Optimization of code rates in SISOME wiretap channels

Shihao Yan, Nan Yang, Giovanni Geraci, Robert Malaney, Jinhong Yuan

Research output: Contribution to journalArticle

40 Citations (Scopus)

Abstract

We propose a new framework for determining the wiretap code rates of single-input-single-output multiantenna eavesdropper wiretap channels when the capacity of the eavesdropper's channel is not available at the transmitter. In our framework, we introduce the effective secrecy throughput (EST) as a new performance metric that explicitly captures the two key features of wiretap channels, namely, reliability and secrecy. Notably, the EST measures the average rate of the confidential information transmitted from the transmitter to the intended receiver without being eavesdropped on. We provide easy-to-implement methods to determine the wiretap code rates for two transmission schemes: 1) adaptive transmission scheme in which the capacity of the main channel is available at the transmitter and 2) fixed-rate transmission scheme in which the capacity of the main channel is not available at the transmitter. Such determinations are further extended into an absolute-passive eavesdropping scenario where even the average signal-to-noise ratio of the eavesdropper's channel is not available at the transmitter. Notably, our solutions for the wiretap code rates do not require us to set reliability or secrecy constraints for the transmission within wiretap channels.
Original languageEnglish
Pages (from-to)6377-6388
Number of pages12
JournalIEEE Transactions on Wireless Communications
Volume14
Issue number11
DOIs
Publication statusPublished - Nov 2015
Externally publishedYes

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