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Performance of collaborative spectrum sensing for cognitive radio in the presence of Gaussian channel estimation errors
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Chen, Yunfei and Beaulieu, Norman C. (2009) Performance of collaborative spectrum sensing for cognitive radio in the presence of Gaussian channel estimation errors. IEEE Transactions on Communications, Vol.57 (No.7). pp. 1944-1947. doi:10.1109/TCOMM.2009.07.070166 ISSN 0090-6778.
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Official URL: http://dx.doi.org/10.1109/TCOMM.2009.07.070166
Abstract
The performance of collaborative spectrum sensing for cognitive radio in a lognormal shadowing and Rayleigh fading channel is investigated. Unlike previous works that assume perfect knowledge of the average channel signal-to-noise ratio, this paper considers the realistic case where estimation of the average channel signal-to-noise ratio has error. Furthermore, while previous works have designed and examined estimators based on assuming that the channel samples used in the average signal-to-noise ratio estimators are noiseless, the present work assumes that the channel samples are noisy, as is the case in practical systems. Numerical results show that the probability of missed opportunity decreases as the estimation error decreases, as expected. Perhaps unexpectedly, the results also show that in the presence of noise, there exists a threshold phenomenon for the noise level. Below a particular threshold, the probability of missed opportunity increases as the noise level increases. Yet above this threshold, the probability of missed opportunity decreases as the noise level increases.
Item Type: | Journal Article | ||||
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Subjects: | T Technology > TK Electrical engineering. Electronics Nuclear engineering | ||||
Divisions: | Faculty of Science, Engineering and Medicine > Engineering > Engineering | ||||
Library of Congress Subject Headings (LCSH): | Cognitive radio networks, Estimation theory | ||||
Journal or Publication Title: | IEEE Transactions on Communications | ||||
Publisher: | IEEE | ||||
ISSN: | 0090-6778 | ||||
Official Date: | July 2009 | ||||
Dates: |
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Volume: | Vol.57 | ||||
Number: | No.7 | ||||
Number of Pages: | 4 | ||||
Page Range: | pp. 1944-1947 | ||||
DOI: | 10.1109/TCOMM.2009.07.070166 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Restricted or Subscription Access | ||||
Date of first compliant deposit: | 13 December 2015 | ||||
Version or Related Resource: | Paper presented in part at: IEEE Wireless Communications and Networking Conference, Budapest, Hungary, 05-08 Apr 2009. | ||||
Conference Paper Type: | Paper | ||||
Type of Event: | Conference |
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