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SIGNAL PLAYBACK DEVICE AND SIGNAL PLAYBACK METHOD

Foreign code F130007551
File No. S2012-0233-N0
Posted date Jul 16, 2013
Country WIPO
International application number 2012JP008042
International publication number WO 2013/094172
Date of international filing Dec 17, 2012
Date of international publication Jun 27, 2013
Priority data
  • P2011-282505 (Dec 23, 2011) JP
Title SIGNAL PLAYBACK DEVICE AND SIGNAL PLAYBACK METHOD
Abstract

[Problem] To enable precise reproduction of a weak signal contained in an input signal without requiring N independent noise sources or applying noise to N input signals. [Solution] The invention is a signal playback device that, given an input signal superimposing noise on a weak signal that is transmission information, plays the weak signal by means of stochastic resonance. Said signal reproduction device comprises: nonlinear elements (NL1 to NLN) that input N (N is a natural number equal to 2 or more) received signals (R) branched to N branch lines (L1 to LN), and output nonlinear output signals (NLO1 to NLON)

N delay elements (D1 to DN) that delay the nonlinear output signals by mutually different amounts of time

and a combiner (10) that combines delay signals (DS1 to DSn) output by the delay elements (D1 to DN). The correlation among noise components contained in the delay signals (DS1 to DSn) that delay the nonlinear output signals is extremely small, and the correlation of the weak signal is large. In a combined delay signal (DA), a noise component is removed, and the weak signal is amplified.

  • Applicant
  • ※All designated countries except for US in the data before July 2012
  • NATIONAL UNIVERSITY CORPORATION HOKKAIDO UNIVERSITY
  • Inventor
  • KASAI, SEIYA,
  • TADOKORO, YUKIHIRO,
  • ICHIKI, AKIHISA
IPC(International Patent Classification)
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