publication . Conference object . 1999

Turbo codes: correlated extrinsic information and its impact on iterative decoding performance

Hokfelt, Johan; Ove Edfors; Maseng, Torleiv;
  • Published: 01 Jan 1999
  • Country: Sweden
Abstract
The performance of a turbo code is dependent on two properties of the code: its distance spectrum and its suitability to be iteratively decoded. The performance of iterative decoding depends on the quality of the extrinsic inputs; badly correlated extrinsic inputs can deteriorate the performance. While most turbo coding literature assumes that the extrinsic information is uncorrelated, we investigate these correlation properties. An iterative decoding suitability measure is presented, intended to serve as an indication on the degree of correlation between extrinsic inputs. The suitability measure can be used as a complement to the weight distribution when rankin...
Subjects
arXiv: Computer Science::Information Theory
ACM Computing Classification System: Data_CODINGANDINFORMATIONTHEORY
free text keywords: Electrical Engineering, Electronic Engineering, Information Engineering, Algorithm, Serial concatenated convolutional codes, Electronic engineering, Concatenated error correction code, Linear code, Turbo equalizer, Theoretical computer science, List decoding, Sequential decoding, Decoding methods, Computer science, Turbo code
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