Sökning: "spectrum sharing constraints"

Visar resultat 1 - 5 av 13 avhandlingar innehållade orden spectrum sharing constraints.

1. 1. Performance Analysis of Cognitive Radio Networks under Spectrum Sharing and Security Constraints

   Författare :Louis Sibomana; Zepernick Hans-Jürgen; Slimane Ben Slimane; Blekinge Tekniska Högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Underlay cognitive radio networks; spectrum sharing constraints; physical layer security;

   Sammanfattning : The cognitive radio network (CRN) concept has been proposed as a solution to the growing demand and underutilization of the radio spectrum. To improve the radio spectrum utilization, CRN technology allows the coexistence of licensed and unlicensed systems over the same spectrum. LÄS MER

3. 2. Understanding information sharing in supply chains - Identifying contingency factors that impact benefits of information sharing

   Författare :Joakim Kembro; Teknisk logistik; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Logistics; Supply chain; Supply chain management; Information sharing; Information flow; Demand data; Contingency theory; Contextual factor;

   Sammanfattning : To increase our understanding of information sharing in supply chains the purposeof this licentiate was threefold: to review and analyze existing academic literature to describe and structure the research field; to empirically explore information sharing in a supply chain representing more than three tiers; and to explore contingency factors through literature reviews and empirical data collection. Thereby this licentiate thesis addresses several gaps identified in academic literature. LÄS MER

4. 3. On the Performance of Underlay Cognitive Radio Networks with Interference Constraints and Relaying

   Författare :Charles Kabiri; Blekinge Tekniska Högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Cognitive Radio Networks; Cognitive Cooperative Relay Networks; Underlay Spectrum Access; Interference Constraint; Outage Constraint;

   Sammanfattning : Efficiently allocating the scarce and expensive radio resources is a key challenge for advanced radio communication systems. To this end, cognitive radio (CR) has emerged as a promising solution which can offer considerable improvements in spectrum utilization. LÄS MER

5. 4. Decentralized Resource Sharing and Associationin in Wireless Networks

   Författare :Yuzhe Xu; Carlo Fischione; Sinem Coleri Ergen; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

   Sammanfattning : In wireless networks, some of the most important supporting functionalities are decentralized resource sharing and association of clients to access points. These functionalities aim to optimally allocate the available wireless transmission resources, for example, time or spectrum channels, the transmit power, access points, and relaying opportunities, all of which are subject to availability constraints. LÄS MER

7. 5. On the Performance Analysis of Cooperative Communications with Practical Constraints

   Författare :Quang Trung Duong; Blekinge Tekniska Högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

   Sammanfattning : With the rapid development of multimedia services, wireless communication engineers may face a major challenge to meet the demand of higher data-rate communication over error-prone mobile radio channels. As a promising solution, the concept of cooperative communication, where a so-called relay node is formed to assist the direct link, has recently been applied to alleviate the severe pathloss and shadowing effects in wireless systems. LÄS MER