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| Butterworth-filterdesign× | Matchad filter× | |
|---|---|---|
| Ämnesområde | Signalbehandling | Signalbehandling |
| Familj | Process / pipeline | Process / pipeline |
| Ursprungsår≠ | 1930 | 1943 |
| Upphovsperson≠ | Stephen Butterworth | D. O. North |
| Typ≠ | Infinite Impulse Response (IIR) filter design | Optimal filter for signal detection |
| Ursprungskälla≠ | Butterworth, S. (1930). On the Theory of Filter Amplifiers. Wireless Engineer and Experimental Wireless, 7, 536–541. link ↗ | North, D. O. (1943). An Analysis of the Factors Which Determine Signal/Noise Discrimination in Pulsed Carrier Systems. RCA Laboratories, Technical Report PTM-946. link ↗ |
| Alias≠ | Butterworth IIR Design, Butterworth Lowpass Filter | Correlation Detector, Optimal Filter Detection, Template Matching |
| Närliggande | 4 | 4 |
| Sammanfattning≠ | The Butterworth filter is a type of signal processing filter designed to have the flattest possible frequency response in the passband while rolling off toward the stopband with a gentle slope. Introduced by Stephen Butterworth in 1930, it has become one of the most widely used filter designs in electrical engineering and digital signal processing due to its predictable and smooth frequency characteristics. | The matched filter is an optimal signal detector that maximizes the signal-to-noise ratio (SNR) for detecting a known signal in additive Gaussian noise. Developed by D. O. North during World War II for radar applications, the matched filter represents the optimal linear filter for signal detection and remains the foundation for detection theory and digital communications. |
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