School of Computing/Blekinge Institute of Technology
Doi
Abstract
In this paper, we study the performance for the primary and secondary
transmissions in cognitive radio networks
where the amplify-and-forward (AF) secondary relay helps to transmit the
signals for both the primary and secondary transmitters over independent
Nakagami-m fading. First, we derive exact closed-form expressions for outage
probability and symbol error rate (SER) of the primary network. Then, we derive
an exact closed-form expression for outage probability and a closed-form
expression of a tight upper bound for SER of the secondary network.
Furthermore, we also make a comparison for the performance of the primary
system with and without the
help of the secondary relay
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