| 摘要 |
[Objective] An object is to accurately reproduce a weak signal contained in an input signal without requiring N independent noise sources and without application of noises to N input signals. [Means for Solution] A signal reproduction apparatus reproduces, from an input signal containing a weak signal which is a piece of transmission information and noise superimposed thereon, the weak signal through use of a stochastic resonance phenomenon. The apparatus includes N nonlinear elements NL 1 - NL N (N is a natural number equal to or greater than 2) which receive N reception signals R (split signals) split to N branch lines L 1 - L N , and output nonlinear output signals NLO 1 - NLO N ; N delay elements D 1 - D N which delay the nonlinear output signals by different times, respectively; and a combiner 10 which combines delay signals DS 1 - DS N output from the delay elements D 1 - D N . The correlation among the noise components contained in the delay signals DS 1 - DS N obtained by delaying the nonlinear output signal is extremely small, and the correlation of the weak signal is large. In a delayed combined signal DA, the noise component is removed and the weak signal is amplified. |
