Hottest Questions This Month

5

votes

4

answers

2k

views

Why can't quantization noise be zero?

analog-to-digital

modified 4 hours ago lennon310 3,480

5

votes

2

answers

213

views

Nyquist frequency isn't working

answered Jul 1 at 15:36 OverLordGoldDragon 2,029

1

vote

4

answers

298

views

Can we have an analogous sampling theorem for quantization?

sampling analog-to-digital quantization

answered Jul 5 at 17:01 hotpaw2 32.4k

3

votes

1

answer

395

views

Deblurring 1D Data Using Direct Inverse Filtering

fourier-transform filtering deconvolution inverse 1d

modified Jul 19 at 14:24 Royi 23.6k

3

votes

2

answers

106

views

What is a “pitch period”?

audio speech-processing pitch periodic fundamental-frequency

modified Jul 13 at 21:33 robert bristow-johnson 15.6k

3

votes

2

answers

168

views

Shannon capacity limit & FEC comparisons

modulation bpsk channelcoding information-theory forward-error-correction

modified Jul 18 at 6:45 EdC 11

2

votes

2

answers

119

views

How does the scale of a wavelet relate to the Fourier frequency (or period) under CWT?

discrete-signals wavelet time-frequency cwt

modified 2 days ago OverLordGoldDragon 2,029

2

votes

5

answers

150

views

Setting the duration of subcarriers in OFDM system

signal-analysis digital-communications ofdm

modified Jul 19 at 13:53 Zeyad_Zeyad 1,052

2

votes

3

answers

116

views

What is a simple method, if any, to calculate a variable IIR filter for audio effects in real time?

filters filter-design finite-impulse-response infinite-impulse-response

answered 2 days ago John Moser 121

2

votes

2

answers

72

views

Convolution between a channel with real signal vs. channel with complex signal

discrete-signals digital-communications convolution

modified Jul 2 at 12:28 Dan Boschen 26.9k

1

vote

2

answers

113

views

Generate the Matrix Form of 1D Convolution Kernel

convolution deconvolution optimization linear-algebra numerical-algorithms

modified Jul 19 at 14:13 Royi 23.6k

3

votes

1

answer

108

views

The power of signal processing when faced with hardware constraints

noise algorithms signal-detection interference hardware

modified Jul 23 at 23:23 Hilmar 23.8k

-2

votes

2

answers

82

views

DFT modulus property?

discrete-signals fourier-transform dft

modified Jun 29 at 22:46 Dan Boschen 26.9k

0

votes

1

answer

143

views

Complex damped exponential signal with repetitive poles and the significance of falling factorial

discrete-signals poles-zeros complex damping

modified Jul 16 at 2:32 robert bristow-johnson 15.6k

4

votes

2

answers

81

views

How to demodulate PM with signal faster than carrier?

phase demodulation

modified Jul 13 at 11:59 Dan Boschen 26.9k

0

votes

1

answer

48

views

Can FFT tells us existance of same frequencies with different phases?

fourier-transform phase fourier amplitude array-signal-processing

answered Jul 16 at 4:57 robert bristow-johnson 15.6k

3

votes

1

answer

74

views

Estimate and Track the Amplitude, Frequency and Phase of a Sine Signal Using a Kalman Filter

matlab estimation kalman-filters tracking bayesian-estimation

modified yesterday Royi 23.6k

2

votes

2

answers

74

views

Invertible low-pass (Butterworth) filter in python (scipy)?

filters python lowpass-filter scipy

modified Jul 6 at 16:18 fermionicsignal 23

1

vote

1

answer

84

views

Representing a digital ramp function in terms of unit step function

discrete-signals unit-shift

modified Jul 16 at 8:49 Matt L. 74.6k

1

vote

3

answers

104

views

How is a constellation diagram constructed in practice?

discrete-signals continuous-signals

modified Jul 4 at 2:28 Dan Boschen 26.9k

2

votes

1

answer

56

views

Why aren't the integrator and the differentiator inverse systems?

convolution linear-systems time-domain

modified Jun 30 at 7:16 Rodrigo de Azevedo 759

1

vote

2

answers

97

views

Projection Matrix derivation to constrained optimization problem with Lagrange multiplier

optimization least-squares projection

modified Jul 8 at 12:11 Osman Coskun 13

0

votes

1

answer

44

views

How to calculate the total time delay of a first order linear filter on a signal?

lowpass-filter phase

answered Jul 16 at 12:14 Hilmar 23.8k

3

votes

1

answer

90

views

Modern Method for 1D Signal Segmentation

signal-analysis machine-learning segmentation unsupervised-learning

modified Jul 10 at 12:09 Royi 23.6k

3

votes

1

answer

112

views

Sound activated recording and advanced filtering on Raspberry Pi

filters audio python filtering audio-processing

modified Jul 7 at 9:52 Thomas 103

1

vote

1

answer

64

views

FM demodulation using complex differentiation

finite-impulse-response digital-filters demodulation group-delay finite-differences

modified Jul 7 at 13:34 Matt L. 74.6k

0

votes

0

answers

103

views

Space-Time Finite Element and Static Condensation for Sensor Fusion

filters kalman-filters optimization sensor

asked Jul 20 at 9:51 Emil 1

2

votes

2

answers

103

views

ELI5: How do biquad filters like bandpass “know” the frequency of a signal?

frequency biquad

modified Jul 12 at 12:19 Dan Boschen 26.9k

0

votes

1

answer

62

views

How to find a system without an input $x[n]$ is linear or non linear

discrete-signals signal-analysis linear-systems non-linear

modified Jul 4 at 20:52 Fat32 25.1k

2

votes

3

answers

48

views

What does the intensity values on wavelet transform mean? Amplitude or power?

fourier-transform power-spectral-density wavelet array-signal-processing discrete-wavelet-transform

modified Jul 19 at 18:19 Laurent Duval 27.2k

1

vote

1

answer

60

views

Difference between MSK and GMSK?

modulation gmsk

modified Jul 7 at 13:12 Dan Boschen 26.9k

2

votes

2

answers

68

views

Specify minimum trigger frequency for recording audio in Python

audio python frequency

modified Jul 15 at 17:51 lennon310 3,480

2

votes

1

answer

41

views

Chirp zero crossings

audio chirp

modified Jul 20 at 21:53 robert bristow-johnson 15.6k

0

votes

1

answer

49

views

Resampling pitch shifter

pitch aliasing resampling

modified Jul 2 at 4:13 hotpaw2 32.4k

1

vote

2

answers

60

views

Error correction code with code rate 3/4

forward-error-correction

answered Jun 28 at 14:09 TimWescott 4,971

1

vote

2

answers

36

views

When applying analog and digital effects on an audio signal is it better to start with a clean digital signal or use the analog effects before ADC?

filters audio digital-filters analog-to-digital digital-to-analog

answered Jul 21 at 20:00 robert bristow-johnson 15.6k

2

votes

1

answer

46

views

excluding the value of some frequency in a Fourier Transform

fft ifft

answered Jul 21 at 10:41 Laurent Duval 27.2k

0

votes

2

answers

75

views

Create a time signal with a known magnitude response

fft discrete-signals frequency-spectrum

modified Jul 9 at 21:03 Spark123 5

0

votes

2

answers

45

views

IIR Filter Stability

filter-design infinite-impulse-response digital-filters highpass-filter stability

modified Jul 5 at 16:46 hotpaw2 32.4k

0

votes

1

answer

35

views

Arbitrary phase FIR filter design

finite-impulse-response digital-filters linear-phase

answered Jun 27 at 21:14 Hilmar 23.8k

2

votes

0

answers

72

views

Extracting audio segments based on detected onsets using libROSA

audio peak-detection segmentation

asked Jul 12 at 17:48 VGF 39

0

votes

2

answers

56

views

Is there a way to convert audio to a list of frequencies preserving the temporal position?

fft audio

answered Jul 14 at 11:00 Shivalnu 58

-1

votes

2

answers

56

views

Decimation: how to preserve frequency content that lie above half the decimated sampling frequency?

filters multirate

answered Jul 12 at 12:48 David 2,481

3

votes

1

answer

43

views

Different formulations of Chebyshev II resulting in different poles?

matlab filter-design analog chebyshev-filters

answered Jul 23 at 2:49 dmedine 153

1

vote

1

answer

43

views

DSP: newbie not understanding z transform/complex sinusoidal frequency and phase

frequency phase z-transform

answered Jul 7 at 4:50 TimWescott 4,971

1

vote

2

answers

69

views

How do I detune an audio sample by 1 hertz up or down from a copy of it

sampling java

modified 7 hours ago JRE 2,057

0

votes

3

answers

68

views

Noise variance estimation under known channel

estimation homework

answered Jul 3 at 16:11 Marcus Müller 22.3k

1

vote

2

answers

41

views

Why does the volume increase when I reduce the gain of an all-pass filter connected in series?

audio allpass reverb

answered Jul 11 at 7:55 Hilmar 23.8k

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