Sampling from a frequency-domain perspective: continuous frequency spectrum

Oversampled [Graphics:../Images/index_gr_70.gif]

Sampling frequency 
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Frequency domain representation of signal 
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Time-domain representation of signal 
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Frequency spectrum of sampled signal 
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Ideal filter 
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Sampled, filtered spectrum 
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Ideally reconstructed signal 
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Undersampled [Graphics:../Images/index_gr_98.gif]

Sampling frequency 
[Graphics:../Images/index_gr_99.gif]
Frequency domain representation of signal 
[Graphics:../Images/index_gr_100.gif]
[Graphics:../Images/index_gr_101.gif]

[Graphics:../Images/index_gr_102.gif]

Time-domain representation of signal 
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Frequency spectrum of sampled signal 
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Ideal filter 
[Graphics:../Images/index_gr_113.gif]
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Sampled, filtered spectrum 
[Graphics:../Images/index_gr_116.gif]
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Ideally reconstructed signal 
[Graphics:../Images/index_gr_119.gif]
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Converted by Mathematica      February 3, 2003