American Institute of Mathematical Sciences

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February  2018, 12(1): 151-168. doi: 10.3934/amc.2018010

Channel decomposition for multilevel codes over multilevel and partial erasure channels

Carolyn Mayer 1,, , Kathryn Haymaker 2, and  Christine A. Kelley 1,

1. 

Department of Mathematics, University of Nebraska-Lincoln, Lincoln, Nebraska 68588-0130, USA
2. 

Department of Mathematics & Statistics, Villanova University, Villanova, PA 19085, USA

* Corresponding author: Carolyn Mayer.

Received  October 2016 Published  March 2018

We introduce the Multilevel Erasure Channel (MEC) for binary extension field alphabets. The channel model is motivated by applications such as non-volatile multilevel read storage channels. Like the recently proposed $q$-ary partial erasure channel (QPEC), the MEC is designed to capture partial erasures. The partial erasures addressed by the MEC are determined by erasures at the bit level of the $q$-ary symbol representation. In this paper we derive the channel capacity of the MECand give a multistage decoding scheme on the MEC using binary codes. We also present a low complexity multistage $p$-ary decoding strategy for codes on the QPEC when $q = p^k$.We show that for appropriately chosen component codes, capacity on the MEC and QPEC may be achieved.

Keywords: Partial erasure channels, multilevel codes, multistage decoding, storage channels.
Mathematics Subject Classification: Primary: 94A40, 94B35; Secondary: 94A15.
Citation: Carolyn Mayer, Kathryn Haymaker, Christine A. Kelley. Channel decomposition for multilevel codes over multilevel and partial erasure channels. Advances in Mathematics of Communications, 2018, 12 (1) : 151-168. doi: 10.3934/amc.2018010
References:
[1]

K. A. S. Abdel-Ghaffar and M. Hassner, Multilevel error-control codes for data storage channels, IEEE Trans. Inf. Theory, 37 (1991), 735-741. Google Scholar

[2]

S. Borade, B. Nakiboğlu and L. Zheng, Unequal error protection: an information-theoretic perspective, IEEE Trans. Inf. Theory, 55 (2009), 5511-5539. Google Scholar

[3]

Y. Cai, E. F. Haratsch, O. Mutlu and K. Mai, Error patterns in MLC NAND flash memory: Measurement, characterization and analysis in Des. Autom. Test Europ. Conf. Exhib. (DATE), 2012.Google Scholar

[4]

A. R. Calderbank and N. Seshadri, Multilevel codes for unequal error protection, IEEE Trans. Inf. Theory, 39 (1993), 1234-1248. Google Scholar

[5]

R. Cohen and Y. Cassuto, Iterative decoding of LDPC codes over the $q$-ary partial erasure channel, IEEE Trans. Inf. Theory, 62 (2016), 2658-2672. Google Scholar

[6]

D. Declercq and M. Fossorier, Decoding algorithms for nonbinary LDPC codes over $\text{GF}(q)$, IEEE Trans. Commun., 55 (2007), 633-643. Google Scholar

[7]

R. Gabrys, E. Yaakobi and L. Dolecek, Graded bit-error-correcting codes with applications to flash memory, IEEE Trans. Inf. Theory, 59 (2013), 2315-2327. Google Scholar

[8]

R. Gabrys, E. Yaakobi, L. Grupp, S. Swanson and L. Dolecek, Tackling intracell variability in TLC flash through tensor product codes in Proc. IEEE Int. Symp. Inf. Theory, Cambridge, 2012.Google Scholar

[9]

R. G. Gallager, Low Density Parity Check Codes, MIT Press, 1963.Google Scholar

[10]

K. Haymaker and C. A. Kelley, Structured bit-interleaved LDPC codes for MLC flash memory, IEEE J. Sel. Areas Commun., 32 (2014), 870-879. Google Scholar

[11]

J. Huber, U. Wachsmann and R. Fischer, Coded modulation by multilevel-codes: Overview and state of the art in ITG-Fachberichte Conf. Rec., Aachen, 1998. Google Scholar

[12]

H. Imai and S. Hirakawa, A new multilevel coding method using error-correcting codes, IEEE Trans. Inf. Theory, 23 (1977), 371-377. Google Scholar

[13]

M. Moser and P. Chen, A Student's Guide to Coding and Information Theory, Cambridge Univ. Press, Cambridge, 2012. Google Scholar

[14]

T. Richardson, A. Shokrollahi and R. Urbanke, Design of capacity-approaching irregular low-density parity-check codes, IEEE Trans. Inf. Theory, 47 (2001), 619-637. Google Scholar

[15]

T. J. Richardson and R. L. Urbanke, The capacity of low-density parity-check codes under message passing decoding, IEEE Trans. Inf. Theory, 47 (2001), 599-618. Google Scholar

[16]

R. M. Tanner, A recursive approach to low complexity codes, IEEE Trans. Inf. Theory, 27 (1981), 533-547. Google Scholar

[17]

T. Tao and V. H. Vu, Additive Combinatorics, Cambridge Univ. Press, 2006. Google Scholar

[18]

U. Wachsmann, R. F. H. Fischer and J. B. Huber, Multilevel codes: Theoretical concepts and practical design rules, IEEE Trans. Inf. Theory, 45 (1999), 1361-1391. Google Scholar

[19]

Z. Zhang, W. Xiao, N. Park and D. J. Lilja, Memory module-level testing and error behaviors for phase change memory in IEEE 30th Int. Conf. Comp. Des. (ICCD), 2012.Google Scholar

show all references

References:
[1]

K. A. S. Abdel-Ghaffar and M. Hassner, Multilevel error-control codes for data storage channels, IEEE Trans. Inf. Theory, 37 (1991), 735-741. Google Scholar

[2]

S. Borade, B. Nakiboğlu and L. Zheng, Unequal error protection: an information-theoretic perspective, IEEE Trans. Inf. Theory, 55 (2009), 5511-5539. Google Scholar

[3]

Y. Cai, E. F. Haratsch, O. Mutlu and K. Mai, Error patterns in MLC NAND flash memory: Measurement, characterization and analysis in Des. Autom. Test Europ. Conf. Exhib. (DATE), 2012.Google Scholar

[4]

A. R. Calderbank and N. Seshadri, Multilevel codes for unequal error protection, IEEE Trans. Inf. Theory, 39 (1993), 1234-1248. Google Scholar

[5]

R. Cohen and Y. Cassuto, Iterative decoding of LDPC codes over the $q$-ary partial erasure channel, IEEE Trans. Inf. Theory, 62 (2016), 2658-2672. Google Scholar

[6]

D. Declercq and M. Fossorier, Decoding algorithms for nonbinary LDPC codes over $\text{GF}(q)$, IEEE Trans. Commun., 55 (2007), 633-643. Google Scholar

[7]

R. Gabrys, E. Yaakobi and L. Dolecek, Graded bit-error-correcting codes with applications to flash memory, IEEE Trans. Inf. Theory, 59 (2013), 2315-2327. Google Scholar

[8]

R. Gabrys, E. Yaakobi, L. Grupp, S. Swanson and L. Dolecek, Tackling intracell variability in TLC flash through tensor product codes in Proc. IEEE Int. Symp. Inf. Theory, Cambridge, 2012.Google Scholar

[9]

R. G. Gallager, Low Density Parity Check Codes, MIT Press, 1963.Google Scholar

[10]

K. Haymaker and C. A. Kelley, Structured bit-interleaved LDPC codes for MLC flash memory, IEEE J. Sel. Areas Commun., 32 (2014), 870-879. Google Scholar

[11]

J. Huber, U. Wachsmann and R. Fischer, Coded modulation by multilevel-codes: Overview and state of the art in ITG-Fachberichte Conf. Rec., Aachen, 1998. Google Scholar

[12]

H. Imai and S. Hirakawa, A new multilevel coding method using error-correcting codes, IEEE Trans. Inf. Theory, 23 (1977), 371-377. Google Scholar

[13]

M. Moser and P. Chen, A Student's Guide to Coding and Information Theory, Cambridge Univ. Press, Cambridge, 2012. Google Scholar

[14]

T. Richardson, A. Shokrollahi and R. Urbanke, Design of capacity-approaching irregular low-density parity-check codes, IEEE Trans. Inf. Theory, 47 (2001), 619-637. Google Scholar

[15]

T. J. Richardson and R. L. Urbanke, The capacity of low-density parity-check codes under message passing decoding, IEEE Trans. Inf. Theory, 47 (2001), 599-618. Google Scholar

[16]

R. M. Tanner, A recursive approach to low complexity codes, IEEE Trans. Inf. Theory, 27 (1981), 533-547. Google Scholar

[17]

T. Tao and V. H. Vu, Additive Combinatorics, Cambridge Univ. Press, 2006. Google Scholar

[18]

U. Wachsmann, R. F. H. Fischer and J. B. Huber, Multilevel codes: Theoretical concepts and practical design rules, IEEE Trans. Inf. Theory, 45 (1999), 1361-1391. Google Scholar

[19]

Z. Zhang, W. Xiao, N. Park and D. J. Lilja, Memory module-level testing and error behaviors for phase change memory in IEEE 30th Int. Conf. Comp. Des. (ICCD), 2012.Google Scholar

Figure 1.  $4$-ary partial erasure channel (QPEC) with $M=2$. Here, the binary representation of each $4$-ary symbol is shown.
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Figure 2.  $4$-ary multilevel erasure channel with erasure probability $\varepsilon$ and bit error probability $\gamma$.
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Figure 3.  $I(X;Y)$ as a function of $\varepsilon$, given a uniform input distribution.
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Figure 4.  Subchannel for $X_1$ on $4$-ary multilevel erasure channel with parameters $\varepsilon,\gamma$.
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Figure 5.  Subchannel for $X_2$ on $4$-ary multilevel erasure channel with parameters $\varepsilon,\gamma$.
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Figure 6.  Subchannel for $X_1$ on 4-ary partial erasure channel (QPEC) with erasure probability $\varepsilon$.
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Figure 7.  Subchannel for $X_2$ on 4-ary partial erasure channel (QPEC) with erasure probability $\varepsilon$.
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