Interference Modulation: A Novel Technique for Low-Rate and Power Efficient Multiple Access

TL;DR

This paper presents a novel interference modulation technique that leverages channel correlation and beamforming to enable low-rate, power-efficient multiple access suitable for 6G networks.

Contribution

It introduces a new interference modulation method that modulates interference power via beamforming, enabling low-data-rate, power-efficient communication for additional users.

Findings

Theoretical performance limits are established.

Bit error rate simulations match theoretical predictions.

Potential for reduced power communication in 6G networks.

Abstract

The majority of spatial signal processing techniques focus on increasing the total system capacity and providing high data rates for intended user(s). Unlike the existing studies, this paper introduces a novel interference modulation method that exploits the correlation between wireless channels to enable low-data-rate transmission towards additional users with a minimal power allocation. The proposed method changes the interference power at specific channels to modulate a low-rate on-off keying signal. This is achieved by appropriately setting the radiation pattern of front-end components of a transmitter, i.e., analog beamforming weights or metasurface configuration. The paper investigates theoretical performance limits and analyzes the efficiency in terms of sum rate. Bit error rate simulation results are closely matched with theoretical findings. The initial findings indicate that the proposed technique can be instrumental in providing reduced capability communication using minimal power consumption in 6G networks.