Filter Design Toolbox

issos

Test whether quantized filters are composed of second-order sections

Syntax

• flag = issos(hq)
  

Description

flag = issos(hq) determines whether quantized filter hq consists of second-order sections. Returns 1 if all sections of quantized filter hq have order less than or equal to two, and 0 otherwise.

Examples

• warning off
  [b,a] = butter(5,.5);
  hq = sos(qfilt('ref',{b,a}));
  v = issos(hq)
  v =
  
       1
  hq.statespersection
  
  ans =
  
       1     2     2
  

Quantized filter hq is in second-order section form.

See Also
isallpass, isfir, islinphase, ismaxphase, isminphase, isreal, isstable

isreal

isstable