Name
Abstract | ||
|---|---|---|
In this paper, we first explore a selective cooperation framework for secondary user transmissions in a cognitive radio network with single relay. In the selective cooperation framework, two transmission modes (i.e., relay diversity transmission and non-relay direct transmission) are considered. We study two specific selective cooperation schemes with and without an acknowledgement (ACK) from a cognitive destination as to if it succeeds in decoding or not, called ACK and non-ACK based selective cooperation, respectively. We derive closed-form outage probability expressions for the two schemes with imperfect spectrum sensing, showing that an outage probability floor occurs in high signal-to-noise ratio (SNR) regions due to mutual interference between primary and secondary users. We consider the use of the outage probability floor to generalize the traditional diversity-multiplexing tradeoff (DMT) definition, based on which a DMT analysis is conducted for the non-ACK and ACK based selective cooperation schemes. We then extend the selective cooperation framework to a multiple-relay cognitive radio network considering the best cognitive relay only to participate in assisting secondary transmissions, referred to as the selective best-relay cooperation. We also consider the non-ACK and ACK based selective best-relay cooperation schemes and develop their DMTs by using the generalized DMT definition. |
Year | DOI | Venue |
|---|---|---|
2012 | 10.1109/TCOMM.2012.072612.110180 | IEEE Transactions on Communications |
Keywords | Field | DocType |
generalized dmt definition,cognitive destination,dmt analysis,cooperative diversity,nonack based selective cooperation,multiplexing,outage probability floor,cognitive radio,diversity-multiplexing tradeoff,selective cooperation framework,diversity multiplexing tradeoff definition,signal to noise ratio region,diversity gain,cognitive relay,ack based selective best relay cooperation scheme,mutual interference,selective cooperation,closed form outage probability expression,multiple relay cognitive radio network,secondary transmission,outage probability,secondary user transmission,imperfect spectrum sensing,decoding,fading,sensors | Diversity gain,Cooperative diversity,Fading,Computer science,Computer network,Acknowledgement,Decoding methods,Multiplexing,Relay,Cognitive radio | Journal |
Volume | Issue | ISSN |
60 | 9 | 0090-6778 |
Citations | PageRank | References |
17 | 0.74 | 10 |
Authors | ||
3 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| YuLong Zou | 1 | 1671 | 98.76 |
| Yu-Dong Yao | 2 | 1781 | 119.83 |
| Baoyu Zheng | 3 | 1008 | 82.73 |