Jamming Detection in Massive MIMO Systems

TL;DR

This paper introduces a novel jamming detection method for massive MIMO systems using a generalized likelihood ratio test and unused pilots, demonstrating high detection accuracy with fewer resources.

Contribution

The paper proposes a new jamming detection technique leveraging unused pilots and likelihood ratio testing, enhancing security in MaMIMO systems.

Findings

Detection probability approaches one with more antennas and unused pilots

Performance improves with increased coherence blocks

Method is effective even with limited unused pilots

Abstract

This paper considers the physical layer security of a pilot-based massive multiple-input multiple-output (MaMIMO) system in presence of a multi-antenna jammer. To improve security of the network, we propose a new jamming detection method that makes use of a generalized likelihood ratio test over some coherence blocks. Our proposed method utilizes intentionally unused pilots in the network. The performance of the proposed detector improves by increasing the number of antennas at the base station, the number of unused pilots and also by the number of the coherence blocks that are utilized. Simulation results confirm our analyses and show that in the MaMIMO regime, perfect detection (i.e., correct detection probability is one) is achievable even with a small number of unused pilots.