fir2sys Next: Up: sysinterface


Finite impulse response system interface functions

fir2sys (num tsam, inname, outname) Function File
construct a system data structure from FIR description

Inputs

num
vector of coefficients [c0 c1, ..., cn] of the SISO FIR transfer function C(z) = c0 + c1*z^(-1) + c2*z^(-2) + ... + cn*z^(-n)
tsam
sampling time (default: 1)
inname
name of input signal; may be a string or a list with a single entry.
outname
name of output signal; may be a string or a list with a single entry.

Output

sys
system data structure

Example 

          octave:1> sys = fir2sys([1 -1 2 4]0.342,\
          > "A/D input""filter output");
          octave:2> sysout(sys)
          Input(s)
                  1: A/D input
          
          Output(s):
                  1: filter output (discrete)
          
          Sampling interval: 0.342
          transfer function form:
          1*z^3 - 1*z^2 + 2*z^1 + 4
          -------------------------
          1*z^3 + 0*z^2 + 0*z^1 + 0

[c tsam, input, output] = sys2fir (sys) Function File

Extract FIR data from system data structure; see fir2sys for parameter descriptions.