Ergodic Secrecy Rate of Antenna-Selection-Aided MIMOME Channels with BPSK/QPSK Modulations

TL;DR

This paper derives precise closed-form expressions for the ergodic secrecy rate of antenna-selection-aided MIMOME channels with BPSK/QPSK modulations, validated through simulations, advancing physical layer security analysis.

Contribution

It introduces novel closed-form formulas for ergodic secrecy rates in MIMOME channels with antenna selection, applicable to BPSK/QPSK modulations, with high accuracy.

Findings

Closed-form ergodic secrecy rate expressions derived.

Formulas validated by simulations showing high accuracy.

Analysis applicable to practical secure communication systems.

Abstract

This paper analyzes transmit antenna selection (TAS) under Rayleigh flat fading for BPSK/QPSK modulations in multiple-input multiple-output wiretap channels, also termed as multiple-input multiple-output multiple-eavesdropper (MIMOME) channels. In our protocol, a single antenna is selected to transmit the secret message and selection combing (SC) or maximal-ratio combing (MRC) is utilized at the legitimate receiver or the eavesdropper. Novel closed-form expressions for the ergodic secrecy rates are derived to approximate the exact values, which hold high precision and compact forms. Besides theoretical derivations, simulations are provided to demonstrate the feasibility and validity of the proposed formulas.