Sökning: "SRA - Informations- och kommunikationsteknik"

Visar resultat 6 - 10 av 84 avhandlingar innehållade orden SRA - Informations- och kommunikationsteknik.

1. 6. Partition Tolerance and Data Consistency in Structured Overlay Networks

   Författare :Shafaat Tallat Mahmood; Seif Haridi; Peter Van Roy; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; Structured overlay networks; distributed Hash tables; network partitions and mergers; size estimation; lookup inconsistencies; distributed key-value stores; linearizability; dynamic reconfiguration; replication.; SRA - ICT; SRA - Informations- och kommunikationsteknik;

   Sammanfattning : Structured overlay networks form a major class of peer-to-peer systems, which are used to build scalable, fault-tolerant and self-managing distributed applications. This thesis presents algorithms for structured overlay networks, on the routing and data level, in the presence of network and node dynamism. LÄS MER

3. 7. Mobile Phone-based Vehicle Positioning and Tracking and Its Application in Urban Traffic State Estimation

   Författare :Sha Tao; Ana Rusu; Elnaggar Mohammed Ismail; Saul Rodriguez; Wilco Burghout; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; SRA - ICT; SRA - Informations- och kommunikationsteknik; SRA - Transport; SRA - Transport;

   Sammanfattning : Enabling the positioning and tracking of mobile phones has emerged as a key facility of existing and future generation mobile communication systems. This feature provides opportunities for many value added location-based services and systems. LÄS MER

4. 8. Digital Dispersion Equalization and Carrier Phase Estimation in 112-Gbit/s Coherent Optical Fiber Transmission System

   Författare :Tianhua Xu; Sergei Popov; Gunnar Jacobsen; Jie Li; Magnus Karlsson; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Coherent transmission; chromatic dispersion; carrier phase estimation; digital signal processing; Optics; Optik; Photonics; Fotonik; SRA - ICT; SRA - Informations- och kommunikationsteknik;

   Sammanfattning : Coherent detection employing multilevel modulation format has become one of the most promising technologies for next generation high speed transmission system due to the high power and spectral efficiencies. With the powerful digital signal processing (DSP), coherent optical receivers allow the significant equalization of chromatic dispersion (CD), polarization mode dispersion (PMD), phase noise (PN) and nonlinear effects in the electrical domain. LÄS MER

5. 9. Fabrication and Characterization of 3C- and4H-SiC MOSFETs

   Författare :Romain Esteve; Carl-Mikael Zetterling; Tsunenobu Kimoto; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; SiC; MOSFETs; Fabrication; Characterization; Electrical engineering; electronics and photonics; Elektroteknik; elektronik och fotonik; SRA - ICT; SRA - Informations- och kommunikationsteknik;

   Sammanfattning : During the last decades, a global effort has been started towards the implementation of energy efficient electronics. Silicon carbide (SiC), a wide band-gap semiconductor is one of the potential candidates to replace the widespread silicon (Si) which enabled and dominates today’s world of electronics. LÄS MER

7. 10. Simulation and Characterization of Silicon Carbide Power Bipolar Junction Transistors

   Författare :Benedetto Buono; Mikael Östling; Gunnar Malm; Martin Domeij; Lothar Frey; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; silicon carbide; power device; BJT; diode; simulation; characterization; current gain; on-resistance; breakdown voltage; forward voltage drop; degradation; SRA - ICT; SRA - Informations- och kommunikationsteknik;

   Sammanfattning : The superior characteristics of silicon carbide, compared with silicon, have suggested considering this material for the next generation of power semiconductor devices. Among the different power switches, the bipolar junction transistor (BJT) can provide a very low forward voltage drop, a high current capability and a fast switching speed. LÄS MER