Threshold Computation for Spatially Coupled Turbo-Like Codes on the AWGN Channel
Artikel i vetenskaplig tidskrift, 2021

In this paper, we perform a belief propagation (BP) decoding threshold analysis of spatially coupled (SC) turbo-like codes (TCs) (SC-TCs) on the additive white Gaussian noise (AWGN) channel. We review Monte-Carlo density evolution (MC-DE) and efficient prediction methods, which determine the BP thresholds of SC-TCs over the AWGN channel. We demonstrate that instead of performing time-consuming MC-DE computations, the BP threshold of SC-TCs over the AWGN channel can be predicted very efficiently from their binary erasure channel (BEC) thresholds. From threshold results, we conjecture that the similarity of MC-DE and predicted thresholds is related to the threshold saturation capability as well as capacity-approaching maximum a posteriori (MAP) performance of an SC-TC ensemble.

spatially coupled codes

density evolution

concatenated convolutional codes

iterative decoding

turbo codes

AWGN channel

coding thresholds

Författare

Muhammad Umar Farooq

Lunds universitet

Alexandre Graell I Amat

Chalmers, Elektroteknik, Kommunikations- och antennsystem, Kommunikationssystem

Michael Lentmaier

Lunds universitet

Entropy

1099-4300 (ISSN)

Vol. 23 2 240

Ämneskategorier

Datorteknik

Telekommunikation

Signalbehandling

DOI

10.3390/e23020240

PubMed

33669649

Mer information

Senast uppdaterat

2021-03-23