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- W4310816627 abstract "In many real world oscillatory signals, the fundamental component of a signal f(t) might be weak or does not exist. This makes it difficult to estimate the instantaneous frequency of the signal. A traditional approach is to apply the rectification trick, working with |f(t)| or ReLu(f(t)) instead, to enhance the fundamental component. This raises an interesting question: what type of nonlinear function g:R→R has the property that g(f(t)) has a more pronounced fundamental frequency? g(t)=|t| and g(t)=ReLu(t) seem to work well in practice; we propose a variant of g(t)=1/(1−|t|) and provide a theoretical guarantee. Several simulated signals and real signals are analyzed to demonstrate the performance of the proposed solution." @default.
- W4310816627 created "2022-12-18" @default.
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- W4310816627 date "2023-03-01" @default.
- W4310816627 modified "2023-10-04" @default.
- W4310816627 title "Fundamental component enhancement via adaptive nonlinear activation functions" @default.
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- W4310816627 doi "https://doi.org/10.1016/j.acha.2022.11.007" @default.
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