Paper Info
Title
Adaptive dual-radio spectrum-sensing scheme in cognitive radio networks.
Abstract
In this paper, a novel spectrum-sensing scheme, called adaptive dual-radio spectrum-sensing scheme (ADRSS), is proposed for cognitive radio networks. In ADRSS, each secondary user (SU) is equipped with a dual radio. During the data transmission, with the received signal-to-noise ratio of primary user (PU) signal, the SU transmitter (SUT) and the SU receiver (SUR) are selected adaptively to sense one channel by one radio while communicating with each other by the other one. The sensing results of the SUR are sent to the SUT through feedback channels (e.g., ACK). After that, with the sensing results from the SUT or the SUR, the SUT can decide whether the channel switching should be carried out. The theoretical analysis and simulation results indicate that the normalized channel efficiency, defined as the expected ratio of time duration without interference to PUs in data transmission to the whole frame length, can be improved while satisfying the interference constraint to PUs. After that, an enhanced ADRSS is designed by integrating ADRSS with cooperative spectrum sensing, and the performance of ADRSS under imperfect feedback channel is also discussed. Copyright (c) 2011 John Wiley & Sons, Ltd.
Year
DOI
Venue
2013
10.1002/wcm.1178
WIRELESS COMMUNICATIONS & MOBILE COMPUTING
Keywords
Field
DocType
cognitive radio,spectrum sensing,cooperative spectrum sensing,channel efficiency,dual radio,Markov chain
Transmitter,Telecommunications,Normalization (statistics),Data transmission,Computer science,Markov chain,Computer network,Communication channel,Electronic engineering,Interference (wave propagation),Radio spectrum,Cognitive radio
Journal
Volume
Issue
ISSN
13.0
14.0
1530-8669
Citations 
PageRank 
References 
2
0.39
8
Authors
5
Name
Order
Citations
PageRank
Weiwei Wang1808.13
Jun Cai237339.29
Attahiru Sule Alfa351071.89
Anthony C. K. Soong4197274.25
Simin Li520.39