Questions tagged [reconstruction]
139 questions
2
votes
1 answer
Computing sine phase and amplitude
I need to compute the DC offset, amplitude, and phase of a sine wave and I would like some help validating that my current technique is correct and get some tips to improve my technique. I am a DSP noob.
I have a signal that is sampled at 100 kHz…
thndrwrks
- 121
- 5
1
vote
0 answers
Image reconstruction from k-space data
I have k-space data related to an image. k-space data is made of Kx, Ky, signal arrays of 4100x1. What I have done for image reconstruction is:
$$I_{m,n}=\sum_i Signal_i \space e^{2\pi j(\frac{K_{x}^i \space m}{4100} + \frac{K_{y}^i \space…
strahd
- 159
- 1
- 6
0
votes
0 answers
2D IFFT implementation
I have a problem where I need to obtain 2D IFFT of a $81\times64$ signal. However, if we denote the reconstructed image $I_{m,n}$, its coordinates will be $M\times N$ but the k-space signal is sampled in a different fashion such as…
strahd
- 159
- 1
- 6
0
votes
2 answers
Ideal reconstruction after down sampling
The signal $x_a(t) = \cos(2\pi450t)$ is sampled.
F = 450
Fs = 1000 Hz
f = F/Fs = 450/1000 // Sampling theorem is fulfilled
x(n) = cos(2*pi*(450/1000))
The signal is then down sampled with a factor 3.
fNew = f*3 = 450*3/1000 = 1.35
xNew(n) =…
user264230
- 105
- 1