximum likelihood (ML) receivers are employed, NL effects do not necessarily lead to performance degradati...

Autarquias Locais e Desporto: Financiamento Público dos Municípios ao Desporto ...

RESUMO: Sem a formulação e implementação de políticas públicas de desporto nas autarquias locais que financiem o setor, o desporto não sobreviveria em Portugal. Em muitos municípios portugueses, os níveis de financiamento ao desporto ainda se encontram aquém das necessidades e expetativas das populações. Este trabalho científico tem como objetivo geral a análise dos níveis de financiamento ao desporto nos Munic...

On the Performance of LDPC-Coded Large Intelligent Antenna System

Should robots be taxed?

Using a quantitative model that features technical progress in automation and endogenous skill choice, we show that, given the current U.S. tax system, a sustained fall in automation costs can lead to a massive rise in income inequality. We characterize the optimal tax system in this model. We find that it is optimal to tax robots while the current generations of routine workers, who can no longer move to non-r...

Cross-cultural validation of Quebec user satisfaction with assistive technology...

Assistive technologies (ATs) are resources to promote the independence and participation of people with a disability. The use of standardized tools, based on outcome measures, is essential for guaranteeing high-quality rates. The Quebec User Evaluation of Satisfaction with AT–2.0 (QUEST) is a scale to assess the satisfaction of people using any AT. Objectives: To translate and culturally validate the QUEST–2.0 ...

A Low Complexity Channel Estimation and Detection for Massive MIMO Using SC-FDE

5G Communications will support millimeter waves (mm-Wave), alongside the conventional centimeter waves, which will enable much higher throughputs and facilitate the employment of hundreds or thousands of antenna elements, commonly referred to as massive Multiple Input–Multiple Output (MIMO) systems. This article proposes and studies an efficient low complexity receiver that jointly performs channel estimation b...

On the 5G and beyond

This article provides an overview of the fifth generation of cellular communications (5G) and beyond. It presents the transmission techniques of current 5G communications and those expected of future developments, namely a brief study of non-orthogonal multiple access (NOMA) using the single carrier with frequency domain equalization (SC-FDE) block transmission technique, evidencing its added value in terms of ...