design_filter

Table of Contents

• Synopsis
• Options

Synopsis

design_filter [input file0] -o [output file] [-h ] [-forder int] [-double ] [-o ofile]

designfilter computes the coefficients of a FIR filter with a given frequency response. The user supplies the frequency response as a vector of evenly spaced gains ranging from 0 to half the sampling frequency. The length of this vector must be a power of 2. The filter coefficients can be used by the sigfilter program.

Options

• -h: Options help

• -forder: int Order of FIR filter. This must be ODD. Sensible values range from 19 (quick but with a shallow rolloff) to 199 (slow but with a steep rolloff). The default is 199.

• -double: Design a filter suitable for double (zero-phase) filtering

• -o: ofile output filter file