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Signaalitöötluse alused I (LOFY.01.018)
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Antud on graafik signaalist: kitsas impulsilaadne piik ajas tähendab...
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Signaal x(t) = cos(5t). Leia Fourier' pööre.
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Leia Fourier' pööre signaalil x(t)=2cos(4t)+3sin(2t). Vastus on:
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Graafikaülesanne: antud on amplituudispekter |X(ω)|, mis koosneb kahest piigist ω=±6. Milline on vastav ajasignaal?
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Lorentzi funktsioon (Lorentzian) üldkujul L(ω) = 1/(1 + ((ω-ω₀)/γ)²) iseloomustab
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Lorentzi funktsioon kirjeldab hästi
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Lorentzi ja Gaussi funktsiooni peamine erinevus on, et Lorentzi funktsioon
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Aja nihutamine x(t - t₀) põhjustab sagedusesituses
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Antud on signaal: x(t) = u(t) - u(t-3). Mis on selle Fourier' pööre?
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Leia Fourier' pööre: x(t) = e^(-2|t|). X(ω) =
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