Abstract:
This letter studies the performance of reconfigurable
intelligent surface (RIS)-aided networks over Nakagami-m fading
channels. First, we derive accurate closed-form approximations
for the system channel distributions, and then, use them in
deriving closed-form approximations for the outage probability,
average symbol error probability (ASEP), and the average
channel capacity. In addition, to get more insights at the system
performance, we derive asymptotic expression for the outage
probability at the high signal-to-noise ratio (SNR) regime, and
provide closed-form expressions for the system diversity order
and coding gain. Results show that the considered RIS scenario
can provide a diversity order of a+1/2, where a is a function of the
Nakagami-m fading parameter m and the number of reflecting
elements N. Furthermore, results illustrate that m is more
impactful on the diversity order and the system performance than
N. Finally, the provided results are valid for arbitrary number
of reflecting elements N and non-integer m.
