# Energy-efficient techniques for combating the influence of reactive jamming using Non-Orthogonal Multiple Access and Distributed Antenna Systems

## TL;DR

This paper proposes energy-efficient resource allocation techniques for 5G downlink systems using NOMA and DAS to mitigate reactive jamming effects, enhancing robustness while maintaining low complexity.

## Contribution

It introduces joint subband, power, and antenna assignment strategies leveraging jamming statistics for improved energy efficiency and robustness in 5G systems.

## Key findings

- NOMA combined with DAS significantly improves jamming resilience.
- The proposed methods maintain moderate receiver complexity.
- Resource allocation based on jamming prediction enhances system robustness.

## Abstract

The aim of this work is to propose new approaches for maximizing the energy efficiency of downlink 5G mobile communication systems, in the presence of a reactive jammer. The concepts of non-orthogonal multiple access (NOMA) and distributed antenna systems (DAS) are exploited to devise joint subband, power and antenna assignment techniques, so as to guarantee a certain quality of service (QoS) to users. Also, the scheduler relies on jamming statistics, observed at the end of each timeslot, to perform resource allocation based on the prediction of the jammer behavior over the next timeslot. A particular care is given, in the proposed techniques, to maintain a moderate complexity at the receiver level, and to limit the number of active RRHs (remote radio heads) in the cell. Simulation results show that a proper combination of NOMA with DAS can allow a significant enhancement of the system robustness to jamming, with respect to centralized antenna systems and orthogonal multiple access.

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Source: https://tomesphere.com/paper/1903.11574