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article · IEEE Internet of Things Journal · 2025

Improved Successive Cancelation List Decoding for Polar Codes Using Vulnerable Frozen Bits LLRs

Qasim Jan, Zakir Ali, Hafeez Anwar, Shahid Hussain, Zhiwen Pan

Cited by 0Abstract and details only

Abstract

Successive cancellation list (SCL) decoding for polar codes has the ability to achieve Shannon capacity over the binary discrete memoryless channel. However, a large list size is required to achieve the Shannon capacity limit. Consequently, this paper proposes a novel iterative method for the CA-SCL decoder based on frozen bits to improve the error-correction performance of CA-SCL decoding for polar codes with smaller list sizes. The proposed technique determines the vulnerable channel log-likelihood ratios (LLRs) for frozen bits that degrade the CA-SCL decoding error correction performance and corrects them for the next CA-SCL decoding attempt. We analyze the behavior of wrongly estimated LLRs of frozen bits during CA-SCL decoding and design an attenuation factor set using a greedy algorithm. The proposed technique employs iterative CA-SCL decoding and revises the wrongly estimated frozen bit LLRs using the attenuation factor set during the decoding process. The simulation results show that the proposed technique achieves a block error rate (BLER) performance gain of up to 0.25 compared with the CA-SCL decoder, with a minor increase in computational complexity. Moreover, the attenuation factor set can be adjusted arbitrarily to balance performance and complexity.

Cite this paper

APA 7

Jan, Q., Ali, Z., Anwar, H., Hussain, S., & Pan, Z. (2025). Improved Successive Cancelation List Decoding for Polar Codes Using Vulnerable Frozen Bits LLRs. IEEE Internet of Things Journal, 12(14), 28964–28974. https://doi.org/10.1109/jiot.2025.3567642

MLA 9

Jan, Qasim, et al. “Improved Successive Cancelation List Decoding for Polar Codes Using Vulnerable Frozen Bits LLRs.” IEEE Internet of Things Journal, vol. 12, no. 14, 2025, pp. 28964–74, https://doi.org/10.1109/jiot.2025.3567642.

Chicago

Jan, Qasim, Zakir Ali, Hafeez Anwar, Shahid Hussain, and Zhiwen Pan. 2025. “Improved Successive Cancelation List Decoding for Polar Codes Using Vulnerable Frozen Bits LLRs.” IEEE Internet of Things Journal 12 (14): 28964–74. https://doi.org/10.1109/jiot.2025.3567642.

Harvard

Jan, Q. et al. (2025) ‘Improved Successive Cancelation List Decoding for Polar Codes Using Vulnerable Frozen Bits LLRs’, IEEE Internet of Things Journal, 12(14), pp. 28964–28974. Available at: https://doi.org/10.1109/jiot.2025.3567642.

BibTeX
@article{jan2025improved,
  title = {{Improved Successive Cancelation List Decoding for Polar Codes Using Vulnerable Frozen Bits LLRs}},
  author = {Jan, Qasim and Ali, Zakir and Anwar, Hafeez and Hussain, Shahid and Pan, Zhiwen},
  journal = {IEEE Internet of Things Journal},
  volume = {12},
  number = {14},
  pages = {28964--28974},
  year = {2025},
  doi = {10.1109/jiot.2025.3567642}
}

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