期刊
PHYSICS LETTERS A
卷 382, 期 12, 页码 806-810出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.physleta.2018.01.015
关键词
Generalized energy detector; Vibrational resonance; Normalized asymptotic efficacy; Fisher information; Non-Gaussian noise
资金
- National Natural Science Foundation (NNSF) of China [61573202]
In this paper, the generalized energy (GE) detector is investigated for detecting weak random signals via vibrational resonance (VR). By artificially injecting the high-frequency sinusoidal interferences into an array of GE statistics formed for the detector, we show that the normalized asymptotic efficacy can be maximized when the interference intensity takes an appropriate non-zero value. It is demonstrated that the normalized asymptotic efficacy of the dead-zone-limiter detector, aided by the VR mechanism, outperforms that of the GE detector without the help of high-frequency interferences. Moreover, the maximum normalized asymptotic efficacy of dead-zone-limiter detectors can approach a quarter of the second-order Fisher information for a wide range of non-Gaussian noise types. (C) 2018 Elsevier B.V. All rights reserved.
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