Logo
ScienceStack
Table of Contents
Fetching ...
Sign In

Leakage Subspace Precoding and Scheduling for Physical Layer Security in Multi-User XL-MIMO Systems

Gonzalo J. Anaya-Lopez, Jose P. Gonzalez-Coma, F. Javier Lopez-Martinez

TL;DR

It is shown that the consideration of spherical-wavefront propagation inherent to these set-ups is beneficial for physical-layer security, as it provides immunity against eavesdroppers located in similar angular directions that would otherwise prevent secure communication under classical planar-wave front propagation.

Abstract

We investigate the achievable secrecy sum-rate in a multi-user XL-MIMO system, on which user distances to the base station become comparable to the antenna array dimensions. We show that the consideration of spherical-wavefront propagation inherent to these set-ups is beneficial for physical-layer security, as it provides immunity against eavesdroppers located in similar angular directions that would otherwise prevent secure communication under classical planar-wavefront propagation. A leakage subspace precoding strategy is also proposed for joint secure precoding and user scheduling, which allows to improve the secrecy sum-rate compared to conventional zero-forcing based strategies, under different eavesdropper collusion strategies.

Leakage Subspace Precoding and Scheduling for Physical Layer Security in Multi-User XL-MIMO Systems

TL;DR

It is shown that the consideration of spherical-wavefront propagation inherent to these set-ups is beneficial for physical-layer security, as it provides immunity against eavesdroppers located in similar angular directions that would otherwise prevent secure communication under classical planar-wave front propagation.

Abstract

We investigate the achievable secrecy sum-rate in a multi-user XL-MIMO system, on which user distances to the base station become comparable to the antenna array dimensions. We show that the consideration of spherical-wavefront propagation inherent to these set-ups is beneficial for physical-layer security, as it provides immunity against eavesdroppers located in similar angular directions that would otherwise prevent secure communication under classical planar-wavefront propagation. A leakage subspace precoding strategy is also proposed for joint secure precoding and user scheduling, which allows to improve the secrecy sum-rate compared to conventional zero-forcing based strategies, under different eavesdropper collusion strategies.
Paper Structure (5 sections, 14 equations, 4 figures, 1 table, 1 algorithm)

This paper contains 5 sections, 14 equations, 4 figures, 1 table, 1 algorithm.

Table of Contents

  1. Introduction
  2. System model
  3. User scheduling and precoding design
  4. Numerical Results
  5. Conclusion

Figures (4)

  • Figure 1: Achievable secrecy sum-rate in the TC scenario, considering SW and PW propagation and different precoding strategies. Solid/dashed lines correspond to ($K_{\rm B}=10$) and ($K_{\rm B}=20$), respectively.
  • Figure 2: Number of served users in the TC scenario, considering SW and PW propagation and different precoding strategies. Solid/dashed lines correspond to ($K_{\rm B}=10$) and ($K_{\rm B}=20$), respectively.
  • Figure 3: Achievable secrecy sum-rate in the PC scenario, considering SW and PW propagation and different precoding strategies. Solid/dashed lines correspond to ($K_{\rm B}=10$) and ($K_{\rm B}=20$), respectively.
  • Figure 4: Number of served users in the PC scenario, considering SW and PW propagation and different precoding strategies. Solid/dashed lines correspond to ($K_{\rm B}=10$) and ($K_{\rm B}=20$), respectively.