Javascript verkar inte påslaget? - Vissa delar av Lunds universitets webbplats fungerar inte optimalt utan javascript, kontrollera din webbläsares inställningar.
Du är här

Systematic feed-forward convolutional encoders are better than other encoders with an M-algorithm decoder

Publiceringsår: 1998
Språk: Engelska
Sidor: 831-838
Publikation/Tidskrift/Serie: IEEE Transactions on Information Theory
Volym: 44
Dokumenttyp: Artikel i tidskrift
Förlag: IEEE--Institute of Electrical and Electronics Engineers Inc.


Consider nonbacktracking convolutional decoders that keep a fixed number of trellis survivors. It is shown that the error performance of these depends on the early part of the distance profile and on the number of survivors kept, and not on the free distance or the details of the code generators. Particularly, the encoder may be feedforward systematic without loss. Furthermore, this kind of encoder solves the correct path loss problem in reduced-search decoders. Other kinds do not. Therefore, with almost any other decoding method than the Viterbi algorithm, systematic feed-forward encoders should be used. The conclusions in this correspondence run counter to much accepted wisdom about convolutional codes


  • Electrical Engineering, Electronic Engineering, Information Engineering


  • 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