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| パワースペクトル密度推定× | マッチドフィルタ× | |
|---|---|---|
| 分野 | 信号処理 | 信号処理 |
| 系統 | Process / pipeline | Process / pipeline |
| 提唱年≠ | 1967 | 1943 |
| 提唱者≠ | Peter Welch | D. O. North |
| 種類≠ | Frequency domain signal analysis | Optimal filter for signal detection |
| 原典≠ | Welch, P. (1967). The Use of Fast Fourier Transform for Estimation of Power Spectra: A Method Based on Time Averaging over Short, Modified Periodograms. IEEE Transactions on Audio and Electroacoustics, 15(2), 70–73. DOI ↗ | 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 ↗ |
| 別名 | PSD Estimation, Spectral Density Analysis, Power Spectrum Estimation | Correlation Detector, Optimal Filter Detection, Template Matching |
| 関連 | 4 | 4 |
| 概要≠ | Power Spectral Density (PSD) estimation is a set of methods for determining how the power of a signal is distributed across different frequencies. Proposed by Peter Welch in 1967, PSD estimation techniques are fundamental to frequency domain signal analysis, providing insights into the frequency composition of signals for applications ranging from communications to biomedical monitoring. | 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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