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14

votes

7

answers

2k

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Fourier transform is an isomorphism…but we don’t get when each frequency appears?

fourier-transform

modified 10 hours ago hotpaw2 29.4k

6

votes

7

answers

2k

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fixed-point floating-point

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3

votes

3

answers

223

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dft self-study

modified 2 hours ago Cedron Dawg 4,285

2

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3

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233

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answered 8 hours ago ShoutOutAndCalculate 113

7

votes

2

answers

106

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fourier-transform convolution

modified 2 days ago Matt L. 56.7k

2

votes

1

answer

89

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Do you really have to always satisfy Nyquist with all signals if your purpose is to reconstruct a signal?

frequency-spectrum nyquist

modified 2 days ago Peter K.♦ 17.8k

4

votes

1

answer

109

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Group Delay for Hilbert Transformer and Resulting Dispersion

phase distortion linear-phase group-delay

modified Dec 8 at 15:41 Dan Boschen 12.1k

1

vote

1

answer

99

views

is y[n] = x[n] + n time invariant?

filters linear-systems

answered Dec 10 at 20:04 Fat32 20k

3

votes

3

answers

62

views

Frequency warping when integrators are replaced with backward-euler and forward-euler integration

control discretization

modified yesterday Dan Boschen 12.1k

2

votes

2

answers

47

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discrete-signals continuous-signals signal-detection radar

answered Dec 11 at 23:50 Envidia 385

2

votes

1

answer

90

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DSSS spread method

spread-spectrum

modified 2 days ago Community♦ 1

0

votes

3

answers

41

views

Is there any algorithm to decompose a wave into a set of given frequencies?

signal-analysis

answered 12 hours ago Cedron Dawg 4,285

1

vote

1

answer

40

views

Is there a relation between the dead zone of sigma delta modulator and filter order?

filters adc delta-sigma

answered Dec 9 at 21:30 TimWescott 758

0

votes

1

answer

51

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NDA timing estimation for mutli-level QAM(RC pulse)

discrete-signals digital-communications synchronization

modified Dec 11 at 3:45 Dan Boschen 12.1k

0

votes

1

answer

43

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When is a discrete time transfer function unrealizable?

filters discrete-signals continuous-signals transfer-function causality

modified yesterday TimWescott 758

0

votes

2

answers

31

views

Phase of the chirp signal

linear-chirp

answered yesterday Dan Boschen 12.1k

2

votes

2

answers

38

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Image resizing and interpolation

image-processing matlab

modified yesterday Fat32 20k

1

vote

1

answer

38

views

How to know basics about convergence

fourier-transform laplace-transform

modified Dec 11 at 0:53 Laurent Duval 19.9k

2

votes

1

answer

38

views

Transfer function given as z-Domain fraction: gain calculation

filters signal-analysis lowpass-filter transfer-function filtering

modified Dec 8 at 10:59 Marcus Müller 14k

0

votes

1

answer

45

views

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signal-analysis fourier-transform sampling nyquist

modified yesterday Dan Boschen 12.1k

2

votes

1

answer

35

views

DPSK vs PSK Error Probability

demodulation bpsk

modified 2 days ago Dilip Sarwate 14.9k

2

votes

0

answers

50

views

Optimal estimation of FIR coefficients

transfer-function estimation least-squares linear-algebra

modified Dec 11 at 5:57 Gideon Genadi Kogan 29

0

votes

0

answers

48

views

What is the electrical equivalent circuit for this interaction? (Is this correct?)

electrical-signal

modified Dec 9 at 3:04 mike 77

2

votes

2

answers

28

views

What is the right way to downsample using Fourier method?

fourier-transform nyquist downsampling aliasing decimation

modified 7 hours ago hotpaw2 29.4k

0

votes

1

answer

26

views

Wireless communications outage

digital-communications information-theory

modified 2 days ago Engineer 707

2

votes

2

answers

26

views

Invertibility of Time-Dependent Fourier Transform

fourier-transform stft dtft

answered Dec 12 at 1:34 TimWescott 758

2

votes

1

answer

22

views

Intuition behind image derivative using Fourier Transform for edges detection

image-processing fourier-transform edge-detection derivative

modified 3 hours ago Dan Boschen 12.1k

2

votes

0

answers

34

views

Getting the right frequency (using FFT)

fourier-transform frequency-spectrum computer-vision

modified Dec 11 at 15:49 Don Draper 121

1

vote

1

answer

26

views

Dummy DSP student request for IDTFT Calculation and Integration Process

math

modified Dec 8 at 13:44 Matt L. 56.7k

0

votes

1

answer

26

views

Scientific names to piano key numbers

conversion

modified 10 hours ago Cedron Dawg 4,285

0

votes

2

answers

20

views

Transforming digitized noisy signal before applying cross-correlation

noise cross-correlation

modified 10 hours ago Dan Boschen 12.1k

0

votes

1

answer

25

views

Number of datapoints after decimation in discrete wavelet wavelet analysis

wavelet transform

modified Dec 11 at 19:19 Laurent Duval 19.9k

0

votes

0

answers

32

views

error probability differential modulation [closed]

digital-communications homework

modified 2 days ago Dan Boschen 12.1k

1

vote

1

answer

32

views

Interpret periods from fourier transfrom graph of periodic impulse signals

fourier-transform

modified Dec 9 at 13:38 Fat32 20k

-2

votes

0

answers

31

views

How to add Gaussian White Noise in Sine Wave Signal? [closed]

noise lowpass-filter

asked Dec 9 at 15:01 Newbie 1

0

votes

1

answer

24

views

ROC of Z Transform of $x(n) = 2(3)^nu(-n)$

z-transform

answered 2 days ago Engineer 707

-2

votes

0

answers

29

views

How can I convert a vector into image? [closed]

image-processing matlab signal-analysis

modified Dec 10 at 19:40 philoopher97 97

0

votes

0

answers

29

views

Ultra low frequency DSP, Earth tide signals [closed]

source-separation

modified Dec 11 at 21:46 Marcus Müller 14k

2

votes

1

answer

29

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SDR spectrum anomalies

power-spectral-density sdr radio

modified yesterday hotpaw2 29.4k

3

votes

0

answers

27

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Block CMA algorithm

discrete-signals digital-communications equalization

asked 2 days ago FourierFlux 317

2

votes

1

answer

27

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How many bps would be required to reproduce the words in speech recognizably?

digital-communications speech

modified yesterday Stanley Pawlukiewicz 8,068

2

votes

1

answer

21

views

Fourier antitransform using scaling property?

fourier-transform

answered 2 days ago Matt L. 56.7k

0

votes

1

answer

18

views

Example of Entropy and Channel Capacity Computation

digital-communications random-process information-theory capacity

answered 2 days ago Matt L. 56.7k

0

votes

1

answer

18

views

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digital-communications

answered Dec 8 at 11:15 Marcus Müller 14k

2

votes

2

answers

14

views

Is it possible to calculate/estimate the storage space a certain duration of .mp4 video files will take up?

video-processing video-compression

answered yesterday Fat32 20k

0

votes

0

answers

22

views

Data Flow Graph Problem [closed]

discrete-signals digital-filters optimization

modified Dec 11 at 14:38 Marcus Müller 14k

-1

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0

answers

21

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Design of second order low pass filter using passive RC components and opamp

filters filter-design lowpass-filter

modified 2 days ago Deepa 1

0

votes

1

answer

16

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Autocorrelation Computation with MATLAB

matlab discrete-signals signal-analysis autocorrelation cross-correlation

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