Meny

Javascript is not activated in your browser. This website needs javascript activated to work properly.
Du är här

Woven convolutional codes II: Decoding aspects

Författare:
Publiceringsår: 2004
Språk: Engelska
Sidor: 2522-2529
Publikation/Tidskrift/Serie: IEEE Transactions on Information Theory
Volym: 50
Nummer: 10
Dokumenttyp: Artikel
Förlag: IEEE

Sammanfattning

An iterative decoding scheme for woven convolutional codes is presented. It operates in a window sliding over the received sequence. This exploits the nature of convolutional codewords as infinite sequences and reflects the concept of considering convolutional encoding and decoding as a continuous process. The decoder is analyzed in terms of decoding delay and decoding complexity. Its basic building block is a symbol-by-symbol a posteriori probability (APP) decoder for convolutional codes, which is a windowed variant of the well-known Bahl-Cocke-Jelinek-Raviv (BCJR) algorithm. Additional interleaving for the woven constructions is introduced by employing convolutional scramblers. It is shown that row-wise random interleaving preserves the lower bound on the free distance of the original woven constructions. Based on the properties of the interleavers, new lower bounds on the free distance of woven constructions with both outer warp and inner warp are derived. Simulation results for woven convolutional codes with and without additional interleaving are presented.

Disputation

Nyckelord

  • Technology and Engineering
  • free
  • concatenated convolutional codes
  • convolutional interleaving
  • distance
  • iterative decoding
  • woven convolutional codes

Övriga

Published
Yes
  • ISSN: 0018-9448

Box 117, 221 00 LUND
Telefon 046-222 00 00 (växel)
Telefax 046-222 47 20
lu [at] lu [dot] se

Fakturaadress: Box 188, 221 00 LUND
Organisationsnummer: 202100-3211
Om webbplatsen