Paper Info
Title
Joint optimal sensing and power allocation for cooperative relay in cognitive radio networks
Abstract
In this paper, we investigate the joint optimization of sensing and power allocation for cooperative relay in cognitive radio networks (CRNs). Specifically, in the sensing time slot, the source secondary user (SU) and the relay SUs individually sense the channel, and then the relay SUs send their sensing results to the source SU, in which a fusion rule is employed to determine whether the primary user (PU) is idle or not on the channel. In the data transmission slot, the selective amplify-and-forward (S-AF) cooperative relay scheme is considered to assist the source SU for data transmission. By jointly considering the two slots, the optimization problems are respectively formulated to maximize the CRN's average throughput and minimize the outage probability of secondary transmission under the average transmit power constraint of SUs and the average interference power constraint of PU. The optimal algorithms are developed to acquire the optimal sensing time and power allocation. Moreover, in the S-AF scheme, a relay selection scheme is also considered in the optimization problem. Finally, we provide simulation results to validate our proposed algorithms.
Year
DOI
Venue
2012
10.1109/ICC.2012.6363718
ICC
Keywords
Field
DocType
s-af scheme,optimisation,relays,data transmission slot,radiofrequency interference,average interference power constraint,cooperative communication,cognitive radio,pu,average transmit power constraint,cognitive radio network,selective amplify-and-forward cooperative relay selection scheme,optimization problem,wireless channels,joint optimal sensing,outage probability,primary user,power allocation,crn,source secondary user,su,fusion rule,amplify and forward communication,sensor fusion,probability,signal to noise ratio,sensors,throughput,interference
Relay channel,Transmitter power output,Data transmission,Computer science,Computer network,Communication channel,Throughput,Optimization problem,Relay,Cognitive radio
Conference
Volume
Issue
ISSN
null
null
1550-3607 E-ISBN : 978-1-4577-2051-2
ISBN
Citations 
PageRank 
978-1-4577-2051-2
13
0.59
References 
Authors
12
3
Name
Order
Citations
PageRank
Huogen Yu1804.75
Wanbin Tang213819.42
Shaoqian Li32276195.05