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Braided Convolutional Codes: A Class of Spatially Coupled Turbo-Like Codes

Michael Lentmaier ; Saeedeh Moloudi ; Alexandre Graell i Amat (Institutionen för signaler och system, Kommunikationssystem)
International Conference on Signal Processing and Communications (SPCOM). Invited Paper. Bangalore, India, 22-25 July 2014 p. Art. no. 6983939. (2014)
[Konferensbidrag, refereegranskat]

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.



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Denna post skapades 2014-07-31. Senast ändrad 2016-06-30.
CPL Pubid: 200795

 

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