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On the Decoding Performance of Spatially Coupled LDPC Codes With Sub-Block Access.
- Source :
- IEEE Transactions on Information Theory; Jun2022, Vol. 68 Issue 6, p3700-3718, 19p
- Publication Year :
- 2022
-
Abstract
- We study spatially coupled LDPC codes that allow access to sub-blocks much smaller than the full code block. Sub-block access is realized by a semi-global decoder that decodes a chosen target sub-block by only accessing the target, plus a prescribed number of helper sub-blocks adjacent in the code chain. This paper develops a theoretical methodology for analyzing the semi-global decoding performance of spatially coupled LDPC codes constructed from protographs. The main result shows that semi-global decoding thresholds can be derived from certain thresholds we define for the single-sub-block graph. These characterizing thresholds are also used for deriving lower bounds on the decoder’s performance over channels with variability across sub-blocks, which are motivated by applications in data storage. [ABSTRACT FROM AUTHOR]
- Subjects :
- LOW density parity check codes
BLOCK codes
DATA warehousing
MARKOV processes
Subjects
Details
- Language :
- English
- ISSN :
- 00189448
- Volume :
- 68
- Issue :
- 6
- Database :
- Complementary Index
- Journal :
- IEEE Transactions on Information Theory
- Publication Type :
- Academic Journal
- Accession number :
- 157007237
- Full Text :
- https://doi.org/10.1109/TIT.2022.3152104