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Distributed Boundary Estimation for Spectrum Sensing in Cognitive Radio Networks.
- Source :
- IEEE Journal on Selected Areas in Communications; Nov2014, Vol. 32 Issue 11, p1961-1973, 13p
- Publication Year :
- 2014
-
Abstract
- In a cognitive radio network, a primary user (PU) shares its spectrum with secondary users (SUs) temporally and spatially, while allowing for some interference. We consider the problem of estimating the no-talk region of the PU, i.e., the region outside which SUs may utilize the PU's spectrum regardless of whether the PU is transmitting or not. We propose a distributed boundary estimation algorithm that allows SUs to estimate the boundary of the no-talk region collaboratively through message passing between SUs, and analyze the trade-offs between estimation error, communication cost, setup complexity, throughput and robustness. Simulations suggest that our proposed scheme has better estimation performance and communication cost trade-off compared to several other alternative benchmark methods, and is more robust to SU sensing errors, except when compared to the least squares support vector machine approach, which however incurs a much higher communication cost. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 07338716
- Volume :
- 32
- Issue :
- 11
- Database :
- Complementary Index
- Journal :
- IEEE Journal on Selected Areas in Communications
- Publication Type :
- Academic Journal
- Accession number :
- 100055175
- Full Text :
- https://doi.org/10.1109/JSAC.2014.1411RP08