The approximation tag has no wiki summary.
1
vote
1answer
38 views
Signal approximation using linear combination of functions
How I can approximate the signal $x(t)=0.001\,t^3 \exp(-0.1t)$ in the interval $[0,100]$ using a linear combination of the following functions:
$f_1(t)=A_1$
$f_2(t)=A_2\cos(0.05t)$
...
3
votes
2answers
121 views
Using continuous verses discrete wavelet transform in digital applications
I am familiar with much of the mathematical background behind wavelets. However when implementing algorithms on a computer with wavelets I am less certain about whether I should be using continuous or ...
1
vote
1answer
72 views
Establishing the function of a decaying signal
I have a set of samples from a signal. The signal is erratic in behaviour at the beginning but then it settles down and oscillates around the value of 100 (the frequency of oscillation is not ...
2
votes
1answer
154 views
Approximating pixel location in scale space
I'm implementing a scale-space with o octaves and s scale levels in each octave.
Each octave is half the size the previous.
I have keypoints found in each octave, I need to approximate the real ...
7
votes
2answers
294 views
Estimate Taylor series coefficients from samples of a function
Say I have measurements of a function $y = y(x)$, sampled at $x_i$ with some noise, that could be approximated by a Taylor series expansion. Is there an accepted way of estimating the coefficients for ...
12
votes
3answers
829 views
What is the best first-order IIR approximation to a moving average filter?
Assume the first order IIR Filter:
$ y[n] = \alpha x[n] + (1 - \alpha) y[n - 1] $
How can I choose the parameter $ \alpha $ s.t. the IIR approximates as good as possible the FIR which is the ...
