User contributions for Pridma
Jump to navigation
Jump to search
9 November 2007
- 13:4813:48, 9 November 2007 diff hist +1,704 N Mark's Homework New page: ==Problem== Sample <math>sin(2 \pi t)</math> at 3Hz and take the DFT. Explain the results. ==MATLAB script== <pre> clear all; close all; f = 1; %sine wave frequency fs = 3; %sample frequ...
- 13:4313:43, 9 November 2007 diff hist 0 N File:DFT20071109Fig4.png No edit summary current
- 13:4313:43, 9 November 2007 diff hist 0 N File:DFT20071109Fig3.png No edit summary current
- 13:4313:43, 9 November 2007 diff hist 0 N File:DFT20071109Fig2.png No edit summary current
- 13:4313:43, 9 November 2007 diff hist 0 N File:DFT20071109Fig1.png No edit summary current
- 13:3513:35, 9 November 2007 diff hist +38 User:Pridma →Homework
8 November 2007
- 18:3918:39, 8 November 2007 diff hist +4 Mark's Article on the DFT →The DFT current
- 18:3918:39, 8 November 2007 diff hist +2,528 N Mark's Article on the DFT New page: ==The DFT== The ''Discrete Fourier Transform'', or ''DFT'' for short, is the Fourier Transform in the discrete world. It is almost exactly like the Fourier Transform. ===MATLAB script=== ...
- 18:1618:16, 8 November 2007 diff hist +71 N File:DFT20071108Fig4.png The actual Fourier transform of a sample signal for describing the DFT. current
- 18:1518:15, 8 November 2007 diff hist +46 N File:DFT20071108Fig3.png The shifted FFT signal for describing the DFT. current
- 18:1518:15, 8 November 2007 diff hist +48 N File:DFT20071108Fig2.png The unshifted FFT signal for describing the DFT. current
- 18:1518:15, 8 November 2007 diff hist +51 N File:DFT20071108Fig1.png The original sampled signal for describing the DFT. current
- 18:1018:10, 8 November 2007 diff hist +44 User:Pridma →Homework
- 16:1016:10, 8 November 2007 diff hist +1,725 N Mark's Article on Aliasing New page: ==Aliasing== Aliasing is the problem you get if you ignore Nyquist's theorem that says you must sample at least twice the fastest frequency. ===MATLAB script=== <pre> clf; f = 3; %sine ...
- 16:0016:00, 8 November 2007 diff hist +48 N File:Alias11082007fig1.png Figure generated by MATLAB which shows aliasing. current
- 15:3015:30, 8 November 2007 diff hist +45 User:Pridma →Homework
25 October 2007
- 22:1622:16, 25 October 2007 diff hist +1,336 N Mark's Article on Sampling No edit summary current
11 October 2007
- 20:2920:29, 11 October 2007 diff hist 0 Pridma's Article on Fourier Transforms →Useful Applications current
- 20:1820:18, 11 October 2007 diff hist −1 Pridma's Article on Fourier Transforms No edit summary
- 20:1620:16, 11 October 2007 diff hist +26 Pridma's Article on Fourier Transforms →Useful Applications