Abstract
A cooperative relay network in the presence of
eavesdroppers, whose locations are distributed according to a
homogeneous Poisson point process, is considered. The relay
is equipped with a very large antenna array and can exploit
maximal ratio combing (MRC) in the uplink and maximal ratio
transmission (MRT) in the downlink. We consider a realistic
model that the channel state information of every eavesdropper
is not know as eavesdroppers tend to hide themselves in practice.
The destination is thus in a much weaker position than all the
eavesdroppers because it only receives the retransmitted signal
from the relay. Under such setting, we investigate the security
performance in two schemes for relaying operation: amplify-andforward
(AF) and decode-and-forward (DF). The secrecy outage
probability, the connection outage probability, and the trade-off
problem which is controlled by the source power allocation are
examined. Finally, suitable solutions for the source power (such
that once the transmission occurs with high reliability, the secure
risk is below a given threshold) are proposed for a trade-off
between security and reliability issue.
Original language | English |
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Number of pages | 13 |
Journal | IEEE Transactions on Communications |
Volume | 65 |
Issue number | 11 |
Early online date | 05 Jul 2017 |
DOIs | |
Publication status | Published - Nov 2017 |