MIMO-OFDM Based Energy Harvesting Cooperative Communications Using Coalitional Game Algorithm

This document is the Accepted Manuscript version. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.In this paper, we consider the problem of cooperative communication between relays and base station in an advanced MIMO-OFDM framework, under the assumption that the relays are supplied by electric power drawn from energy harvesting (EH) sources. In particular, we focus on the relay selection, with the goal to guarantee the required performance in terms of capacity. In order to maximize the data throughput under the EH constraint, we model the transmission scheme as a non-transferable coalition formation game, with characteristic function based on an approximated capacity expression. Then, we introduce a powerful mathematical tool inherent to coalitional game theory, namely: the Shapley value (Sv) to provide a reliable solution concept to the game. The selected relays will form a virtual dynamically-configuredMIMO network that is able to transmit data to destination using efficient space-time coding techniques. Numerical results, obtained by simulating the EH-powered cooperativeMIMO-OFDMtransmission with Algebraic Space-Time Coding (ASTC), prove that the proposed coalitional game-based relay selection allows to achieve performance very close to that obtained by the same system operated by guaranteed power supply. The proposed methodology is finally compared with some recent related state-of-the-art techniques showing clear advantages in terms of link performance and goodput.Peer reviewe

Liga portuguesa de futebol profissional – recommendations to marketing plan: initiatives to raise the affluence on lPFP games

JEL: M31- Marketing, Z20 – Sports Economics - GeneralThe thesis project is based on a subject that is one of the main problems on the football in Portugal – the low affluences. Nowadays, Portuguese football attendances are very low and this constitutes a huge problem for the sports sector in Portugal. Competitions organized by Liga Portuguesa de Futebol Professional (LPFP), have (in average) low attendance values. LPFP is the entity who rules professional football in Portugal and is responsible for the professional competitions in Portugal – Primeira Liga, Segunda Liga and Taça da Liga. All of these 3 competitions have been facing some problems in terms of low values of affluences. With that the Portuguese football is losing some notoriety and value towards other competitions in Europe. The project will answer to the main problems of this situation with a set of initiatives englobed as recommendations to the marketing plan of LPFP. The initiatives will be created regarding a deep analysis of the internal and external environment of LPFP combined with a marketing strategy with targeting, positioning, segmentation and creating a set of initiatives that will answer the main problems. The results of the thesis will be forwarded to LPFP, hopping to be considered, for the good of Portuguese football.Este projeto de tese é baseado num dos maiores problemas do Futebol em Portugal – As fracas afluências. Hoje em dia, as afluências aos estádios portugueses são muito baixas e isto representa um grande problema para o futebol e Portugal. As competições organizadas pela Liga Portuguesa de Futebol Profissional (LPFP), têm em média valores muito reduzidos de afluência. LPFP é a entidade que gera todo o Futebol profissional em Portugal e é responsável pela realização das comeptições profissionais de futebol em Portugal – Primeira Liga, Segunda Liga e Taça da Liga. Todas as 3 competições têm sofrido problemas com as fracas afluências. Com isto, o futebol português está a perder notoriedade e valor quando comparado com as outras ligas europeias. Este projeto irá responder aos principais problemas desta questão criando um conjunto de iniciativas que servirão de recomendações para o actual palno de marketing da LPFP. As iniciativas serão criadas segundo uma profunda análise interna e externa da situação da LPFP aliando a uma estratégia de marketing fundamentada com posicionamento, segmentação e target, dando resposta aos problemas encontrados. Os resultado deste projeto será enviado para a LPFP, esperando uma apreciação por parte da entidade para o bem do futebol português

Eleven Sports : delivering customer value through a different positioning

In 2018, Eleven Sports decided to enter the Portuguese market of football matches broadcast with the acquisition of some of the major European football leagues. With a low pricing strategy and a different communication strategy, Eleven Sports seeks to achieve a competitive advantage through a different positioning in the industry. This study aims to understand if this different positioning is creating more customer value, and if that is enough to generate a sustainable competitive advantage. To answer this, I have examined the perception of the customer on the Eleven Sports’ service through the conduction of two surveys and two focus groups. The findings show that Eleven Sports’ strategy is perceived well by the customers, however, it is not enough for them to change from Sport TV to Eleven Sports. Findings show that what sells the most are the leagues where Portuguese teams are playing, hence the firm who owns the Portuguese league will own the market.Em 2018, a Eleven Sports decidiu entrar no mercado português da transmissão de jogos de futebol, por meio da aquisição de algumas das principais ligas de futebol europeias. Com uma estratégia de preços baixos, a Eleven Sports procura obter uma vantagem competitiva através de um posicionamento diferente das empresas que atualmente compõem o setor. Este estudo procura entender se esse posicionamento diferente está a gerar mais valor para o consumidor, e se esse valor é suficiente para gerar uma vantagem competitiva. Para responder a isso, examinei a perceção do consumidor em relação ao serviço da Eleven Sports, através da realização de dois questionários e dois Focus Groups. Os resultados mostram que a estratégia da Eleven Sports é bem recebida pelos consumidores, mas não é suficiente para eles mudarem da Sport TV para a Eleven Sports. Os resultados mostram que o que mais vende em Portugal são as ligas em que as equipas portuguesas estão a jogar, pelo que a empresa detentora dos direitos da Liga Portuguesa será dona do mercado

A Repeated Game Formulation of Energy-Efficient Decentralized Power Control

Decentralized multiple access channels where each transmitter wants to selfishly maximize his transmission energy-efficiency are considered. Transmitters are assumed to choose freely their power control policy and interact (through multiuser interference) several times. It is shown that the corresponding conflict of interest can have a predictable outcome, namely a finitely or discounted repeated game equilibrium. Remarkably, it is shown that this equilibrium is Pareto-efficient under reasonable sufficient conditions and the corresponding decentralized power control policies can be implemented under realistic information assumptions: only individual channel state information and a public signal are required to implement the equilibrium strategies. Explicit equilibrium conditions are derived in terms of minimum number of game stages or maximum discount factor. Both analytical and simulation results are provided to compare the performance of the proposed power control policies with those already existing and exploiting the same information assumptions namely, those derived for the one-shot and Stackelberg games.Comment: 25 pages, 5 figures, accepted for publication in IEEE Transaction on Wireless Communicatio

Agent Based Simulation Seas Evaluation of DoDAF Architecture

With Department of Defense (DoD) weapon systems being deeply rooted in the command, control, communications, computers, intelligence, surveillance, and reconnaissance (C4ISR) structure, it is necessary for combat models to capture C4ISR effects in order to properly assess military worth. Unlike many DoD legacy combat models, the agent based model System Effectiveness and Analysis Simulation (SEAS) is identified as having C4ISR analysis capabilities. In lieu of requirements for all new DoD C4ISR weapon systems to be placed within a DoD Architectural Framework (DoDAF), investigation of means to export data from the Framework to the combat model SEAS began. Through operational, system, and technical views, the DoDAF provides a consistent format for new weapon systems to be compared and evaluated. Little research has been conducted to show how to create an executable model of an actual DoD weapon system described by the DoDAF. In collaboration with Systems Engineering masters student Captain Andrew Zinn, this research identified the Aerospace Operation Center (AOC) weapon system architecture, provided by the MITRE Corp., as suitable for translation into SEAS. The collaborative efforts lead to the identification and translation of architectural data products to represent the Time Critical Targeting (TCT) activities of the AOC. A comparison of the AOC weapon system employing these TCT activities with an AOC without TCT capabilities is accomplished within a Kosovo-like engagement (provided by Space and Missile Center Transformations Directorate). Results show statistically significant differences in measures of effectiveness (MOEs) chosen to compare the systems. The comparison also identified the importance of data products not available in this incomplete architecture and makes recommendations for SEAS to be more receptive to DoDAF data products