Spatially Coupled Turbo Codes: Principles and Finite Length Performance
Paper i proceeding, 2014

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.

Författare

Alexandre Graell i Amat

Signaler och system, Kommunikationssystem, informationsteori och antenner, Kommunikationssystem

Saeedeh Moloudi

Lunds universitet

Michael Lentmaier

Lunds universitet

11th International Symposium on Wireless Communications Systems, ISWCS 2014; Barcelona; Spain; 26 August 2014 through 29 August 2014

883-887 6933478

Styrkeområden

Informations- och kommunikationsteknik

Ämneskategorier

Elektroteknik och elektronik

DOI

10.1109/ISWCS.2014.6933478

ISBN

978-147995863-4