数字信号课件：DSP第五章3.ppt

1、0z 10( )( )NnnH zh n z10( )()()NMkkkky na y nkb x nk01( )( )( )1MkkkNkkkb zY zH zX za z10( )( )NnnH zh n z10( )( ) ()Nmy nh m x nm10( )( ) ()Nmy nh m x nm/211201201( )( )()NNnkkknkH zh n zzz20k1101( )( )(1)1NNkkNH kH zzNWz101( )( )NckkHzHzN2jkNkze0,1,.,1kN()1jj NcH ee 22sin2NjNje( )1NcHzz 222NNNjjje

2、ee2jkkNkNzWe2kN1( )( )1kkNH kHzWz子系统：1101( )( )(1)1NNNrkkNH kH zr zNrWz2jkNkzre极点： 0,1,.,1kN11rr且*N kkzz()*()N kkkNNWWW*( )()( )NNH kHNkRk1()1( )()( )11kkN kNNH kH NkHzrWzrWz*1*1( )( )11()kkNNH kHkrWzr Wz101122212 cos()kkzzrkr zN11,2,.,21,2,.,12NkNNkN为奇数为偶数02Re( )kH k其中：12 Re( )kkNrH k W 将第k个和第(N-k)

3、个谐振器合并成一个实系数的二阶网络：01(0)( )1HHzrz/21(/2)( )1NH NHzrzzr /2 10/211( )1( )( )( )NNNNkkH zr zHzHzHzN(1)/2011( )1( )( )NNNkkH zr zHzHzN01nN( )(1)h nh Nn ( )(1)h nh Nn 10( )( )NnnH zh n z11112210121( )( )2NNNnnNnnNh n zhzh n z1112(1)201( )2NNnNnnNh nzzhz 1nNm 令102Nh10( )( )NnnH zh n z11202( )( )NNnnNnnh n zh n z12(1)0( )NnNnnh nzz