Outage Probability of Power-based Non-Orthogonal Multiple Access (NOMA) on the Uplink of a 5G Cell

TL;DR

This paper derives a closed-form analytical expression for the outage probability of power-based NOMA in uplink 5G scenarios, considering SIC and Rayleigh fading, highlighting dependencies on SNR and user distance.

Contribution

It provides the first closed-form outage probability expression for uplink power-based NOMA with arbitrary user signals and Rayleigh fading, enhancing performance analysis accuracy.

Findings

Outage probability depends on user SNR and distance from the receiver.

Closed-form expression enables precise outage analysis for uplink NOMA.

The approach considers arbitrary numbers of superimposed signals with SIC.

Abstract

This letter puts forth an analytical approach to evaluate the outage probability of power-based NOMA on the uplink of a 5G cell, the outage being defined as the event where the receiver fails to successfully decode all the simultaneously received signals. In the examined scenario, Successive Interference Cancellation (SIC) is considered and an arbitrary number of superimposed signals is present. For the Rayleigh fading case, the outage probability is provided in closed-form, clearly outlining its dependency on the signal-to-noise ratio of the users that are simultaneously transmitting, as well as on their distance from the receiver.