Hybrid Digital-Analog Codes for Source-Channel Broadcast of Gaussian Sources over Gaussian Channels

TL;DR

This paper introduces a hybrid digital-analog coding scheme for broadcasting Gaussian sources over Gaussian channels, improving performance in bandwidth mismatch scenarios compared to previous methods.

Contribution

The paper proposes a novel hybrid coding strategy combining multiple coding techniques, advancing the state-of-the-art in Gaussian source broadcast over Gaussian channels.

Findings

Improved distortion performance in bandwidth mismatch scenarios.

Outperforms existing schemes in Gaussian source broadcasting.

Demonstrates the effectiveness of hybrid coding in practical settings.

Abstract

The problem of broadcasting a parallel Gaussian source over an additive white Gaussian noise broadcast channel under the mean-squared error distortion criterion is studied. A hybrid digital-analog coding strategy which combines source coding with side information, channel coding with side information, layered source coding, and superposition broadcast channel coding is presented. When specialized to the open problem of broadcasting a white Gaussian source over an additive white Gaussian noise broadcast channel with bandwidth mismatch which has been the subject of several previous investigations, this coding scheme strictly improves on the state-of-the-art.