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1.5 Resampling with rational factor

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Describes the process of resampling, or sample-rate conversion.

Interpolation by L and decimation by M can be combined to change the effective sampling rate of a signal by the rational factor L M . This process is called resampling or sample-rate conversion . Rather than cascading an anti-imaging filter for interpolation with an anti-aliasingfilter for decimation, we implement one filter with the minimum of the two cutoffs L M and the multiplication of the two DC gains ( L and 1 ), as illustrated in .
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Source:  OpenStax, Digital signal processing (ohio state ee700). OpenStax CNX. Jan 22, 2004 Download for free at http://cnx.org/content/col10144/1.8
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