Curved Non-Uniform Schedules for Sliding Window Decoding of SC-LDPC Codes 


Vol. 51,  No. 1, pp. 60-68, Jan.  2026
10.7840/kics.2026.51.1.60


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  Abstract

This paper proposes a new curved non-uniform schedule to improve the performance-complexity tradeoff of sliding window decoding (SWD) in spatially-coupled low-density parity-check (SC-LDPC) codes. The existing straight Pragmatic schedule reduces complexity compared to Uniform schedule, but also reduces BER performance when the number of iterations is low. This paper designs two curved schedules using convex and concave curves to flexibly adjust the balance between error correction performance and decoding complexity. Simulations were conducted using two SC-LDPC code sizes (10000×5100 and 100000×51000) and various window sizes (W=8, 10, 12). The results show that the convex curved non-uniform schedule maintains BER performance while reducing complexity compared to Uniform schedule even with fewer iterations, whereas the concave curved non-uniform schedule exhibits significant performance degradation but has the lowest complexity.

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[IEEE Style]

S. Chae, H. Choi, G. Kim, H. Song, "Curved Non-Uniform Schedules for Sliding Window Decoding of SC-LDPC Codes," The Journal of Korean Institute of Communications and Information Sciences, vol. 51, no. 1, pp. 60-68, 2026. DOI: 10.7840/kics.2026.51.1.60.

[ACM Style]

Sangwon Chae, Hyojeong Choi, Gangsan Kim, and Hong-Yeop Song. 2026. Curved Non-Uniform Schedules for Sliding Window Decoding of SC-LDPC Codes. The Journal of Korean Institute of Communications and Information Sciences, 51, 1, (2026), 60-68. DOI: 10.7840/kics.2026.51.1.60.

[KICS Style]

Sangwon Chae, Hyojeong Choi, Gangsan Kim, Hong-Yeop Song, "Curved Non-Uniform Schedules for Sliding Window Decoding of SC-LDPC Codes," The Journal of Korean Institute of Communications and Information Sciences, vol. 51, no. 1, pp. 60-68, 1. 2026. (https://doi.org/10.7840/kics.2026.51.1.60)
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pISSN : 1226 - 4717
eISSN : 2287 - 3880