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  3. Coding For Channels With Intermittent Feedback And Its Security Analysis.
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  3. Coding For Channels With Intermittent Feedback And Its Security Analysis.

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Coding for channels with intermittent feedback and its security analysis.

Jianwen Yang1, Qiang Huang1, Yating Lin2

  • 1Geely University of China, Chengdu, China.

Plos One
|April 29, 2026

View abstract on PubMed

Summary
This summary is machine-generated.

This study introduces new Schalkwijk-Kailath (SK) type schemes for communication channels with intermittent feedback. These schemes offer improved coding efficiency and secrecy, outperforming traditional LDPC codes.

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Area of Science:

  • Information Theory
  • Coding Theory
  • Wireless Communications

Background:

  • The Schalkwijk-Kailath (SK) scheme is known for its capacity-achieving performance and low complexity in Additive White Gaussian Noise (AWGN) channels with perfect feedback.
  • Extending the SK scheme to practical scenarios with imperfect feedback (intermittent or noisy) presents significant challenges.
  • Existing codes like LDPC and Polar codes, while effective, have limitations in certain performance aspects compared to the ideal SK scheme.

Purpose of the Study:

  • To design and analyze SK-type coding schemes for channels with intermittent, noise-free, and noisy feedback.
  • To establish performance relationships between coding blocklength, decoding error probability, transmission rate, and secrecy level.
  • To evaluate the achievable secrecy level using normalized equivocation as a metric.

Main Methods:

  • Development of a modified SK scheme for AWGN channels with intermittent noise-free feedback.
  • Extension of the proposed scheme to handle noisy intermittent feedback scenarios.
  • Analytical characterization of achievable transmission rates and secrecy levels.
  • Quantitative evaluation using normalized equivocation to measure secrecy performance.

Main Results:

  • A novel SK-type scheme is proposed for channels with intermittent feedback, achieving a characterized achievable rate.
  • The scheme is successfully extended to noisy intermittent feedback channels.
  • Perfect weak secrecy is demonstrated to be achievable under specific conditions.
  • Numerical results show lower SNR and shorter blocklengths compared to LDPC codes for a target error probability.

Conclusions:

  • The proposed SK-type schemes offer an efficient approach for channels with intermittent feedback, balancing coding complexity, error probability, and secrecy.
  • These schemes provide a viable alternative to existing codes like LDPC, especially in scenarios demanding high secrecy and efficiency.
  • The research provides a foundation for constructing advanced coding schemes for practical communication systems with imperfect feedback.