Braided Convolutional Codes - A Class of Spatially Coupled Turbo-Like Codes

Michael Lentmaier, Saeedeh Moloudi, Alexandre Graell i Amat

Research output: Chapter in Book/Report/Conference proceedingPaper in conference proceedingpeer-review

9 Citations (SciVal)
230 Downloads (Pure)

Abstract

In this paper, we investigate the impact of spatial coupling on the thresholds of turbo-like codes. Parallel concatenated and serially concatenated convolutional codes as well as braided convolutional codes (BCCs) are compared by means of an exact density evolution (DE) analysis for the binary erasure channel (BEC). We propose two extensions of the original BCC ensemble to improve its threshold and demonstrate that their BP thresholds approach the maximum-a posteriori (MAP) threshold of the uncoupled ensemble. A comparison of the different ensembles shows that parallel concatenated ensembles can be outperformed by both serially concatenated and BCC ensembles, although they have the best BP thresholds in the uncoupled case.
Original languageEnglish
Title of host publication[Host publication title missing]
PublisherIEEE - Institute of Electrical and Electronics Engineers Inc.
Publication statusPublished - 2014
EventInternational Conference on Signal Processing and Communications (SPCOM) - Bangalore, India
Duration: 2014 Jul 222014 Jul 25

Conference

ConferenceInternational Conference on Signal Processing and Communications (SPCOM)
Country/TerritoryIndia
CityBangalore
Period2014/07/222014/07/25

Subject classification (UKÄ)

  • Electrical Engineering, Electronic Engineering, Information Engineering

Keywords

  • turbo codes
  • braided codes
  • braided convolutional codes
  • LDPC convolutional codes
  • spatial coupling

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