Filter Design HDL Coder™

DALUTPartition

Specify number and size of LUT partitions for distributed arithmetic architecture

Settings

[p1 p2...pN]

Where [p1 p2 p3...pN] is a vector of N integers, divides the LUT used in distributed arithmetic (DA) into N partitions. Each vector element specifies the size of a partition. The maximum size for an individual partition is 12. The sum of all vector elements must be equal to the filter length. The filter length is calculated differently depending on the filter type (see Distributed Arithmetic for FIR Filters).

Usage Notes

To enable generation of DA code for your filter design without LUT partitioning, specify a vector of one element, whose value is equal to the filter length, as in the following example:

fdes = fdesign.lowpass('N,Fc,Ap,Ast',4,0.4,0.05,0.03,'linear');
Hd = design(fdse);
Hd.arithmetic = 'fixed';
generatehdl (Hd, 'DALUTPartition', 5);

See Distributed Arithmetic for FIR Filters for a complete description of DA.

See Also

DARadix

CoeffPrefix

DARadix