Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 16 of 16 for “"Cooperative systems"”.
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Adaptive Relay-Selection In Decode-And-Forward Cooperative Systems
In the past few years adaptive decode-and-forward cooperative diversity systems have been studied intensively in literature. Many schemes and protocols have been proposed to enhance the performance of the cooperative systems while trying to alleviate its drawbacks. One of the recent schemes that …
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Human Interactive Mission Manager : an autonomous mission manager for human cooperative systems
Facilitating low level human supervisory control of mission management is highly challenging because of concerns regarding system stability and performance. Previous implementations of mission managers based on C. S. Draper Laboratory?s All-Domain Execution and Planning Technology (ADEPT) are based …
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Energy-Constrained UAV-UGV Cooperative Systems: A Bilevel Framework for Routing in Multi-Agent Teams
… Vehicles (UAVs) has revolutionized autonomous systems by enabling rapid, flexible, and high-resolution operations across domains such as logistics, disaster response, infrastructure inspection, and urban mobility. However, UAV deployment remains constrained by limited energy capacity and …
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Performance analysis of diversity techniques in wireless communication systems: Cooperative systems with CCI and MIMO-OFDM systems
… performance of ecient digital commu- nication systems, the performance analysis includes the bit error rate (BER) of dier- ent binary and M-ary modulation schemes, and the average channel capacity (ACC) under dierent adaptive transmission protocols, namely, the simultaneous power and rate …
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Power allocation for cooperative wireless networks
… multi-antenna system that is known as a cooperative communication system. Our investigation includes the modeling, characterization and optimization of such a system under realistic scenarios. We derive new performance expressions utilizing feasible input distributions and we employ …
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Performance analysis of cooperative relay networks in presence of interference
In the past decade, cooperative communication has emerged as an attractive technique for overcoming the shortcomings of point-to-point wireless communications systems. Cooperative relaying improves the performance of wireless networks by forming an array of multiple independent virtual sources …
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Non-orthogonal random waveform based multiuser communications
… may be exploited. These are applied to cellular systems in Chapter 3, to cooperative systems in Chapter 4 and they are combined with a practical Hybrid Automatic Repeat reQuest (HARQ) system in Chapter 5.<br/>In the cellular system scenario presented in Chapter 3, we discuss three design …
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Contribución a la distribución de contenidos multimedia sobre redes peer-to-peer
… ser aplicada para construir árboles multiflujo. Cooperative systems are deployed over overlay networks in order to share a resource, bandwidth, which up to now has not been widely shared. Those systems build an overlay control network, for the coordination algorithm among the different peers, and …
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Performance Evaluation and Improvement of Wireless Amplify-and-Forward Cooperative-Based Systems under Nodes Mobility and Imperfect CSI Estimation Impacts
Cooperative communication techniques have been introduced in wireless networks to achieve spacial diversity-gain via the readiness of multiple users (via relays) to assist a source forwarding its data to a final destination. Cooperative communication techniques have shown their capability in …
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A Game Theoretic Approach to Resilient Space System Design
… space missions that maintain performance in uncooperative or even adversarial environments. Space system designers must account for resilience to non-cooperative interactions in the design process while trading resilience and performance against cost. Prior academic work has considered …
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Analysis of the Relationships between Changes in Distributed System Behavior and Group Dynamics
… 3G) and software clients. We call this form of systems Distributed Dynamic Cooperative Environments (DDCEs). Content in DDCEs is created and shared by the users. The content could be static (e.g., video or audio), dynamic (e.g.,wikis), and/or Objects with behavior. Objects with behavior are …
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Environmental Stress Can Favor Cooperation by Triggering an Adaptive Race Between Cooperators and Cheaters
… would have been impossible if using natural cooperative systems. Surprisingly, I found that despite cooperators being less fit than cheaters, some cocultures rapidly purged cheaters, while in others cheaters dominated and drove cocultures and themselves extinct. Using deep sequencing and …
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Complexity in physical, living and mathematical systems
… in areas of different garment, such as Social systems, Ecology, Networks, Stochastic Algorithms or Mathematical sequences. It also proposes in a second place some new methods and methodologies for Complex systems analysis. Some material is based on seven published papers and two preprints under …
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Distributed spectrum leasing via cooperation
"Cognitive radio" networks enable the coexistence of primary (licensed) and secondary (unlicensed) terminals. Conventional frameworks, namely commons and property-rights models, while being promising in certain aspects, appear to have significant drawbacks for implementation of large-scale …
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Diseño de corredores de prioridad dinámicos para vehículos de emergencia basados en V2X
En ciudades con alta densidad de población, los vehículos de emergencia a menudo se encuentran con situaciones en las que el desplazamiento por la ciudad se vuelve complicado, provocando retrasos en su llegada o en el peor de los casos, no llegando a tiempo ante una situación crítica. El objetivo …