A cognitive radio scenario is considered where the signals transmitted by a secondary user (SU) are relayed by multi-antenna relays using an amplify-and-forward cooperation protocol. In this paper, the optimal power allocation and beamforming scheme …
In this contribution, a cognitive radio scenario is considered, where a secondary user (SU) cooperative network is allowed to transmit concurrently with a primary user (PU), provided that the resulting average interference power at the PU receiver is …
We consider a cognitive radio (CR) scenario where the signals transmitted by a secondary user are relayed using an amplify-and-forward cooperation protocol. A distributed strategy for power allocation is derived that minimizes the outage probability …
Cooperative communications is a well known technique to yield transmit diversity in a multi-user environment. Network coding can increase the spectral efficiency in networks. These two techniques can be combined to achieve a double diversity order …
We study low-density parity-check (LDPC) codes with iterative decoding on block fading (BF) Relay Channels. We use coded cooperation, a variant of decode-and-forward with a smaller outage probability than the latter. We derive a new code structure by …
We study low-density parity-check (LDPC) codes with iterative decoding on block fading (BF) Relay Channels. We use coded cooperation, a variant of decode-and-forward with a smaller outage probability than the latter. We derive a new code structure by …