Delay-Exponent of Bilayer Anytime Code

TL;DR

This paper introduces a bilayer anytime code for relay networks, analyzing its delay-exponent using density evolution and mathematical induction, providing analytical expressions that match numerical results.

Contribution

It proposes a novel bilayer anytime code based on spatially coupled LDPC codes and derives analytical delay-exponent expressions.

Findings

Analytical delay-exponent closely matches numerical results.

The code design improves understanding of delay performance in relay networks.

Density evolution effectively analyzes the anytime properties of the code.

Abstract

In this paper, we study the design and the delay-exponent of anytime codes over a three terminal relay network. We propose a bilayer anytime code based on anytime spatially coupled low-density parity-check (LDPC) codes and investigate the anytime characteristics through density evolution analysis. By using mathematical induction technique, we find analytical expressions of the delay-exponent for the proposed code. Through comparison, we show that the analytical delay-exponent has a close match with the delay-exponent obtained from numerical results.