We consider an AF dual-hop transmis

We consider an AF dual-hop transmission network with one
source, , one destination, , and relays. has no direct link with , and the transmission is performed only through
relays. periodically monitors the quality of its connectivity
with the relays via transmission of a local feedback. We assume
that this feedback link has a time delay of . Based on the outdated CSI, selects a single relay, , with the th worst
link. After that the communication takes place in two
time slots. During the first time slot, transmits its signal, ,
with an average power normalized to unity to the selected relay.
In the second time slot, the relay amplifies the received signal
and the output is transmitted to .

Kết quả (Anh) 1:

We consider an AF dual-hop transmission network with onesource, destination, one, and relays. has no direct link with, and the transmission is performed only throughrelays. periodically monitors the quality of its connectivitywith the relays via transmission of a local feedback. We assumethat this feedback link has a time delay of. Based on the outdated CSI, selects a single relay,, with the th worstlink. After that the communication takes place in twotime slots. During the first time slot, transmits its signal,,with an average power normalized to unity to the selected relay.In the second time slot, the relay amplifies the received signaland the output is transmitted to.