Using Continuous Power Modulation for Exchanging Local Channel State Information

TL;DR

This paper introduces a simple, efficient method for transmitters in interference networks to exchange local channel state information using continuous power modulation, requiring only signal power measurements at receivers.

Contribution

It proposes a novel technique that enables local channel state exchange without inter-transmitter signaling channels, relying solely on power measurements at receivers.

Findings

Requires only power measurements at intended receivers

Eliminates need for direct inter-transmitter signaling channels

Uses transient power levels as linear combinations of channel gains

Abstract

This letter provides a simple but efficient technique, which allows each transmitter of an interference network, to exchange local channel state information with the other transmitters. One salient feature of the proposed technique is that a transmitter only needs measurements of the signal power at its intended receiver to implement it, making direct inter-transmitter signaling channels unnecessary. The key idea to achieve this is to use a transient period during which the continuous power level of a transmitter is taken to be the linear combination of the channel gains to be exchanged.