Results 231 to 240 of about 861,138 (294)
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The application of chaotic oscillators to weak signal detection
IEEE Transactions on Industrial Electronics, 1999In this paper, the authors introduce a signal detection scheme based on the bifurcation behavior of the driven Duffing oscillator. Chaotic systems are sensitive to certain signals and immune to noise at the same time, the properties of which demonstrate their potential application in weak signal detection. Starting from the analysis of the intermittent
Guanyu Wang
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On the detectability of weak signals
IEEE Trans. Inf. Theory, 2020Approximate performance results are obtained for optimal detection of weak discrete time signals. The analysis parallels the ''locally optimum'' approach for detector design and is based on a small-signal Taylor series approximation to the Chernoff error probability bounds.
John S. Sadowsky, James A. Bucklew
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Nonlinear resonance decomposition for weak signal detection
Review of Scientific Instruments, 2021This paper attempts to investigate the behaviors of coupling stochastic resonance (CSR) subject to α-stable noise and a periodic signal by using the residence-time ratio. Then, a nonlinear resonance decomposition is designed to successfully enhance and detect weak unknown multi-frequency signals embedded in strong α-stable noise by decomposing the ...
Zijian Qiao +4 more
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On Weak Signal Detection With Compressive Measurements
IEEE Signal Processing Letters, 2018The problem of weak signal detection in Gaussian noise is addressed in the Neyman–Pearson framework with compressive measurements. A locally optimum detector is first devised assuming that the signal is nonsparse by approximating the test statistic around zero using a Taylor series, which is a good estimate only in a small radius around zero.
Kyatsandra G. Nagananda +1 more
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Estimation and detection of weak optical signals
IEEE Transactions on Information Theory, 1972In this paper we consider the problem of estimation and detection of Weak optical signals formulated as a problem in point process theory. Indeed at very low light intensity the only information available from an intensity detector is the random distribution of time instants \{t_i \} at which photons of the field are absorbed and photoelectrons emitted.
Odile Macchi, Bernard C. Picinbono
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Scenario Model for Weak Signal Detection
2011 Seventh International Conference on Signal Image Technology & Internet-Based Systems, 2011Due to multiplication of information sources as blogs or social networks, watchers have to deal with data in different formats and structures. Consequently, an adapted system, helpful for business intelligence activities, able to retrieve and process data from the Web, is required.
Emilien Bondu +4 more
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Ultrafast Detection Of Weak Signals
SPIE Proceedings, 1988ABSTRACT Femtosecond nonlinear detection techniques for weak signals are discussed. New methods for the characterization of femtosecond sig nals, in amplitude and phase, are presented. 1. INTRODUCTION Several nonlinear detection techniques have been developed with the passively mode- locked dye laser as a source, using the com bination of Rh6G as ...
J. C. Diels, N. Jamasbi, C. Yan, M. Lai
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Exploiting vibrational resonance in weak-signal detection
Physical Review E, 2017In this paper, we investigate the first exploitation of the vibrational resonance (VR) effect to detect weak signals in the presence of strong background noise. By injecting a series of sinusoidal interference signals of the same amplitude but with different frequencies into a generalized correlation detector, we show that the detection probability can
Ren, Yuhao +4 more
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