Secrecy Analysis of Massive MIMO Systems with MRT Precoding Using Normalization Methods

In this paper, the secrecy sum-rate performance of single cell downlink massive multiple-input-multiple-output (MIMO) systems is investigated in the presence of an eavesdropper and jammers by adopting the maximum ratio transmission (MRT) precoding technique. Vector and matrix normalization are considered to derive an approximate closed-form expression for ergodic achievable secrecy sum-rate (SSR) for both low and high signal to noise ratio regime. It is observed that the secrecy sum-rate achieved using matrix normalization is always better than vector normalization for MRT. The analytical findings are validated using numerical simulation.