ABSTRACT

Measurement Model: y(k) = CX(k)

• Estimate X(0) = [x1(0), …, xn(0)]′ from the output measurements {y(0), y(l), …, y(n − l)}, thus as seen below:

y(0) = CX(0)

y(1) = CX(1) = CΦX(0)

y(2) = CX(2) = CΦ2X(0)

y

y

y n

C

C

C n

( ) ( )

( )

0 1

1 1 −

=

− − − −

− − − −

− −

Φ

Φ ⎥

x

x

xn

0 0

( ) ( )

( )

(8.1)

where we define:

ʹ

=

− − − −

− − − −

− −

H

C

C

C n

Φ

Φ

and

X( )

( ) ( )

( )

0 0

2 =

x

x

xn

• If H0 is invertible, it is possible to find X(0).