Preprocessing for Physical-Layer Security in Wireless THz-Communication
2026-06-29 • Information Theory
Information Theory
AI summaryⓘ
The authors study how to make wireless communication using terahertz signals safer by doing some smart preparation of the signal before sending it. They look at two ways to optimize this preparation: one focusing on reducing errors and the other on increasing the data rate. They also test methods that either consider just the intended receiver or include potential eavesdroppers. By using simulations, the authors compare these methods and discuss how improving security might affect performance.
physical-layer securityTHz wireless communicationMIMOpreprocessingerror performancetransmission rateeavesdropperlinear methodslattice reductionsecrecy rate
Authors
Rebekka Schulz, Robert F. H. Fischer
Abstract
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.