Sökning: "Error-Correcting Codes"

Visar resultat 1 - 5 av 31 avhandlingar innehållade orden Error-Correcting Codes.

  1. 1. Topics in applied mathematics -- error-correcting codes and homogenization of PDE

    Författare :Erik Alapää; Göteborgs universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; homogenization of partial differential equations; error-correcting codes; channel coding; convolutional codes; streaming media; MPEG4; wireless IP; discrete Markov processes; MPEG4;

    Sammanfattning : .... LÄS MER

  3. 2. Optimization, Matroids and Error-Correcting Codes

    Författare :Martin Hessler; Johan Wästlund; Olof Heden; Faina I. Solov´eva; Linköpings universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; MATHEMATICS; MATEMATIK;

    Sammanfattning : The first subject we investigate in this thesis deals with optimization problems on graphs. The edges are given costs defined by the values of independent exponential random variables. We show how to calculate some or all moments of the distributions of the costs of some optimization problems on graphs. LÄS MER

  4. 3. Error-Correcting Codes Based on Chaotic Dynamical Systems

    Författare :Håkan Andersson; Thomas Mittelholzer; Linköpings universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : This dissertation treats a novel class of error-correcting codes based on chaotic dynamical systems. The codes are defined over a continuous alphabet whereas the information that is to be transmitted belongs to a discrete set of symbols. Simple expressions can be given for the encoders, and the codewords can be described by a parity-check relation. LÄS MER

  5. 4. Capabilities of Convolutional Codes: Unequal Error Protection and More

    Författare :Victor Pavlushkov; Institutionen för elektro- och informationsteknik; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Elektronik och elektroteknik; Electronics and Electrical technology; systemteori; Informatik; Informatics; systems theory; woven codes; unequal error protection; active input-distance; active output-distance; maximum slope; active distances; Convolutional codes; error-correcting capability;

    Sammanfattning : Many communication systems obtain enhanced performance by using concatenated coding schemes. Turbo codes and woven convolutional codes are two examples of such schemes. LÄS MER

  7. 5. Analysis and Design of Spatially-Coupled Codes with Application to Fiber-Optical Communications

    Författare :Christian Häger; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; bit mapper; generalized product codes; generalized low-density parity-check codes; bounded-distance decoding; density evolution; spatial coupling; staircase codes.; braided codes; Bit-interleaved coded modulation;

    Sammanfattning : The theme of this thesis is the analysis and design of error-correcting codes that are suitable for high-speed fiber-optical communication systems. In particular, we consider two code classes. The codes in the first class are protograph-based low-density parity-check (LDPC) codes which are decoded using iterative soft-decision decoding. LÄS MER