Capacity Bounds for Multiuser Channels with Non-Causal Channel State Information at the Transmitters

TL;DR

This paper derives capacity bounds for multiuser channels with non-causal channel state information at transmitters, providing new insights into capacity regions and the impact of CSI in various models.

Contribution

It establishes new inner and outer bounds for multiuser channels with non-causal CSI and identifies cases where CSI at receivers does not influence capacity.

Findings

Capacity bounds for MAC, BC, and RC with non-causal CSI

Capacity regions in special deterministic cases

CSI at receivers does not affect capacity in certain models

Abstract

In this paper, capacity inner and outer bounds are established for the multiuser channels with Channel State Information (CSI) known non-causally at the transmitters: The Multiple Access Channel (MAC), the Broadcast Channel (BC) with common information, and the Relay Channel (RC). For each channel, the actual capacity region is also derived in some special cases. Specifically, it is shown that for some deterministic models with non-causal CSI at the transmitters, similar to Costa's Gaussian channel, the availability of CSI at the deterministic receivers does not affect the capacity region.