Journal
IEEE SIGNAL PROCESSING LETTERS
Volume 17, Issue 4, Pages 359-362Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LSP.2010.2041581
Keywords
Cognitive radios; cooperative sensing; hard decisions; selection procedures; spectrum sensing
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Funding
- Finnish Funding Agency for Technology and Innovation (TEKES)
- Grants-in-Aid for Scientific Research [22760266] Funding Source: KAKEN
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In cooperative spectrum sensing, information from several cognitive radios (CRs) is used for detecting the primary user. To reduce sensing overhead and total energy consumption, it is recommended to cooperate only with the CRs that have the best detection performance. However, the problem is that it is not known a priori which of the CRs have the best detection performance. In this letter, we are proposing three methods for selecting the CRs with the best detection performance based only on hard (binary) local decisions from the CRs. Simulations are used to evaluate and compare the methods. The results indicate that the proposed CR selection methods are able to offer significant gains in terms of system performance.
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