Design of LDPC Codes for the Unequal Power Two-User Gaussian Multiple Access Channel

TL;DR

This paper presents a framework for designing LDPC codes tailored for the unequal power two-user Gaussian multiple access channel, achieving near-optimal sum-rate performance and demonstrating strong finite-length results.

Contribution

The paper introduces a novel LDPC code design method using EXIT charts specifically for the unequal power two-user Gaussian MAC, improving sum-rate efficiency.

Findings

Codes achieve sum-rate close to channel maximum

Demonstrates excellent finite-length performance

Framework applicable to unequal power scenarios

Abstract

In this work, we describe an LDPC code design framework for the unequal power two-user Gaussian multiple access channel using EXIT charts. We show that the sum-rate of the LDPC codes designed using our approach can get close to the maximal sum-rate of the two-user Gaussian multiple access channel. Moreover, we provide numerical simulation results that demonstrate the excellent finite-length performance of the designed LDPC codes.