Hottest Questions This Week

1

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2

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81

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Transfer functions for Scipy and Matlab's Butterworth filter don't seem to match theory

modified Jun 19 at 5:43 Juha P 522

0

votes

2

answers

36

views

GNURadio signal degradation above Nyquist rate

sampling gnuradio

answered Jun 17 at 16:23 TimWescott 4,741

0

votes

4

answers

76

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Linear Phase Filters and FFT

fft convolution symmetry

modified 2 days ago Dan Boschen 26.3k

0

votes

1

answer

72

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Why do we use the DFT instead of the DTFS? Or, why was the FFT algorithm built for the DFT instead of the DTFS?

fourier fourier-series

answered 2 days ago Hilmar 23k

0

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2

answers

66

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What is the importance of obtaining a linear signal?

linear-systems electrical-signal

modified Jun 18 at 19:09 hotpaw2 32.3k

0

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1

answer

49

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Why is z (and not ω) the variable of interest for discrete time systems?

discrete-signals signal-analysis finite-impulse-response digital-filters analog-to-digital

modified Jun 17 at 4:08 Dan Boschen 26.3k

0

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2

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47

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Impulse response of linear interpolation in discrete time

matlab interpolation

answered Jun 17 at 18:17 robert bristow-johnson 15.4k

1

vote

1

answer

68

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Estimating the SNR of respiration signal

power-spectral-density snr signal-power

modified 16 hours ago Gloi 13

0

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2

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51

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Can we use Gardner timing error detector for multi level QAM or OFDM systems?

matlab discrete-signals digital-communications sampling

modified 17 hours ago Dan Boschen 26.3k

0

votes

2

answers

46

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Why does my amplitude change upon inverse Fourier Transform when I am only randomizing the phase of the fourier transform using Python numpy?

fft fourier-transform python time-series array-signal-processing

answered Jun 19 at 18:45 TimWescott 4,741

0

votes

2

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59

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signal processing techniques for accurate phase measurement

phase

modified yesterday Dan Boschen 26.3k

1

vote

2

answers

45

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Matlab Pade approximation influence on bode plot and step response

matlab control-systems delay

answered Jun 17 at 14:59 Ben 3,155

0

votes

1

answer

30

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Does the RMS value of a signal yields its root-power?

signal-analysis signal-power

modified Jun 17 at 16:07 Hilmar 23k

0

votes

1

answer

47

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Karplus-Strong with Jaffe-Smith sample rate-independent

audio frequency signal-synthesis tone-generation

modified yesterday hotpaw2 32.3k

-1

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2

answers

34

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Can beamforming be created by transmitting same signal with different phase

beamforming mimo

modified Jun 19 at 13:19 Marcus Müller 22k

0

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1

answer

47

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Downsampling( decimation) theory: additional frequency

digital-communications downsampling

modified yesterday Dan Boschen 26.3k

0

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2

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36

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Butterworth filter higher order

filters butterworth

modified 2 days ago robert bristow-johnson 15.4k

0

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1

answer

28

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Why Bluetooth 2 use pi/4-DQPSK instead of OQPSK?

digital-communications power-spectral-density phase modulation qpsk

answered Jun 17 at 1:02 Dan Boschen 26.3k

0

votes

2

answers

46

views

Frequency response of discrete time system involving interpolation and resampling

discrete-signals frequency-response interpolation resampling

modified 21 hours ago Dan Boschen 26.3k

1

vote

0

answers

43

views

Fisher Information Matrix for sinusoidal signal under multiplicative noise

signal-detection statistics parameter-estimation maximum-likelihood-estimation

modified Jun 19 at 22:29 Ahwaq 31

1

vote

1

answer

43

views

How to calculate the instantaneous frequency for one specfic signal?

signal-analysis frequency

modified Jun 17 at 5:24 user57947 13

0

votes

2

answers

42

views

How to find the interval peirod from a series of discreate time (numbers)?

time-series

modified Jun 17 at 15:37 Hilmar 23k

0

votes

0

answers

42

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Optimal Combination of received signals from two antenna

signal-analysis digital-communications noise signal-detection

modified Jun 19 at 3:07 zstr 1

2

votes

1

answer

39

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Biorthogonal Windows

window-functions short-time-ft window

modified 8 hours ago OverLordGoldDragon 1,553

1

vote

1

answer

30

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Mixed - Discrete and Continuous system Laplace domain stability - Effect of Sampler and DAC

discrete-signals continuous-signals z-transform control-systems laplace-transform

modified Jun 17 at 13:39 Ben 3,155

0

votes

1

answer

29

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Does resampling to low number of samples lead to loss in high frequency content?

resampling

answered 2 days ago Hilmar 23k

1

vote

1

answer

29

views

Is the Schroeder Allpass implementation in Freeverb incorrect?

filters discrete-signals filter-design allpass reverb

modified yesterday Matt L. 74.3k

0

votes

1

answer

34

views

Mitigating high-frequencies after sampling

fft filter-design sampling window-functions

modified 16 hours ago lennon310 3,460

0

votes

0

answers

32

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Window overlapping FFT

fft spectrogram window-functions

modified Jun 17 at 4:03 hotpaw2 32.3k

2

votes

0

answers

31

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frequency estimation under non-circular complex Gaussian noise

frequency gaussian self-study covariance parameter-estimation

modified 15 hours ago AlexTP 5,225

0

votes

2

answers

24

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Inverse Fourier transform: where am I going wrong?

fourier-transform inverse-problem

modified 4 hours ago Fat32 25k

1

vote

1

answer

30

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Appropriate Gaussian filter parameters when resizing image

image-processing downsampling gaussian-kernel

modified 2 days ago V.V.T 1,312

0

votes

1

answer

29

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how to calculate $H_{lp} = z(1- H_{hp}) $ , given coefficients for $H_{hp}$?

filter-design z-transform transfer-function

modified yesterday Matt L. 74.3k

1

vote

1

answer

21

views

how to normalize DCT (or FFT) coefficients to compare different signals

frequency-spectrum dct normalization

modified Jun 18 at 21:35 OverLordGoldDragon 1,553

1

vote

1

answer

21

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Can Goodness-of-fit increase while noise also increases?

signal-analysis noise statistics signal-synthesis linear-prediction

answered 13 hours ago OverLordGoldDragon 1,553

0

votes

1

answer

21

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Static noise which changes based on which usb port I've audio interface connected to?

noise audio-processing

answered 2 days ago Hilmar 23k

0

votes

1

answer

21

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Can I optimize band-pass FFT filter with skipping values instead of zeroing them when decimating?

fft decimation

modified 40 mins ago Dan Boschen 26.3k

-1

votes

0

answers

26

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What are the different components of a digital communication receiver? Please suggest some reference books to understand this [closed]

digital-communications

modified 19 hours ago Nits r 17

1

vote

1

answer

20

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oQPSK/QPSK conversion with fractional interpolation

interpolation gnuradio qpsk

answered 6 hours ago Dan Boschen 26.3k

0

votes

1

answer

22

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How to find the bandwidth of the transmitted M-FSK signal?

digital-communications qpsk bpsk fsk communication-standard

answered Jun 19 at 7:39 Dan Boschen 26.3k

0

votes

0

answers

21

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Random variation of Bit Error Rate (BER) with increasing SNR for QAM 64 System

discrete-signals digital-communications signal-detection

modified Jun 16 at 20:28 Arin Dutta 11

0

votes

1

answer

20

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Does Sampling frequency come into picture in Samples generation for DAC to generate sinewave (analog signal with particular frequency & amplitude)?

sampling digital-to-analog

answered Jun 17 at 13:36 Hilmar 23k

0

votes

1

answer

17

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Verifying if noise is gaussian in non-time series data

noise gaussian denoising

answered Jun 20 at 2:06 dpdp 93

0

votes

0

answers

16

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How to get an accurate edge value of gaussian scipy

filters python gaussian

asked Jun 19 at 11:58 Alexander Schubert 1

0

votes

0

answers

15

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How to calculate signal to noise ratio (SNR) for videos?

video

13 hours ago ashish14 101

0

votes

0

answers

15

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Output load pull matching in power amplifier to ensure maximum output power

radio electrical-signal

asked Jun 19 at 22:48 ali khalil 41

0

votes

1

answer

15

views

OpenCV: Can't find large rectangle contour

image-processing opencv

answered Jun 16 at 15:29 MimSaad 1,724

0

votes

1

answer

11

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Signal to noise ratio (SNR) of a CW signal

sampling nyquist snr bandwidth analog-to-digital

modified 1 hour ago Dan Boschen 26.3k

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