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Spatially-Coupled Nearly-Regular LDPC Code Ensembles for Rate-Flexible Code Design

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Author

Summary, in English

Spatially coupled regular LDPC code ensembles have outstanding performance with belief propagation decoding and can perform close to the Shannon limit. In this paper we investigate the suitability of coupled regular LDPC code ensembles with respect to rate-flexibility. Regular ensembles with good performance and low complexity exist for a variety of specific code rates. On the other hand it can be observed that outside this set of favorable rational rates the complexity and performance become unreasonably high. We therefore propose ensembles with slight irregularity that allow us to smoothly cover the complete range of rational rates. Our simple construction allows a performance with negligible gap to the Shannon limit while maintaining complexity as low as for the best regular code ensembles. At the same time the construction guarantees that asymptotically the minimum distance grows linearly with the length of the coupled blocks.

Publishing year

2014

Language

English

Publication/Series

[Host publication title missing]

Document type

Conference paper

Publisher

IEEE - Institute of Electrical and Electronics Engineers Inc.

Topic

  • Electrical Engineering, Electronic Engineering, Information Engineering

Keywords

  • LDPC codes
  • spatial coupling
  • LDPC convolutional codes

Conference name

IEEE International Conference on Communications (ICC), 2014

Conference date

2014-06-10 - 2014-06-14

Conference place

Sydney, Australia

Status

Published

Research group

  • Telecommunication Theory