Performance Guarantees of SIC-Based Decoding for VLSF Codes in Hardcore-Regulated MAC

2026-09-29

AI Summary

This study addresses the challenge of ensuring low latency and reliability for variable-length stop-feedback (VLSF) codes under successive interference cancellation (SIC) decoding in hard-core regulated multiple-access channels. A spatial regulation-based scheme is proposed to enhance communication reliability. This work establishes the first unified theoretical framework for performance guarantees of VLSF codes under hard-core point processes. By deriving a lower bound on the signal-to-interference-plus-noise ratio and introducing an inverse Gaussian distribution approximation, the decoding delay distribution is precisely quantified. Numerical results demonstrate that the proposed mechanism provides consistent performance guarantees and strict delay upper bounds across all links, effectively supporting ultra-reliable low-latency communication scenarios.

Abstract

Spatial regulation suffices to guarantee reliable, low-latency communication using variable-length stop-feedback (VLSF) codes over multiple access channels. The delay performance of VLSF codes under successive interference cancellation is characterized for transmitters within a coverage region. For deployments modeled by hardcore point processes, the signal-to-interference-plus-noise ratio (SINR) admits a positive lower bound for all transmitters within the coverage region. Under a predefined total error probability constraint, these transmitters are decodable within an upper-bounded delay. For each transmitter, the decoding delay is well approximated by an inverse Gaussian distribution parameterized by the codebook size, target error probability, and the SINR lower bound. Numerical results confirm that hardcore regulation provides uniform performance guarantees across links.

Problem

• VLSF codes
• successive interference cancellation
• multiple access channels
• hardcore point processes
• decoding delay

Innovation

• Variable-length stop-feedback (VLSF) codes
• Successive interference cancellation (SIC)
• Hardcore point processes
• Multiple access channels (MAC)
• Inverse Gaussian distribution