Hottest Questions This Month

4

votes

3

answers

1k

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Fourier transform of given signal

fourier-transform

modified Feb 7 at 13:31 Ahmad Bazzi 426

5

votes

3

answers

204

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Deconvolution of Synthetic 1D Signals - How To?

modified Feb 8 at 9:34 Royi 6,881

4

votes

4

answers

243

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Estimators for improved spectral subtraction of noise

dft estimation denoising noise-cancellation

modified Feb 7 at 9:44 Olli Niemitalo 8,173

4

votes

2

answers

422

views

Fourier Transform with both Time Delay and Frequency Shift

fourier-transform time-frequency

modified Feb 5 at 20:36 robert bristow-johnson 10.8k

5

votes

2

answers

87

views

For complex values, why use complex conjugate in convolution?

filters convolution adaptive-filters complex wiener-filter

modified Feb 12 at 0:06 robert bristow-johnson 10.8k

4

votes

2

answers

107

views

Is the Sobel filter a high pass filter, and if not, what is the difference between them?

image-processing edge-detection highpass-filter

modified Feb 1 at 10:05 Fat32 15.3k

3

votes

2

answers

120

views

Can $\delta(t+\infty)$ be a legitimate signal?

linear-systems proof

modified Feb 13 at 0:03 Fat32 15.3k

2

votes

2

answers

93

views

Why does a higher sampling frequency mess up my bandpass filter?

filters python bandpass nyquist scipy

answered Jan 23 at 14:40 endolith 10.3k

3

votes

2

answers

82

views

Why do waveforms that are symmetrical above and below their horizontal centerlines contain no even-numbered harmonics?

fourier-series wave

modified Feb 12 at 6:13 Olli Niemitalo 8,173

2

votes

1

answer

54

views

Proving that the IDTFT is the inverse of the DTFT?

fourier-transform dft dtft

answered Feb 12 at 8:16 Matt L. 50.6k

1

vote

2

answers

143

views

A question on Fourier Series and the frequency of the sinusoids

fourier-transform continuous-signals fourier-series

modified Feb 4 at 4:55 Curiosity 43

3

votes

2

answers

63

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Support of the convolution of two rectangular signals

convolution dtft

modified Feb 11 at 16:01 Rodrigo de Azevedo 617

0

votes

2

answers

79

views

What is the basic idea behind Fourier transform? [closed]

fourier-transform fourier fourier-series

modified Jan 21 at 18:09 nbro 106

1

vote

2

answers

99

views

Solving a Linear Mean-Square Estimation the easy way

estimation self-study least-squares

modified Feb 3 at 16:14 Fat32 15.3k

1

vote

1

answer

73

views

How is frequency related to data rate?

frequency-spectrum frequency modulation bandwidth frequency-modulation

answered Feb 5 at 20:57 Marcus Müller 12k

5

votes

1

answer

70

views

What type of low-pass filter to use for gyroscope filtering in control application?

lowpass-filter filtering sensor

modified Feb 11 at 4:17 Rodrigo de Azevedo 617

2

votes

1

answer

69

views

Comparing multiple signals for similarity

fft signal-analysis python cross-correlation time-series

answered Jan 23 at 9:50 A_A 7,539

1

vote

2

answers

53

views

What is the meaning of positive and negative shift in signal correlation?

cross-correlation

answered Feb 3 at 8:46 Matt L. 50.6k

0

votes

2

answers

67

views

Differential Equations applications in Signal Processing [closed]

math

modified Jan 30 at 15:22 Stanley Pawlukiewicz 6,256

-1

votes

4

answers

91

views

What are real-valued and complex signals and why is the Fourier transform of a real-valued signal Hermitian?

frequency-spectrum frequency complex

modified Feb 7 at 2:04 anpar 815

2

votes

1

answer

69

views

Definition of DSP Terms

audio sampling hrtf

modified Feb 12 at 12:01 Marcus Müller 12k

0

votes

1

answer

67

views

Highest rate achievable by current DSP and A/D chips?

adaptive-filters performance

modified Feb 4 at 21:20 zip 1

0

votes

1

answer

52

views

Extremely low frequency filters

digital-filters

modified Jan 31 at 1:34 robert bristow-johnson 10.8k

1

vote

1

answer

80

views

Light Detection and Ranging (LIDAR) Range Bias Compensation with Light Dependent Resistor (LDR)

noise radar lidar

modified Jan 25 at 6:46 A_A 7,539

1

vote

1

answer

77

views

How can I improve my fit of cosines to periodic data using Python?

python fourier-series periodic periodogram

modified Feb 4 at 16:53 Cedron Dawg 2,948

3

votes

1

answer

95

views

Example of non-equivalence of the two PSD definitions

power-spectral-density statistics spectrum-estimation

modified 3 hours ago Dilip Sarwate 13.1k

0

votes

2

answers

57

views

About using Walsh matrix as spreading sequence

digital-communications autocorrelation spread-spectrum

modified yesterday BlackMath 359

-2

votes

1

answer

34

views

Covariance matrix for sine wave extraction [closed]

matlab

answered Jan 25 at 13:22 Cedron Dawg 2,948

3

votes

1

answer

70

views

Why is this recursive DFT algorithm not equivalent to this iterative method?

matlab fft dft

modified Jan 30 at 21:33 darkpbj 126

1

vote

1

answer

68

views

Can Temperature data be predicted using adaptive filter using LMS algorithm?

discrete-signals adaptive-filters linear-prediction lms

modified Jan 22 at 20:24 Zia 8

1

vote

1

answer

82

views

How to get the background noise of microphone?

correlation

modified Feb 7 at 8:25 Shivani Kshatriya 6

1

vote

1

answer

81

views

Hilbert Transform in C provides possibly strange results

hilbert-transform c

modified Jan 22 at 11:59 Matt L. 50.6k

0

votes

1

answer

63

views

Can a software defined radio with a frequency range of 300 MHz – 3.8 GHz detect AM (535 to 1705 KHz) and FM signals (88 to 108 MHz)?

gnuradio radio software-defined-radio

modified Feb 6 at 21:53 Fat32 15.3k

2

votes

1

answer

60

views

Simulate time series given temporal auto-correlation functions

autocorrelation time-series random-process

modified Feb 6 at 8:04 anpar 815

1

vote

1

answer

36

views

DFT conjugate of $X^[k]$, how to prove its formula in terms of $x^[n]$?

dft

answered Jan 25 at 9:42 Fat32 15.3k

0

votes

2

answers

76

views

Algorithms for detecting the difference between two signals

discrete-signals signal-analysis

modified Feb 9 at 20:38 james2018 11

1

vote

2

answers

46

views

Wavelet is a small wave, what is problem with using sin(x) of one cycle?

wavelet

modified Feb 3 at 17:02 hotpaw2 25.8k

0

votes

2

answers

44

views

Why Coherence is not a valid metric when performing impact excitation?

signal-analysis fourier-transform coherence

answered 2 days ago Konstantin Beliaev 1

0

votes

1

answer

44

views

How to get a heartbeat signal from this data?

filters discrete-signals fourier-transform dct

modified Feb 11 at 21:19 Stanley Pawlukiewicz 6,256

1

vote

1

answer

34

views

DFT zero-padding of signals starting before n=0

dft zero-padding

answered Jan 28 at 23:49 Fat32 15.3k

1

vote

1

answer

53

views

Why do DFT frequency buckets need to be divided by sample period?

matlab fft dft

answered Jan 24 at 19:30 Cedron Dawg 2,948

1

vote

1

answer

53

views

Do Nyquist samples have the same sum as the integral of the signal?

nyquist

modified Feb 10 at 17:33 Matt L. 50.6k

1

vote

1

answer

41

views

How do I find the transfer function in the frequency domain?

fourier-transform transfer-function

answered Jan 28 at 17:15 Ill-Conditioned Matrix 366

0

votes

1

answer

41

views

Confusion about ensembles and averages in autocorrelation matrices

matlab autocorrelation

modified Feb 5 at 15:01 Mr.Sh4nnon 70

1

vote

2

answers

66

views

Nyquist sampling

discrete-signals sampling computer-vision nyquist electrical-signal

modified Feb 9 at 15:09 Hilmar 10.1k

1

vote

2

answers

40

views

What is the duration of the spreading sequence

digital-communications spread-spectrum

answered Jan 27 at 6:19 Zeyad_Zeyad 643

1

vote

2

answers

51

views

Spatial Audio (Ambisonic) and calculating sound source position

audio

modified 2 days ago okarpov 106

0

votes

1

answer

50

views

Detrend data with no clear secular trend prior to Fourier analysis?

fft fourier time-series

answered Jan 25 at 15:02 Stanley Pawlukiewicz 6,256

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