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A simplified computational kernel for trellis-based decoding

Publiceringsår: 2004
Språk: Engelska
Sidor: 156-158
Publikation/Tidskrift/Serie: IEEE Communications Letters
Volym: 8
Nummer: 3
Dokumenttyp: Artikel i tidskrift
Förlag: IEEE--Institute of Electrical and Electronics Engineers Inc.


A simplified branch metric and add-compare-select (ACS) unit is presented for use in trellis-based decoding architectures. The simplification is based on a complementary property of best feedforward and some systematic feedback encoders. As a result, one adder is saved in every other ACS unit. Furthermore, only half the branch metrics have to be calculated. It is shown that this simplification becomes especially beneficial for rate 1/2 convolutional codes. Consequently, area and power consumption will be reduced in a hardware implementation.


  • Electrical Engineering, Electronic Engineering, Information Engineering
  • very large-scale
  • Viterbi decoding
  • integration (VLSI)
  • logMAP
  • branch metric
  • add-compare-select (ACS)


  • Digital ASIC: Flexible Coding and Decoding for Wireless Personal Area Networks
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  • Informations- och kommunikationsteori-lup-obsolete
  • ISSN: 1089-7798

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