Density Evolution Analysis of Sparse-Block IDMA

TL;DR

This paper presents a density evolution analysis of SB-IDMA, a new unsourced multiple access protocol, offering a theoretical performance characterization for its interference cancellation receiver.

Contribution

It introduces a density evolution framework for SB-IDMA, advancing understanding of its decoding performance in grant-free multiple access.

Findings

The analysis provides insights into the convergence behavior of SB-IDMA.

It characterizes the error probability performance of the successive interference cancellation receiver.

The work supports the design and optimization of SB-IDMA systems.

Abstract

Sparse block interleaver division multiple access (SB-IDMA) is a recently introduced unsourced multiple access protocol that aims to improve the performance of the grant-free two-step random access transmission protocol of the 3GPP 5G New Radio standard. We introduced a density evolution analysis of the successive interference cancellation receiver of SB-IDMA, providing a theoretical characterization of its performance.