Braided Convolutional Codes: A Class of Spatially Coupled Turbo-Like Codes
Paper in proceeding, 2014
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.
Author
Michael Lentmaier
Lunds Universitet
Saeedeh Moloudi
Lunds Universitet
Alexandre Graell i Amat
Chalmers, Signals and Systems, Kommunikationssystem, informationsteori och antenner
International Conference on Signal Processing and Communications (SPCOM). Invited Paper. Bangalore, India, 22-25 July 2014
Art. no. 6983939- 6983939
978-147994665-5 (ISBN)
Areas of Advance
Information and Communication Technology
Subject Categories (SSIF 2011)
Electrical Engineering, Electronic Engineering, Information Engineering
DOI
10.1109/SPCOM.2014.6983939
ISBN
978-147994665-5