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- W2893735824 abstract "We consider the problem of detecting the presence of signal in a rank-one signal-plus-noise data matrix. In case the signal-to-noise ratio is under the threshold below which a reliable detection is impossible, we propose a hypothesis test based on the linear spectral statistics of the data matrix. The error of the proposed test is optimal as it matches the error of the likelihood ratio test that minimizes the sum of the Type-I and Type-II errors. The test is data-driven and does not depend on the distribution of the signal or the noise. If the density of the noise is known, it can be further improved by an entrywise transformation of the data matrix to lower the error of the test. As an intermediate step, we establish a central limit theorem for the linear spectral statistics of general rank-one spiked Wigner matrices." @default.
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- W2893735824 date "2018-09-28" @default.
- W2893735824 modified "2023-09-25" @default.
- W2893735824 title "Weak detection of signal in the spiked Wigner model" @default.
- W2893735824 hasPublicationYear "2018" @default.
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