Journal ArticleDOI
Multiple antenna spectrum sensing in cognitive radios
TLDR
The simulation results provide the available traded-off in using multiple antenna techniques for spectrum sensing and illustrates the robustness of the proposed GLR detectors compared to the traditional energy detector when there is some uncertainty in the given noise variance.Abstract:
In this paper, we consider the problem of spectrum sensing by using multiple antenna in cognitive radios when the noise and the primary user signal are assumed as independent complex zero-mean Gaussian random signals. The optimal multiple antenna spectrum sensing detector needs to know the channel gains, noise variance, and primary user signal variance. In practice some or all of these parameters may be unknown, so we derive the generalized likelihood ratio (GLR) detectors under these circumstances. The proposed GLR detector, in which all the parameters are unknown, is a blind and invariant detector with a low computational complexity. We also analytically compute the missed detection and false alarm probabilities for the proposed GLR detectors. The simulation results provide the available traded-off in using multiple antenna techniques for spectrum sensing and illustrates the robustness of the proposed GLR detectors compared to the traditional energy detector when there is some uncertainty in the given noise variance.read more
Citations
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Journal ArticleDOI
Multiple Antennas Spectrum Sensing for Cognitive Radio Networks
Yang Ou,Yi-Ming Wang +1 more
TL;DR: Results indicate that the proposed antenna weighting and selection algorithm can be able to optimize network performance.
Proceedings ArticleDOI
Blind detection methods in cognitive radio — An overview and comparison
TL;DR: An overview and comparison of chosen blind detection methods proposed for use in CR receivers are provided, and the methods are compared in terms of detection efficiency, time complexity and robustness to changes in transmission parameters.
Proceedings ArticleDOI
Secure robust collaborative spectrum sensing in the presence of smart attackers
TL;DR: The provided closed-form analytical results show that the proposed detector outperforms significantly the similar secure spectrum sensing schemes.
Management and Sensing of Spectrum in Cognitive Radio
TL;DR: This thesis determines the conditions, in terms of channel gains and network geometry, under which such cooperation leads to an increase in rate, or a reduction in power and bandwidth usage, and proposes cooperative protocols that use these results to enhance spectrum efficiency.
Proceedings ArticleDOI
A parallel spectrum sensing technique for cognitive radio
TL;DR: The simulation results, in terms of detection probability, confirm that the projected parallel sensing scheme beats current sensing schemes and requires minor observation time.
References
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Journal ArticleDOI
Cognitive radio: brain-empowered wireless communications
TL;DR: Following the discussion of interference temperature as a new metric for the quantification and management of interference, the paper addresses three fundamental cognitive tasks: radio-scene analysis, channel-state estimation and predictive modeling, and the emergent behavior of cognitive radio.
Proceedings Article
Wireless communications
TL;DR: This book aims to provide a chronology of key events and individuals involved in the development of microelectronics technology over the past 50 years and some of the individuals involved have been identified and named.
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Detection of signals by information theoretic criteria
Mati Wax,Thomas Kailath +1 more
TL;DR: Simulation results that illustrate the performance of the new method for the detection of the number of signals received by a sensor array are presented.
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