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Is there any practical application for performing a double Fourier transform? …or an inverse Fourier transform on a time-domain input?

fft signal-analysis fourier-transform hilbert-transform theory

modified 2 hours ago Laurent Duval 18.3k

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1

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how do I derive the system equation for a simple delay with feedback?

filters discrete-signals signal-analysis linear-systems signal-synthesis

answered 6 hours ago Matt L. 53.7k

1

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575

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Apply band pass filter (BPF) before calculating the power of a signal (PSD)?

discrete-signals signal-analysis power-spectral-density bandpass psd

modified 21 hours ago Community♦ 1

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Prove that, in DFT ,interpolation in time domain is equal to replication in frequency domain

discrete-signals signal-analysis dft periodic

modified yesterday robert bristow-johnson 12k

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How to distinguish two types of signals

signal-analysis continuous-signals

modified 2 days ago MBaz 9,340

1

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35

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Why does my sinusoid look “AM” in shape?

matlab signal-analysis sampling interpolation aliasing

modified Aug 22 at 14:47 Laurent Duval 18.3k

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SNR contains $\log N$ term where $N$ stands for number of samples

signal-analysis signal-power signal-energy independence

modified Aug 22 at 13:04 Laurent Duval 18.3k

1

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3

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Help with IQ balance equations?

signal-analysis

modified Aug 22 at 9:02 Community♦ 1

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Improvement of SNR by sampling different number of cycles using FFT of a fixed length singal

fft signal-analysis dsp-core

modified Aug 22 at 7:02 Community♦ 1

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Feature extraction for sound recognition and classification

audio signal-analysis sound signal-detection

answered Aug 21 at 21:36 jsingh 1

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Obtain points in signals which cause correlation

fft signal-analysis python cross-correlation

modified Aug 21 at 12:30 Alexander Denisenko 1

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ACF of $X_t = a + bt$

discrete-signals signal-analysis autocorrelation

modified Aug 20 at 9:17 shani 1

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Calculating impulse response of system

discrete-signals signal-analysis impulse-response

modified Aug 19 at 21:02 Community♦ 1

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How to sketch this multirate system spectrum?

discrete-signals signal-analysis frequency-spectrum filtering downsampling

modified Aug 19 at 17:01 Community♦ 1

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