1 research outputs found
Fundamental properties of on-off transmission scheme for wiretap channels
This work reveals some fundamental properties of
an on-off transmission (OOT) scheme, in which a transmitter
sends signals occasionally as per the capacity of the main channel
in order to achieve physical layer security. To this end, we first
identify the widely used hybrid secrecy outage probability as
a function of the transmission probability and the conditional
secrecy outage probability of the OOT scheme. This indicates,
for the first time, that the hybrid secrecy outage probability
can be achieved by the OOT scheme. We then derive a lower
bound on the conditional secrecy outage probability of the OOT
scheme in case of transmission, which is solely determined by
the average signal-to-noise ratios (SNRs) of the main channel
and eavesdropper’s channel. Finally, we re-investigate the OOT
scheme within an absolutely completely passive eavesdropping
scenario, in which even the average SNR of the eavesdropper’s
channel is not required. Specifically, we derive an easy-evaluated
expression for the average conditional secrecy outage probability
of the OOT scheme by adopting an annulus threat model.ARC Discovery Projects Grant DP150103905