Preprocessing for Physical-Layer Security in Wireless THz-Communication

In this paper, the usage of preprocessing to achieve physical-layer security in a wireless THz-MIMO scenario is investigated.

The goal is a reliable and secure communication.

Optimization of the preprocessing is done either based on the error performance or the transmission rate.

For both criteria, we present a variant that is based only on the legitimate receiver or also includes the eavesdropper.

For each variant, linear and lattice-reduction-aided approaches are considered.

Numerical simulations are used to assess the resulting secrecy rates and error ratios.

A comparison between all variants is compiled and the possible trade-offs are discussed.