Selection Relaying Schemes for Cooperative Wireless Networks With Adaptive Modulation

Cooperative multiple-access scheme with antenna selection and incremental relaying

“…The decode-remodulate-and-forward (DreMF) protocol proposed in [12] is similar to the DF protocol, however, in the DF protocol the relay decode the signal before forwarding it, while in the DreMF the relay performs a remodulation of the source signal into a different constellation. Note that the DreMF can be used to improve the spatial diversity order of the system as well as to increase the spectral efficiency if the decoded signal is remodulated into a high order constellation.…”

Low complexity adaptive transmission scheme for cooperative networks with decode-and-forward relay

“…In [12] two adaptive modulation methods minimum error rate scheme (MERS) and maximum spectral efficiency scheme (MSES) for a DF relaying system has been investigated; it has exploited the assumption of errordetector relay and get rid of error propagation due to erroneous detection at the relay. Adaptive modulation in a multiple-relay system using relay selection is an effective way to increase the ASE [13].…”

A dynamic hybrid antenna/relay selection scheme for the multiple-access relay channel

“…In this scheme, the sources broadcast their information in the first time slot and, in the (N + 1)th time slot, if the channel threshold is satisfied, the N -th relay decodes and retransmits the signal to the destination node, with N denoting the number of relays. In [15], the decode-remodulate-and-forward (DreMF) protocol was proposed, which is similar to the SDF one, however, before the RSs retransmit their information, in the DreMF 978-1-4799-5863-4/14/$31.00 c 2014 IEEE protocol they first re-modulate the detected signals.…”