The effect of correlated fading reduces the
performance gain in multi-antenna communications. Diversity combining is a well-known
technique to reduce the effect of correlation. But still, it is
an open problem to quantify asthe diversity scheme is more efficient in enhancing the security of cellular
multicast network mitigating the effects of correlation. Motivated by this
issue, this paper considers a secure wireless multicasting scenario through
correlated cellular networks in the presence
of multiple eavesdroppers. The selection combining (SC) and switch and stay combining
(SSC) techniques are considered in
dual arbitrarily correlated Nakagami-m fading channels. The closed-form analytical expressions for the probability of
non-zero secrecy multicast capacity and the secure outage probability
for multicasting are derived to understand the insight into the effects of correlation on the SC and SSC diversity schemes and to
quantify which diversity scheme is more efficient in enhancing the security of
correlated multicast networks. The results show that, although the diversity
gain reduces the effect of correlation, the diversity gain provided by the SC
diversity scheme is more significant in mitigating the effect of correlation
compared to the SSC diversity scheme. Due to the selection mechanism of SC
diversity, it is more sensitive to the change of SNR of the eavesdropper’s channel compared to the case of the
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