Defines filter symmetry.

Unit
OptimalFir

TFilterSymmetry = (fsmPositive, fsmNegative);

Define the filter symmetry, positive or negative. Positive symmetry is defined as h[-i] = h[i] and negative symmetry as h[-i] = -h[i], where h is centered around zero. Filters with negative symmetry shift the phase by 90 degrees across all frequencies.

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