Noise-Domain Non-Orthogonal Multiple Access

TL;DR

This paper introduces noise-domain non-orthogonal multiple access (ND-NOMA), a novel communication scheme that modulates noise properties to enable low-power, low-complexity multi-user communication suitable for IoT networks, with proven low error rates.

Contribution

The paper proposes ND-NOMA, a new scheme that uses noise modulation instead of power allocation, reducing system complexity and power consumption for IoT applications.

Findings

Achieves low bit error rates in Rician fading channels

Reduces power consumption and system complexity compared to traditional NOMA

Supports robust multi-user communication with simple detection methods

Abstract

In this paper, we present noise-domain non-orthogonal multiple access (ND-NOMA), an innovative communication scheme that utilizes the modulation of artificial noise mean and variance to convey information. Distinct from traditional methods such as power-domain non-orthogonal multiple access (PD-NOMA) that heavily rely on successive interference cancellation (SIC), ND-NOMA utilizes the noise domain, considerably reducing power consumption and system complexity. Inspired by noise modulation, ND-NOMA provides lower bit error probability (BEP), making it highly suitable for next-generation Internet-of-things (IoT) networks. Our theoretical analyses and computer simulations reveal that ND-NOMA can achieve exceptionally low bit error rates in both uplink and downlink scenarios, in the presence of Rician fading channels. The proposed multi-user system is supported by a minimum distance detector for mean detection and a threshold-based detector for variance detection, ensuring robust communication in low-power environments. By leveraging the inherent properties of noise, ND-NOMA offers a promising platform for long-term deployments of low-cost and low-complexity devices.