Achievable Rate Regions for Cooperative Relay Broadcast Channels with Rate-limited Feedback

TL;DR

This paper proposes new achievable rate regions for cooperative relay broadcast channels with rate-limited feedback, demonstrating improvements over existing regions that consider only relaying or feedback separately.

Contribution

The paper introduces combined rate regions for relay broadcast channels with feedback, integrating relaying and feedback to enhance communication performance.

Findings

Proposed rate regions outperform existing ones.

Feedback and relaying cooperation jointly improve achievable rates.

Theoretical analysis confirms the benefits of combined strategies.

Abstract

Achievable rate regions for cooperative relay broadcast channels with rate-limited feedback are proposed. Specifically, we consider two-receiver memoryless broadcast channels where each receiver sends feedback signals to the transmitter through a noiseless and rate-limited feedback link, and meanwhile, acts as relay to transmit cooperative information to the other receiver. It's shown that the proposed rate regions improve on the known regions that consider either relaying cooperation or feedback communication, but not both.