Accelerated information reconciliation with elastic reconfiguration and check node-driven termination in fiber...

Area of Science:

• Optical communication
• Physical layer security
• Information theory

Background:

• Traditional information reconciliation (IR) protocols struggle with noise and interference in physical layer secure key generation and distribution (PLSKGD).
• Limitations in mitigating initial key inconsistencies hinder efficient and secure key exchange.

Purpose of the Study:

• To develop advanced solutions for PLSKGD in optical fiber communication.
• To enhance error correction performance and accelerate IR processes.
• To address limitations of traditional IR protocols in noisy environments.

Main Methods:

• Introduced a check node correlation coefficient-based early termination (CNCC-ET) scheme to reduce decoding complexity by monitoring message correlations.
• Developed an elastic reconfigurable (ER) scheme that dynamically adjusts information to check bit ratios based on bit error rate (BER).
• Validated the proposed schemes through hardware implementation on a Xilinx Virtex-7 FPGA.

Main Results:

• CNCC-ET scheme achieved up to a 51.8% reduction in average iteration counts in high BER regions.
• ER scheme resulted in a 90.26% frame error rate (FER) reduction in high-BER scenarios.
• Hardware implementation demonstrated a 47.2% reduction in IR time overhead and improved error correction.

Conclusions:

• The proposed CNCC-ET and ER schemes significantly improve error correction and accelerate IR for PLSKGD.
• These innovations enhance the security and efficiency of optical fiber communication systems.
• The methods show potential for broader applications in physical layer security contexts.