Search for dissertations about: "large-system analysis"

Showing result 1 - 5 of 6 swedish dissertations containing the words large-system analysis.

  2. 1. A Statistical-Physics Approach to the Analysisof Wireless Communication Systems

    Author : Maksym Girnyk; Lars K. Rasmussen; Giuseppe Caire; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; wireless communications; statistical physics; random matrix theory; large-system analysis; MIMO; 5G; Electrical Engineering; Elektro- och systemteknik;

    Abstract : Multiple antennas at each side of the communication channel seem to be vital for future wireless communication systems. Multi-antenna communication provides throughput gains roughly proportional to the smallest number of antennas at the communicating terminals. READ MORE

  4. 2. Simplified Graphical Approaches for CDMA Multi-User Detection, Decoding and Power Control

    Author : Peng Hui Tan; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; code-division multiple access; belief propagation; large system analysis; iterative decoding; multiuser detection; power control;

    Abstract : The individual optimal detector for code-division multiple-access (CDMA) systems is based on the marginal a posteriori distribution of the transmitted bits. The marginalization is in general hard since a summation is required, which grows exponentially in scope with the number of active users. READ MORE

  5. 3. Live help systems : an approach to intelligent help for Web information systems

    Author : Johan Åberg; Linköpings universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Computer science; Datavetenskap;

    Abstract : Since the creation of the World-Wide Web we have seen a great growth in the complexity of Web sites. There has also been a large expansion in number of Web sites and in amount of usage. As a consequence, more and more Web site users are having problems accomplishing their tasks, and it is increasingly important to provide them with support. READ MORE

  6. 4. Multiscale Simulation Methods for Thermoelectric Generators

    Author : Olle Högblom; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Exhaust gas heat recovery; subgrid modelling; CFD; Thermoelectrics; Contact resistances;

    Abstract : Rising energy prices and greater environmental awareness, along with stringent emissions legislation, in the automotive industry make it possible to introduce techniques in the aftertreatment system that have previously been unprofitable. One such technique, studied here, is heat recovery from exhaust gases using thermoelectric generators. READ MORE

  7. 5. Interacting particle systems for opinion dynamics: the Deffuant model and some generalizations

    Author : Timo Hirscher; Göteborgs universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Deffuant model; bounded confidence; opinion dynamics; sociophysics; consensus formation; general opinion space; percolation; pumpless water transport.; opinion dynamics;

    Abstract : In the field of sociophysics, concepts and techniques taken from statistical physics are used to model and investigate some social and political behavior of a large group of humans: their social network is given by a simple graph and neighboring individuals meet and interact in pairs or small groups. Although most of the established models feature rather simple microscopic interaction rules, the macroscopic long-time behavior of the collective often eludes an analytical treatment due to the complexity, which stems from the interaction of the large system as a whole. READ MORE