2 research outputs found
Amplify-and-Forward Relay Assisting both Primary and Secondary Transmissions in Cognitive Radio Networks over Nakagami-m Fading
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