期刊
PHYSICS LETTERS A
卷 344, 期 6, 页码 401-410出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.physleta.2005.06.113
关键词
bistable receiver; short-time stochastic resonance; frequency-shift keying; receiver response speed
A series of short-time stochastic resonance (SR) phenomena, realized in a bistable receiver, can be utilized to detect a train of information represented by signals that adopt frequency-shift keying (FSK). It is demonstrated that the values of noise intensity at resonance regions are close for adjacent periodic signals with an appropriate frequency separation. This establishes the possibility of decoding subthreshold or slightly suprathreshold M-ary FSK signals in bistable receivers. Furthermore, the mechanism of FSK signal detection via short-time SR effects is elucidated in terms of the receiver response speed. This phenomenon provides a possible mechanism for information processing in a bistable device operating in nonstationary noisy environments, where even the inputs appear over a short timescale or have a frequency shift. (c) 2005 Elsevier B.V. All rights reserved.
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