Achievable Regions for Interference Channels with Generalized and Intermittent Feedback

TL;DR

This paper investigates the capacity regions of interference channels with generalized and intermittent feedback, proposing new coding schemes that combine Han-Kobayash rate splitting, compress-and-forward, and interference alignment techniques.

Contribution

It introduces an inner bound on the capacity region for interference channels with generalized feedback and adapts coding schemes for intermittent feedback scenarios, providing new insights.

Findings

Established an inner bound on the capacity region.

Developed a coding scheme combining Han-Kobayash and compress-and-forward.

Applied results to linear deterministic interference channels.

Abstract

In this paper, we first study a two-user interference channel with generalized feedback. We establish an inner bound on its capacity region. The coding scheme that we employ for the inner bound is based on an appropriate combination of Han-Kobayash rate splitting and compress-and-forward at the senders. Each sender compresses the channel output that is observes using a compression scheme that is \`a-la Lim et al. noisy network coding and Avestimeher et al. quantize-map-and-forward. Next, we study an injective deterministic model in which the senders obtain output feedback only intermittently. Specializing the coding scheme of the model with generalized feedback to this scenario, we obtain useful insights onto effective ways of combining noisy network coding with interference alignment techniques. We also apply our results to linear deterministic interference channels with intermittent feedback.