ASN11 - Leakage demonstration in Octave - Revision history

Jodi.Hodge at 23:21, 21 December 2009

2009-12-21T23:21:56Z

← Older revision		Revision as of 16:21, 21 December 2009
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	x= dft(y,t); %function x is continous		x= dft(y,t); %function x is continous





	Example octave script with leakage		Example octave script with leakage

2009-12-21T23:21:33Z

← Older revision		Revision as of 16:21, 21 December 2009
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	fs=1500		fs=1500

	t=[1:20]/fs;		t=[1:20]/fs; %is multiple of the period 1/fs

	y=sin(2pit);		y=sin(2pit);

	x= dft(y);		x= dft(y,t); %function x is continous

	Example octave script with leakage		Example octave script with leakage
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	fs=1500		fs=1500

	t=[1:20]/fs;		t=[1:20]/500; %does not include whole periods

	y=sin(2pit);		y=sin(2pit);

	x= dft(y);		x= dft(y,t); %function x is not continuous and demonstrates leakage

2009-12-21T23:17:41Z

← Older revision		Revision as of 16:17, 21 December 2009
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	[[Jodi Hodge\|Back to my home page]]		[[Jodi Hodge\|Back to my home page]]

	Leakage occurs when the Discrete Fourier Transform (DFT) is applied to a signal whose range is not a multiple of the total period.		Leakage occurs when the Discrete Fourier Transform (DFT) is applied to a signal whose range is not a multiple of the total period. The DFT function assumes that the signal is periodic it when it repeats the function should be periodic. If the sample range is not a multiple of the period them when the DFT repeat the function will have disctonuity at the restarting point.
	The DFT function assumes that the signal is periodic.



	~~example~~ octave script no leakage		Example octave script no leakage

	fs=1500		fs=1500
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	x= dft(y);		x= dft(y);

	~~example~~ octave script no leakage		Example octave script with leakage

	fs=1500		fs=1500

2009-12-21T23:14:16Z

← Older revision		Revision as of 16:14, 21 December 2009
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	Leakage occurs when the Discrete Fourier Transform (DFT) is applied to a signal whose range is not a multiple of the total period.		Leakage occurs when the Discrete Fourier Transform (DFT) is applied to a signal whose range is not a multiple of the total period.
	The DFT function assumes that the signal is periodic.		The DFT function assumes that the signal is periodic.



			example octave script no leakage

			fs=1500

			t=[1:20]/fs;

			y=sin(2pit);

			x= dft(y);

			example octave script no leakage

			fs=1500

			t=[1:20]/fs;

			y=sin(2pit);

			x= dft(y);

2009-12-21T18:55:41Z

← Older revision		Revision as of 11:55, 21 December 2009
Line 1:		Line 1:
	[[Jodi Hodge\|Back to my home page]]		[[Jodi Hodge\|Back to my home page]]

			Leakage occurs when the Discrete Fourier Transform (DFT) is applied to a signal whose range is not a multiple of the total period.
	~~Leakage demonstration in Octave~~		The DFT function assumes that the signal is periodic.

2009-12-18T04:49:46Z

← Older revision		Revision as of 21:49, 17 December 2009
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			[[Jodi Hodge\|Back to my home page]]


	Leakage demonstration in Octave		Leakage demonstration in Octave

2009-12-01T18:26:33Z

New page: Leakage demonstration in Octave

New page

Leakage demonstration in Octave