Hottest Questions This Month

18

votes

9

answers

1k

views

Efficient Magnitude Comparison for Complex Numbers

modified Jan 20 at 14:14 Dan Boschen 13.8k

12

votes

5

answers

3k

views

Is a notch filter for 50 Hz without delay possible?

filter-design delay

answered Jan 13 at 10:38 Livius 121

3

votes

5

answers

1k

views

A question about sampling rate of cosine signal

sampling frequency nyquist cosine

modified 2 days ago John_Ha 31

3

votes

3

answers

536

views

Why are anticausal systems even defined?

causality

answered Jan 18 at 18:05 TimWescott 1,148

5

votes

2

answers

397

views

Why do we integrate the modulating function in FM?

modulation frequency-modulation

modified Dec 31 '19 at 21:40 Jason R 22.1k

3

votes

3

answers

703

views

Spectral Leakage in layman's terms

fourier-transform dft

answered yesterday earlevel 114

7

votes

3

answers

215

views

Best Approach to Rank Complex Magnitude Comparision Problem

algorithms numerical-algorithms

modified Jan 16 at 4:36 Dan Boschen 13.8k

1

vote

3

answers

223

views

Sawtooth wave Fourier coefficients

signal-analysis fourier-transform fourier

answered Jan 7 at 0:47 TimWescott 1,148

5

votes

3

answers

123

views

why should I scale the fft using 1/N?

fft scaling

answered Jan 4 at 19:02 Cedron Dawg 4,828

2

votes

2

answers

201

views

Phase difference between signals sampled at different frequencies

fft discrete-signals sampling phase

modified Jan 15 at 20:58 Dan Boschen 13.8k

1

vote

1

answer

155

views

Does mixing brown noise and white noise create pink noise?

filters noise lowpass-filter

modified Jan 4 at 12:34 Hilmar 13.2k

0

votes

2

answers

116

views

Fourier coefficients of |A cos (x)|

fourier-transform fourier fourier-series

modified Jan 2 at 21:20 Elena Martini 99

1

vote

1

answer

71

views

How do I convert a sampled complex signal to a real signal?

sampling hilbert-transform

modified 2 days ago watkipet 115

0

votes

2

answers

88

views

IQ signal FM descrimination using phase derivative

demodulation frequency-modulation quadrature octave

modified Jan 7 at 17:31 axk 175

0

votes

1

answer

180

views

The selection of the amplitude of the signal, consisting of rectangular pulses, at different frequencies

filters signal-analysis frequency algorithms digital

modified Jan 6 at 13:27 Dan Boschen 13.8k

5

votes

1

answer

101

views

Use of Tukey window and its effect on a graph

fft window

modified Jan 21 at 9:08 Gideon Genadi Kogan 212

1

vote

2

answers

78

views

anti-alias filter of square pulses

sampling nyquist square

answered Jan 2 at 18:05 TimWescott 1,148

0

votes

1

answer

75

views

Question about zeroes of simple 2nd order FIR filter

filters fir

modified Jan 5 at 1:59 DamienBradley 153

1

vote

5

answers

73

views

Interpreting the amplitude of signals in fourier transform

fft signal-analysis fourier-transform

answered Dec 30 '19 at 20:43 Laurent Duval 20.4k

3

votes

1

answer

73

views

Obtain I/Q Components from a Real Signal On the Fly - Hilbert Transform or Digital Downconversion?

hilbert-transform sdr quadrature analytic-signal

modified yesterday Dan Boschen 13.8k

2

votes

1

answer

87

views

Frequency response of a system given its block diagram

fourier-transform linear-systems frequency-response

answered Jan 11 at 22:07 Dan Boschen 13.8k

0

votes

3

answers

64

views

confusion sampling vs quantization?

image-processing sampling quantization adc

modified Jan 14 at 17:13 earlevel 114

0

votes

1

answer

49

views

Negative frequency of a sinusoidal wave on the magnitude spectrum: Physical explanation?

frequency-spectrum

answered Jan 19 at 20:04 GKH 467

0

votes

1

answer

100

views

Scaling a wavelet in continuous wavelet transform

frequency-spectrum wavelet gaussian time-frequency

modified Jan 15 at 16:04 Cedron Dawg 4,828

2

votes

2

answers

59

views

Response of an ideal integrator to a cosine wave

fourier-transform linear-systems laplace-transform

modified Jan 15 at 10:52 Matt L. 58k

0

votes

2

answers

71

views

Draw a structure for IIR Filter given H(z)

filters infinite-impulse-response transfer-function

modified Jan 14 at 19:36 earlevel 114

0

votes

1

answer

50

views

How do I normalize a predesigned IIR filter?

infinite-impulse-response normalization

answered 2 days ago Matt L. 58k

1

vote

2

answers

49

views

Cross-correlation of maximum length sequence with noise

linear-systems impulse-response

modified Jan 21 at 3:56 Dan Boschen 13.8k

3

votes

2

answers

38

views

Lightweight test for bimodal distributions?

statistics histogram

answered 4 hours ago TimWescott 1,148

2

votes

2

answers

48

views

Where does the error come from in PID control?

control-systems

answered Jan 6 at 9:12 Yiftah 51

2

votes

2

answers

47

views

Why is the carrier suppressed by AM-DSB-SC modulation?

fft frequency-spectrum modulation radio amplitude-modulation

modified Dec 27 '19 at 19:14 Matt L. 58k

1

vote

1

answer

60

views

Fourier coefficients of odd and even part of a signal

fourier-transform fourier fourier-series

modified Jan 18 at 18:48 GKH 467

3

votes

1

answer

58

views

I Q sampling and baseband version of analytic signal

sdr quadrature analytic-signal derivation

modified Jan 20 at 14:54 Matt L. 58k

1

vote

2

answers

57

views

FFT Phase interpretation of input signal with non-integer number of cycles in FFT window

fft discrete-signals phase

modified Jan 9 at 10:28 Cedron Dawg 4,828

2

votes

1

answer

55

views

What did I do wrong with this simple filter build?

filters discrete-signals lowpass-filter laplace-transform c++

answered Jan 5 at 21:37 Matt L. 58k

3

votes

1

answer

70

views

Fourier coefficients of 1/(1+it)

fourier-transform fourier fourier-series

modified Jan 19 at 18:09 Laurent Duval 20.4k

0

votes

1

answer

53

views

Converting a discrete real time domain to a discrete complex time domain signal

quadrature time-domain

modified Dec 28 '19 at 14:54 Dan Boschen 13.8k

0

votes

3

answers

86

views

3D model from high speed videos?

image-processing computer-vision radar

answered Jan 8 at 11:02 A_A 8,389

1

vote

1

answer

51

views

Frequency response of FM modulation/demodulation chain with phase derivative demodulation

phase frequency-response frequency-modulation octave derivative

modified Jan 6 at 19:58 Dan Boschen 13.8k

0

votes

1

answer

78

views

Which (Fourier transform?) processing method to use for time variant audio processing? (newbie)

fft audio

answered Jan 7 at 23:00 robert bristow-johnson 12.8k

0

votes

1

answer

77

views

Is there any science to explain the “weight” or “3D depth” of hardware audio vs software that some people claim?

audio

answered Jan 12 at 15:25 Knut Inge 19

0

votes

1

answer

59

views

Correct way of zero padding in time domain

zero-padding

modified Jan 20 at 8:11 jomegaA 5

3

votes

1

answer

44

views

Given 1 recording of my voice, how can I process it to sound like 2 independent recordings of my voice played in unison?

signal-analysis audio phase speech-processing stft

answered Dec 30 '19 at 16:55 Hilmar 13.2k

0

votes

1

answer

43

views

FIR Linear Phase Condition

filters phase fir frequency-response linear-phase

modified Jan 13 at 15:40 Matt L. 58k

0

votes

4

answers

55

views

Sequence expansion by zeros and interpolation - does it insert additional frequencies?

interpolation

modified 11 hours ago user7216373 1

-1

votes

1

answer

42

views

How convert Given DBFS into DB in iOS?

audio audio-processing

answered Jan 8 at 16:11 endolith 12.7k

0

votes

1

answer

42

views

Complex time domain signals and QAM

complex quadrature time-domain

answered Jan 10 at 20:50 Marcus Müller 14.5k

1

vote

4

answers

68

views

How to detect overlapping peaks in FFT?

fft peak-detection

modified Jan 16 at 13:30 DamienBradley 153

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