Iterative decoding algorithm and terminating criteria for inter-block permuted turbo codes

Yan X. Zheng*, Yu-Ted Su

*Corresponding author for this work

Research output: Contribution to conferencePaperpeer-review

2 Scopus citations

Abstract

Inter-block permutation (IBP) concept is a simple but effective technique to improve the performance of a conventional turbo code. On the other hand, proper early termination leads to reduced decoding latency without compromising the performance. For inter-block permuted turbo codes (IBP-TC), however, the termination time variation over blocks within the interleaving span necessitates a new design paradigm. We use both cyclic redundancy check (CRC) code and sign check to make a termination decision and generate soft information for unterminated neighboring blocks at the same time. The new decoder that combines the features of iterative decoding and variable stopping time not only yields less average decoding delay but also outperforms its fixed-stopping-time counterpart by 0.2 - 0.3 dB.

Original languageEnglish
Pages1116-1120
Number of pages5
StatePublished - 1 Dec 2004
Event2004 IEEE 15th International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC 2004 - Barcelona, Spain
Duration: 5 Sep 20048 Sep 2004

Conference

Conference2004 IEEE 15th International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC 2004
CountrySpain
CityBarcelona
Period5/09/048/09/04

Keywords

  • CRC
  • IBPTC
  • Interleaver
  • Sign check
  • Stopping criteria
  • Turbo codes

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