Segurança na camada física em canais Wiretap com generalized selection combining e múltiplas antenas

Abstract

This thesis investigates the secrecy outage performance of multiple-input multiple-output (MIMO) wiretap channels, where a generalized selection combin- ing (GSC) scheme is assumed at the legitimate receiver, while the transmitter em- ploys a transmit antenna selection (TAS) technique and the eavesdropper adopts a maximal-ratio combining (MRC) scheme. Assuming that the eavesdropper is subject to noise and jamming, closed-form expressions for the secrecy outage probability and for the non-zero secrecy rate are derived. Based on the secrecy outage probability the diversity and array gains are determined after perform- ing an asymptotic analysis. The derived secrecy outage probability expression allows for arbitrary power distributed jamming signals, and are simplified to two special cases, i.e., distinct and equal power distributed jamming signals. Some representative numerical results are depicted to show the effects of the key sys- tem parameters on the secrecy performance. Finally, the proposed analysis is corroborated through Monte Carlo simulations.