More about Sampling - Revision history

Baldwin.britton: /* Aliasing */

2007-11-12T18:37:50Z

Aliasing

← Older revision		Revision as of 11:37, 12 November 2007
Line 13:		Line 13:
	Script for Matlab:		Script for Matlab:
	clear all;		clear all;

	t=0:.01:1;		t=0:.01:1;

	T=0.20;		T=0.20;

	ts=0:T:1;		ts=0:T:1;

	f1=2;		f1=2;

	f2=1/0.125;		f2=1/0.125;

	plot(t,cos(2pif2t),'b-',ts,cos(2pif1ts),'r',t,cos(2pif1t),'y-');		plot(t,cos(2pif2t),'b-',ts,cos(2pif1ts),'r',t,cos(2pif1t),'y-');

	plot(ts,cos(2pif1ts),'r',t,cos(2pif1*t),'y-');		plot(ts,cos(2pif1ts),'r',t,cos(2pif1*t),'y-');

Baldwin.britton: /* Aliasing */

2007-11-12T18:37:29Z

Aliasing

← Older revision		Revision as of 11:37, 12 November 2007
Line 9:		Line 9:

	Like we can see in this images, the samples that we are getting out of the yellow wave, can be also samples in the blue one.		Like we can see in this images, the samples that we are getting out of the yellow wave, can be also samples in the blue one.


			Script for Matlab:
			clear all;
			t=0:.01:1;
			T=0.20;
			ts=0:T:1;
			f1=2;
			f2=1/0.125;
			plot(t,cos(2pif2t),'b-',ts,cos(2pif1ts),'r',t,cos(2pif1t),'y-');
			plot(ts,cos(2pif1ts),'r',t,cos(2pif1*t),'y-');

Baldwin.britton at 00:30, 5 November 2007

2007-11-05T00:30:43Z

New page

===Aliasing===

Aliasing is when different continuous signals become indistinguishable when sampled, this might happen when sampling too slow. It can also refer to the distortion that occurs when a signals are sampled and reconstructed as aliases of the original signals.

Here is an example of aliasing:

[[Image:Signals 2hw-11.jpg]]
[[Image:Signals hw-11.jpg]]

Like we can see in this images, the samples that we are getting out of the yellow wave, can be also samples in the blue one.