'Institute of Electrical and Electronics Engineers (IEEE)'
Doi
Abstract
We design new secure on-off transmission schemes
in wiretap channels with outdated channel state information
(CSI). In our design we consider not only the outdated CSI from
the legitimate receiver but two distinct scenarios, depending on
whether or not the outdated CSI from the eavesdropper is known
at the transmitter. Under this consideration our schemes exploit
the useful knowledge contained in the available outdated CSI,
based on which the transmitter decides whether to transmit or
not. We derive new closed-form expressions for the transmission
probability, the connection outage probability, the secrecy outage
probability, and the reliable and secure transmission probability
to characterize the achievable performance. Based on these
results, we present the optimal solutions that maximize the
secrecy throughput under dual connection and secrecy outage
constraints. Our analytical and numerical results offer detailed
insights into the design of the wiretap coding parameters and
the imposed outage constraints. We further show that allowing
more freedom on the codeword transmission rate enables a larger
feasible region of the dual outage constraints by exploiting the
trade-off between reliability and security.ARC Discovery Projects Grant DP15010390