9.2.1 Formulation of Parallel FIR using Polyphase Decomposition The input sequence can be decomposed into even-numbered part and odd-numbered part X(2)=0+x21+x222+X323+424+… =(x0+X2z2+X424+.)+z(x1+X322+Xz4+.) =X(z2)+zX(z2) similarly H(z)=H(z2)+z1H1(z2) 2021年2月 6 The input sequence can be decomposed into even-numbered part and odd-numbered part  similarly 2021年2月 6 9.2.1 Formulation of Parallel FIR using Polyphase Decomposition ( ) ( ) ( ...) ( ...) ( ) ... 2 1 2 1 0 4 5 2 1 3 4 1 4 2 0 2 4 4 3 3 2 2 1 0 1 X z z X z x x z x z z x x z x z X z x x z x z x z x z                           ( ) ( ) ( ) 2 1 2 1 0 H z H z z H z   