Distributed boundary estimation for spectrum sensing in cognitive radio networks
Tay, Wee Peng
Li, Kwok Hung
Date of Issue2014
School of Electrical and Electronic Engineering
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.
DRNTU::Engineering::Electrical and electronic engineering::Wireless communication systems
IEEE Journal on Selected Areas in Communications
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