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Spatially Coupled Turbo Codes: Principles and Finite Length Performance

Alexandre Graell i Amat (Institutionen för signaler och system, Kommunikationssystem) ; Saeedeh Moloudi ; Michael Lentmaier
11th International Symposium on Wireless Communications Systems, ISWCS 2014; Barcelona; Spain; 26 August 2014 through 29 August 2014 p. 883-887. (2014)
[Konferensbidrag, refereegranskat]

In this paper, we give an overview of spatially coupled turbo codes (SC-TCs), the spatial coupling of parallel and serially concatenated convolutional codes, recently introduced by the authors. For presentation purposes, we focus on spatially coupled serially concatenated codes (SC-SCCs). We review the main principles of SC-TCs and discuss their exact density evolution (DE) analysis on the binary erasure channel. We also consider the construction of a family of rate-compatible SC-SCCs with simple 4-state component encoders. For all considered code rates, threshold saturation of the belief propagation (BP) to the maximum a posteriori threshold of the uncoupled ensemble is demonstrated, and it is shown that the BP threshold approaches the Shannon limit as the coupling memory increases. Finally we give some simulation results for finite lengths.

Article number 6933478.

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Denna post skapades 2014-07-31. Senast ändrad 2016-06-30.
CPL Pubid: 200798


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Institutionen för signaler och system, Kommunikationssystem (1900-2017)


Informations- och kommunikationsteknik
Elektroteknik och elektronik

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