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28 Answers

Newest Activity Votes
141
Why is the Fourier transform so important?
Aug 19 '11 at 7:50
34
What is the physical significance of negative frequencies?
Oct 15 '11 at 23:26
31
What's the difference between the Hough and Radon transforms?
Oct 21 '11 at 16:48
31
What is meant by “stochastic sampling”?
Aug 20 '11 at 2:17
23
What should be considered when selecting a windowing function when smoothing a time series?
Sep 12 '11 at 23:44
20
What are good ways to detect signal clipping in a recording?
Aug 18 '11 at 20:51
16
Why is $y(n) = x(n) + x(n-1)$ a low pass filter?
Dec 22 '11 at 16:11
16
Are there alternatives to the bilinear transform?
Aug 26 '11 at 3:24
15
What are the proper pre-processing steps to perform Independent Component Analysis?
Aug 23 '11 at 7:45
14
How do I add AWGN to an I and Q representation of a signal?
Aug 18 '11 at 14:21
12
Why does my stop-band filter attenuate other frequencies?
May 5 '12 at 21:18
12
What are the practically relevant differences between various image resampling methods?
Nov 25 '11 at 20:48
12
Detecting Trail in Forest Images
Oct 19 '11 at 17:50
11
How do I detect distinct objects when their edges touch each other?
Dec 5 '11 at 20:23
10
Find circle in noisy data
Nov 7 '12 at 0:05
9
Detecting Arabic verses spanning multiple lines
Apr 14 '12 at 17:12
9
Detecting a fixed template image out of a semi-constant frame of video
Jan 7 '12 at 5:50
8
What is the difference between Remez exchange and Parks-McClellan filter design?
Sep 13 '11 at 22:30
6
What is the relation between the PSDs of filter input and output called? $R_Y = |H|^2R_X$
Sep 20 '11 at 18:31
6
Can ICA be applied, when the number of mixture signal is less than number of source signal?
Sep 7 '11 at 4:55
6
How do I find a system's impulse response from its state-space repersentation using the state transition matrix?
Aug 30 '11 at 20:11
5
Is Ideal LPF BIBO unstable?
Dec 26 '11 at 16:32
5
Why are there comb-like hills in a periodogram?
Nov 26 '11 at 4:14
5
Calculating the PDF of a waveform from its samples
Sep 10 '11 at 0:45
5
What are the advantages, if any, of derivative sampling?
Sep 5 '11 at 4:03
4
What is the most lucid, intuitive explanation for the various FTs - CFT, DFT, DTFT and the Fourier Series?
Nov 14 '11 at 20:42
3
What are the advantages, if any, of derivative sampling?
Aug 27 '11 at 0:47
2
Is it numerically more stable to implement filtering as multiplication or convolution?
Nov 7 '11 at 2:02