Sökning: "Telekommunikation"

Visar resultat 1 - 5 av 301 avhandlingar innehållade ordet Telekommunikation.

  1. 1. Modeling Analog to Digital Converters at Radio Frequency

    Författare :Niclas Björsell; Peter Händel; Niclas Keskitalo; Linus Michaeli; KTH; []
    Nyckelord :ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ADC; Analog to Digital Converters; Signal processing; Telecommunication; Telekommunikation; Electronics; Elektronik;

    Sammanfattning : Det här arbetet handlar om att ta fram beteendemodeller av analog till digital omvandlare avsedda för tillämpningar i radiofrekvensområdet. Det gäller tillämpningar inom telekommunikation men även in test- och mätinstrument där omvandlingen från analoga till digitala signaler ofta är en prestandamässig flaskhals. LÄS MER

  2. 2. A Middleware for Self-Managing Large-Scale Systems

    Författare :Constantin Adam; Rolf Stadler; Arun Iyengar; KTH; []
    Nyckelord :ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; autonomic computing; self-organization; decentralized control; web services; quality of service; Telecommunication; Telekommunikation;

    Sammanfattning : This thesis investigates designs that enable individual components of a distributed system to work together and coordinate their actions towards a common goal. While the basic motivation for our research is to develop engineering principles for large-scale autonomous systems, we address the problem in the context of resource management in server clusters that provide web services. LÄS MER

  3. 3. Scalable Self-Organizing Server Clusters with Quality of Service Objectives

    Författare :Constantin Adam; Rolf Stadler; Giovanni Pacifici; KTH; []
    Nyckelord :ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Telekommunikation; Autonomic computing; self-organization; decentralized control; web services; quality of service; Telekommunikation; Telecommunication; Telekommunikation;

    Sammanfattning : Advanced architectures for cluster-based services that have been recently proposed allow for service differentiation, server overload control and high utilization of resources. These systems, however, rely on centralized functions, which limit their ability to scale and to tolerate faults. LÄS MER

  4. 4. Link Reliability in Cooperative Relaying Using Network Coding

    Författare :Tafzeel ur Rehman Ahsin; Slimane Ben Slimane; Ove Edfors; KTH; []
    Nyckelord :ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Cooperative Communications; Network Coding; Multiple Access Relay Channel; Telecommunication; Telekommunikation; SRA - ICT; SRA - Informations- och kommunikationsteknik;

    Sammanfattning : Demand for high data rates is increasing rapidly for future wireless systems.This trend is due to the increase in the number of mobile subscribers that need bandwidth hungry multimedia applications anywhere, anytime. Fourth generation cellular systems like IMT-advanced are being developed to meet these requirements. LÄS MER

  5. 5. Coding for the Wiretap Channel

    Författare :Mattias Andersson; Mikael Skoglund; Michael Lentmaier; KTH; []
    Nyckelord :ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Telecommunication; Telekommunikation;

    Sammanfattning : We consider code design for Wyner’s wiretap channel. Optimal coding schemes for this channel require an overall code that is capacity achieving for the main channel, partitioned into smaller subcodes, all of which are capacity achieving for the wiretapper’s channel. LÄS MER