Search for dissertations about: "Hadamard"

Showing result 1 - 5 of 13 swedish dissertations containing the word Hadamard.

  2. 1. On Soft Decoding and Robust Vector Quantization

    Author : Mikael Skoglund; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; speech and image coding; intersymbol interference; Rayleigh fading; soft decoding; CDMA; index assignment; Hadamard transform; channel optimized VQ; robust VQ; combined source-channel coding; vector quantization VQ ; noisy channels;

    Abstract : This thesis considers vector quantization for noisy channels. Vector quantization (VQ) is an important technique for block-based source coding, with applications in, e.g., speech and image coding. READ MORE

  4. 2. Analysis of Dispersion Effects in Unreplicated Factorial Designs

    Author : Kerstin Wiklander; Göteborgs universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; dispersion effects; location effects; two-level factorial experiment; fractional designs; Hadamard products; fractional designs;

    Abstract : Methods for estimating and testing hypotheses of dispersion effects in two-level unreplicated factorial designs are studied. Under a particular = normal model, some linear combinations of the response variables are constructed in order to make a simple inference. READ MORE

  5. 3. Exploring the Set of Quantum States

    Author : Åsa Ericsson; Ingemar Bengtsson; Christopher Fuchs; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; quantum mechanics; quantum states; density matrices; quantum information; geometry; Physics; Fysik; Theoretical Physics; teoretisk fysik;

    Abstract : Quantum mechanical properties of finite dimensional quantum systems are used within the field of quantum information. In this thesis the set of states (density matrices) for such systems is studied and described, largely in geometrical terms. READ MORE

  6. 4. Reconstruction of flow and temperature from boundary data

    Author : Tomas Johansson; Vladimir Kozlov; George Bastay (Baravdish); Jürgen Rossmann; Linköpings universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Partiella differentialekvationer; Operatorteori;

    Abstract : In this thesis, we study Cauchy problems for elliptic and parabolic equations. These include the stationary Stokes system and the heat equation. Data are given on a part of the boundary of a bounded domain. The aim is to reconstruct the solution from these data. READ MORE

  7. 5. Modulation and channel effects in digital communication

    Author : Sara Sandberg; Luleå tekniska universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Signalbehandling; Signal Processing;

    Abstract : This thesis investigates three possible methods to increase the performance of digital communication systems, with focus on wireless systems, by accounting for some of the channel effects that may occur. The modulation scheme plays an important role in the impact of different channel effects on system performance and this work considers both a single-carrier system and orthogonal frequency-division multiplexing (OFDM). READ MORE