cfe (NGMV Control Toolbox)

NGMV Control Toolbox

cfe

Common factor extraction for continuous-time polynomials

Syntax

```
[A0,B0,D,D0] = cfe(A,B)
```

Description

The function extracts the common factor D of the continuous-time polynomials A and B, and converts it to the stable form D0. A0 and B0 are the resulting coprime polynomials. This function may be used before a spectral factorization routine.

Example

Say and . Then:

a = conv([1 2],[1 -3]);

b = conv([1 1],[1 -3]);

[a0,b0,d,d0] = cfe(a,b)

a0 =

     1     2

b0 =

     1     1

d =

     1    -3

d0 =

     1     3

See Also

dcfe

adjpol dcfe