User`s guide

FIR Rate Conversion
5-209
Diagnostics An error is generated if the relation between K and L shown above is not
satisfied.
(Input port width)/(Output port width) must equal the
(Decimation factor)/(Interpolation factor).
A warning is generated if L and K are not relatively prime; that is, if the ratio
L/K can be reduced to a ratio of smaller integers.
Warning: Integer conversion factors are not relatively prime in
block 'modelname/FIR Rate Conversion (Frame)'. Converting ratio
L/M to l/m.
The block scales the ratio to be relatively prime, and continues the simulation.
Dialog Box
Interpolation factor
The integer factor, L, by which to upsample the signal before filtering.
FIR filter coefficients
The FIR filter coefficients, in descending powers of z.
Decimation factor
The integer factor, K, by which to downsample the signal after filtering.
References Fliege, N. J. Multirate Digital Signal Processing: Multirate Systems, Filter
Banks, Wavelets. West Sussex, England: John Wiley & Sons, 1994.