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Interpolated Filter ) ^5 E+ w6 c. N5 e5 e
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A previous section explained that an IFIR filter is similar to a conventional FIR, but with the unit delay operator replaced by k-1 units of delay. k is referred to as the zero-packing factor. One way to realize this substitution is by the insertion of k-1 zeros between the coefficient values of a prototype filter. When specifying an IFIR architecture, the full set of prototype coefficients is supplied in the coefficient file, without the zeros implied by the zero-packing factor. The zero-packing factor is defined through the filter user inteRFace. For example, consider the filter coefficient data in the .coe file shown in Figure 3-48.+ @, ^" o8 | p; s2 Z+ t& k
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发表于 2019-6-17 11:10
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