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Boosting the error performance of suboptimal tailbiting decoders

Författare:
Publiceringsår: 2003
Språk: Engelska
Sidor: 1485-1491
Publikation/Tidskrift/Serie: IEEE Transactions on Communications
Volym: 51
Nummer: 9
Dokumenttyp: Artikel
Förlag: IEEE

Sammanfattning

Tailbiting is an attractive method to terminate convolutional codes without reducing the code rate. Maximum-likelihood and exact a posteriori probability decoding of tailbiting codes implies, however, a large computational complexity. Therefore, suboptimal decoding methods are often used in practical coding schemes. It is shown that suboptimal decoding methods work better when the slope of the active distances of the generating convolutional encoder is large. Moreover, it is shown that considering quasi-cyclic shifts of the received channel output can increase the performance of suboptimal tailbiting decoders. The findings are most relevant to tailbiting codes where the number of states is not small relative to the block length.

Disputation

Nyckelord

  • Technology and Engineering
  • active distance
  • suboptimal decoding
  • tailbiting code

Övriga

Published
Yes
  • ISSN: 0090-6778

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