Digital filter combination for interpolation
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United States of America Patent
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Jul 29, 2008
Grant Date -
N/A
app pub date -
Dec 4, 1997
filing date -
Dec 5, 1996
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Abstract
A digital filter combination for interpolating primary sample values of a sampled signal using an mth-order discrete-time filter and a kth-order continuous time interpolation filter, with m.gtoreq.3 and k.gtoreq.2, wherein the discrete-time filter forms n secondary sample values from at least m+1 primary sample values at equal time intervals, with n.gtoreq.m, and the continuous-time interpolation filter forms from at least part of the n secondary sample values an interpolated value whose temporal position with respect to that of the primary sample values is predeterminable by a normalized interpolating instant dp=t.sub.in/T, where t.sub.in is the absolute interpolating instant, and T is the period of the primary sampling rate.
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