Filter Realizations - Introduction to Digital Signal Processing and Filter Design - page 311

h(2)

h (5)

Σ

h(8)

z − 1

h(7)

X(z)

z − 3 z − 3

h(4)

Σ Σ

h(1)

z − 1

h(6)

h(3)

Σ Σ Y(z)

h(0)

Figure 6.8 Transpose of the polyphase structure shown in Figure 6.7.

X(z)

z − 1 z − 1 z − 1

Σ Σ

Σ

z − 1 z − 1 z − 1

h(0) h(1) h(2) h(3)

Σ Σ Σ Y(z)

Figure 6.9 Direct-form structure of type I linear phase FIR filter function H 3 (z) .