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Visar resultat 1 - 5 av 283 avhandlingar som matchar ovanstående sökkriterier.

  1. 1. Synchronization for Multicarrier Systems

    Författare :Daniel Landström; Institutionen för elektro- och informationsteknik; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Signal processing; Signalbehandling; Frequency estimation; Time estimation; Maximum-Likelihood; Synchronization; OFDM; DMT;

    Sammanfattning : This thesis has synchronization of Multicarrier systems, more specifically Orthogonal Frequency Division Multiplexing (OFDM) systems, as the main theme. The thesis addresses two areas, the first proposing and analyzing time and frequency estimators for OFDM systems, the second investigating more practical issues around these estimators. LÄS MER

  3. 2. Synchronization in Turbo Coded Systems

    Författare :Bartosz Mielczarek; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; timing offset; Turbo codes; synchronization; maximum a-posteriori estimation; phase offset; BCJR algorithm.; maximum likelihood estimation;

    Sammanfattning : Turbo codes and their unusual properties have attracted significant attentionof the information theory community. There already exist many articlesand papers devoted to the theory of these codes. This thesis, however,focuses on practical implementation issues of turbo codes, with synchronizationproblems as the main topic. LÄS MER

  4. 3. On synchronization of CDMA systems

    Författare :Fredrik Malmsten; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; code-spread CDMA CS-CDMA ; maximum-likelihood; channel parameter estimation; multipath; synchronization; near-far resistance; direct-sequence code-division multiple-access DS-CDMA ;

    Sammanfattning : .... LÄS MER

  5. 4. On synchronization of heavy truck transmissions

    Författare :Daniel Häggström; Ulf Sellgren; Stefan Björklund; Anders Hedman; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; synchronization; synchronizers; gear shift; gearbox; synkronisering; växling; växellåda; Machine Design; Maskinkonstruktion;

    Sammanfattning : Gear shifts are becoming more and more important as engines are adapted to low speed high torque working conditions. Synchronizers are key components for successful gear shifts. To adapt the synchronizers to new working conditions due to adaptations to new engines, improved development tools are needed. LÄS MER

  7. 5. Synchronization and consistency in concurrent systems

    Författare :Anders Gidenstam; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; event ordering; lock-free; memory management; time-stamping system; plausible clocks; non-blocking; logical clocks; synchronization;

    Sammanfattning : This thesis investigates aspects of synchronization and coordination in concurrent systems. In such systems synchronization and coordination are highly important as they form a basis for how a set of entities can collaborate to solve a task. LÄS MER