Search for dissertations about: "Distributed codes"

Showing result 1 - 5 of 26 swedish dissertations containing the words Distributed codes.

  2. 1. Structured LDPC convolutional codes

    Author : Zhongwei Si; Mikael Skoglund; Ragnar Thobaben; Michael Lentmaier; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; SRA - ICT; SRA - Informations- och kommunikationsteknik;

    Abstract : LDPC convolutional codes, also known as spatially coupled LDPC codes, have attracted considerable attention due to their promising properties. By coupling the protographs from different positions into a chain and terminating the chain properly, the resulting convolutional-like LDPC code ensemble is able to produce capacity-achieving performance in the limit of large parameters. READ MORE

  4. 2. Codes for digital fingerprinting

    Author : Jacob Löfvenberg; James Massey; Linköpings universitet; []
    Keywords : ;

    Abstract : Illegal, copying of data is a problem in many areas. Despite various efforts in copy protection and copyright enforcement the problem still exists, and with the growing use of digital means of storing and distributing data the problem seems to be getting worse. READ MORE

  5. 3. Coding, Computing, and Communication in Distributed Storage Systems

    Author : Majid Gerami; Ming Xiao; Camilla Hollanti; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Coding; Distributed Systems; Electrical Engineering; Elektro- och systemteknik;

    Abstract : Conventional studies in communication networks mostly focus on securely and reliably transmitting  data from a source node (or multiple source nodes) to multiple destinations. A more general problem appears when the destination nodes are interested in obtaining  functions of the data available in distributed source nodes. READ MORE

  6. 4. Analysis and Design of Rateless Codes

    Author : Iqbal Hussain; Lars Kildehøj Rasmussen; Petar Popovski; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Electrical Engineering; Elektro- och systemteknik;

    Abstract : The invention of turbo codes and the re-discovery of sparse graph codes constitute a milestone in error-correction codes designed for communication and storage systems. Sparse graph codes such as low-density parity-check codes can offer a performance that approaches the previously elusive Shannon capacity with reasonable practical computational complexity. READ MORE

  7. 5. On distributed coding for relay channels

    Author : Zhongwei Si; Mikael Skoglund; Ragnar Thobaben; Alexandre Graell i Amat; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Telecommunication; Telekommunikation;

    Abstract : Cooperative transmission is considered to be a key-technique for increasing the robustness, the efficiency, or the coverage of wireless communication networks. The basic concept is that the information transmission from a sender to a receiver can be aided by one or several relay nodes in a cooperative manner under constraints on power, complexity or delay. READ MORE