An Optimized Resource Efficient Approximation of max∗ Operator for Recalculation in Turbo Code Decoder

Ming Zhan, Jun Wu, Hong Wen

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

A family of powerful and resource efficient Turbo codes is developed for sensor networks. In the hardware realization of Turbo code decoder, recalculation of the forward or backward state metrics is an effective method to reduce the size of state metrics cache. To facilitate recalculation of the state metrics, an optimized max∗ operator is presented in this paper. Calculation of the proposed max∗ operator includes two correction terms, and each one is approximated by using simple comparing, shifting and addition operations. Moreover, approximation of the proposed max∗ operator is specially optimized for reverse calculation. Although there is small error in the reverse calculation, it has been shown that the maximum error is about three percent, and the proposed approximation is validity for reverse calculation.

Original languageEnglish
Title of host publicationProceedings - 2017 5th International Conference on Enterprise Systems
Subtitle of host publicationIndustrial Digitalization by Enterprise Systems, ES 2017
EditorsZhibo Pang, Lefei Li, Gang Li
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages168-172
Number of pages5
ISBN (Electronic)9781538609361
DOIs
Publication statusPublished - 2017 Nov 22
Externally publishedYes
Event5th International Conference on Enterprise Systems, ES 2017 - Beijing, China
Duration: 2017 Sep 222017 Sep 24

Publication series

NameProceedings - 2017 5th International Conference on Enterprise Systems: Industrial Digitalization by Enterprise Systems, ES 2017

Conference

Conference5th International Conference on Enterprise Systems, ES 2017
Country/TerritoryChina
CityBeijing
Period17/9/2217/9/24

Keywords

  • approximation
  • MAP algorithm
  • max operator
  • recalculation
  • Turbo code

ASJC Scopus subject areas

  • Human-Computer Interaction
  • Management Science and Operations Research
  • Control and Optimization
  • Instrumentation
  • Management Information Systems
  • Information Systems

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