On Layered Erasure Interference Channels without CSI at Transmitters

TL;DR

This paper investigates the capacity limits of layered erasure interference channels with receiver-only channel state information, providing new tight outer bounds and extending previous results in many scenarios.

Contribution

It introduces a new outer bound for the capacity region of layered erasure interference channels without transmitter CSI, improving understanding of such channels.

Findings

Outer bound derived for capacity region

Bound is tight in many cases

Extends previous results in open cases

Abstract

This paper studies a layered erasure model for two-user interference channels, which can be viewed as a simplified version of Gaussian fading interference channel. It is assumed that channel state information~(CSI) is only available at receivers but not at transmitters. Under such assumption, an outer bound is derived for the capacity region of such interference channel. The new outer bound is tight in many circumstances. For the remaining open cases, the outer bound extends previous results.