Construction of irregular protograph-based QC-LDPC codes with low error floor

B Karimi, AH Banihashemi - IEEE Transactions on …, 2020 - ieeexplore.ieee.org
In this article, we design finite-length irregular protograph-based quasi-cyclic (QC) low-
density parity-check (LDPC) codes with good waterfall performance and low error floor. To …

Construction of time invariant spatially coupled LDPC codes free of small trapping sets

S Naseri, AH Banihashemi - IEEE Transactions on …, 2021 - ieeexplore.ieee.org
In this paper, we propose a design technique for the construction of variable-regular time-
invariant spatially-coupled low-density parity-check (SC-LDPC) codes with small constraint …

Construction of QC LDPC codes with low error floor by efficient systematic search and elimination of trapping sets

B Karimi, AH Banihashemi - IEEE Transactions on …, 2019 - ieeexplore.ieee.org
We propose a systematic design of protograph-based quasi-cyclic (QC) low-density parity-
check (LDPC) codes with low error floor. We first characterize the trapping sets of such …

A combinatorial methodology for optimizing non-binary graph-based codes: Theoretical analysis and applications in data storage

A Hareedy, C Lanka, N Guo… - IEEE Transactions on …, 2018 - ieeexplore.ieee.org
Non-binary (NB) low-density parity-check (LDPC) codes are graph-based codes that are
increasingly being considered as a powerful error correction tool for modern dense storage …

Error floor estimation of LDPC decoders—A code independent approach to measuring the harmfulness of trapping sets

A Farsiabi, AH Banihashemi - IEEE Transactions on …, 2020 - ieeexplore.ieee.org
The linear state-space model is a well-known code-independent method to estimate the
contribution of a trapping set (TS) structure to the error floor of low-density parity-check …

Performance bounds and estimates for quantized LDPC decoders

H Hatami, DGM Mitchell, DJ Costello… - IEEE Transactions on …, 2019 - ieeexplore.ieee.org
The performance of low-density parity-check (LDPC) codes at high signal-to-noise ratios
(SNRs) is known to be limited by the presence of certain sub-graphs that exist in the Tanner …

Error floor analysis of LDPC row layered decoders

A Farsiabi, AH Banihashemi - IEEE Transactions on …, 2021 - ieeexplore.ieee.org
In this paper, we analyze the error floor of quasi-cyclic (QC) low-density parity-check (LDPC)
codes decoded by the sum-product algorithm (SPA) with row layered message-passing …

A Unified, SNR-Aware SC-LDPC Code Design With Applications to Magnetic Recording

H Esfahanizadeh, E Ram, Y Cassuto… - IEEE Transactions on …, 2022 - ieeexplore.ieee.org
Spatially coupled (SC)-low-density parity-check (LDPC) codes are known to have
outstanding error-correction performance and low decoding latency, which make them an …

Error floor estimation of LDPC coded modulation systems using importance sampling

P Neshaastegaran, AH Banihashemi… - IEEE Transactions on …, 2021 - ieeexplore.ieee.org
One of the key weaknesses of low-density parity-check (LDPC) codes is the error floor that
they typically exhibit at high signal-to-noise ratios (SNRs). Such an error floor is usually …

Asymptotic average multiplicity of structures within different categories of trapping sets, absorbing sets, and stopping sets in random regular and irregular LDPC code …

A Dehghan, AH Banihashemi - IEEE Transactions on …, 2019 - ieeexplore.ieee.org
The performance of low-density parity-check (LDPC) codes in the error floor region is closely
related to some substructures of the code's Tanner graph, collectively referred to as trapping …