On the Universality of Spatially Coupled LDPC Codes Over Intersymbol Interference Channels
Paper i proceeding, 2021

In this paper, we derive the exact input/output transfer functions of the optimal a-posteriori probability channel detector for a general ISI channel with erasures. Considering three channel impulse responses of different memory as an example, we compute the BP and MAP thresholds for regular spatially coupled LDPC codes with joint iterative detection and decoding. When we compare the results with the thresholds of ISI channels with Gaussian noise we observe an apparent inconsistency, i.e., a channel which performs better with erasures performs worse with AWGN. We show that this anomaly can be resolved by looking at the thresholds from an entropy perspective. We finally show that with spatial coupling we can achieve the symmetric information rates of different ISI channels using the same code.

Författare

Mgeni Makambi Mashauri

Lunds universitet

Alexandre Graell I Amat

Chalmers, Elektroteknik, Kommunikation, Antenner och Optiska Nätverk, Kommunikationssystem

Michael Lentmaier

Lunds universitet

2021 IEEE Information Theory Workshop, ITW 2021


978-1-6654-0312-2 (ISBN)

2021 IEEE Information Theory Workshop (ITW)
Kanazawa, Japan,

Förbättra iterativa mottagare med spatialt koppling

Vetenskapsrådet (VR) (2017-04370), 2018-01-01 -- 2021-12-31.

Styrkeområden

Informations- och kommunikationsteknik

Ämneskategorier

Telekommunikation

Kommunikationssystem

Signalbehandling

DOI

10.1109/ITW48936.2021.9611454

ISBN

9781665403122

Mer information

Senast uppdaterat

2022-02-03