When the delay lines are only 1 sample long, a standard state-space
- The matrix
is the state transition
- The vector
- The state vector
completely determines the state of the
system at time .
- The length of the state vector
order of the linear system.
When the delay-lines are not unit length, the state-space description
of an FDN expands in a simple way.
Matlab includes many tools for state-space analysis and simulation,
especially in the Control Systems Tool Box.