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The outage behavior of a dual-hop multi-source multi-relay cooperative communication network is investigated. With the presence of multiple cochannel interferers at both the relays and destination, we propose a signal-to-interference-plus-noise ratio based scheme for the combined use of cooperative diversity and multiuser diversity. Firstly, the best source node with the highest direct-link signal-to-interference-plus-noise...
In this paper, to guarantee the reliable communications of the primary user (PU), we impose a joint constraints on both average and peak interference power. With multiple relays available, the performance for proactive decode-and-forward (DF) relaying is investigated in underlay cognitive relay networks. Particularly, considering the correlation among the received signal to noise ratios (SNRs), exact...
In this paper, we investigate the performance of adaptive modulation in spectrum sharing cognitive relay networks, where the secondary user (SU) transmits the message by one best relay with amplify and forward (AF) relaying scheme. Moreover, to guarantee the primary user (PU)'s transmission quality, the interferences caused by the SU transmitter and the selected relay are less than a predetermined...
In cooperative wireless networks, relay selection plays a significant role in the system performance. In this paper, with the presence of interferences, we firstly propose two relay selection protocols according to the forms of the interferences. Then considering that the interference caused by the selected relay has an effect on other transmissions, a threshold based relay selection protocol is proposed...
In cooperative wireless networks, it is often the case that multi-source and multi-relay cooperate to transmit their own data to the destination, namely, the access point. For the cooperative systems, the choice of relay and the allocation of power between the source and the relay are important design issues. In this paper, based on the optimal power allocation between one source and one relay under...
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