Multiple antenna spectrum sensing in cognitive radios
Citations
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259 citations
Cites background or methods from "Multiple antenna spectrum sensing i..."
...GLRT detectors have been proposed for multiantenna systems in [19] and for sensing OFDM signals in [20,21] by taking some of the system parameters, such as channel gains, noise variance, and PU signal variance as the unknown parameters....
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...In the GLRT, the unknown parameters are determined by the maximum likelihood estimates (MLE) [19-21]....
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238 citations
209 citations
Additional excerpts
...[119], [124] and SLE-based [116], [125], [126]....
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181 citations
Cites background from "Multiple antenna spectrum sensing i..."
...In [7], [8], it is shown that reliability of spectrum sensing can be improved in the CR by using multiple antennas....
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References
12,172 citations
"Multiple antenna spectrum sensing i..." refers background in this paper
...One proposal for alleviating the spectrum scarcity is allowing licence-exempted Secondary Users (SU) to exploit the unused spectrum holes over some frequency ranges by using Cognitive Radio (CR) technology [2]....
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7,826 citations
"Multiple antenna spectrum sensing i..." refers background in this paper
...Multiple antenna techniques currently are used in communications and their effectiveness have been shown in different aspects [16]....
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3,341 citations
"Multiple antenna spectrum sensing i..." refers background in this paper
...Under both H0 and H1 hypotheses, the ratio of λmax σ2 n is greater than one with high probability [23] and hence we can simplify the GLR detector as the following form:...
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...Under hypothesis H1, we have the following lemma for the distribution of the largest eigenvalue: Lemma 2: Under hypothesis H1, the largest eigenvalue, λ1, of a sample matrix has the normal distribution as follows [23]:...
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