Relationship between z-transform and Fourier transform Express the complex variable Z in polar form as 2=7 x(ve)}=∑ykm 1=-00 .The Fourier transform of the product of x[n and the exponential sequence r Ifr=l, X(z)>x(en 2021/1/31 Zhongguo Liu_Biomedical Engineering_shandong Univ6 2021/1/31 Zhongguo Liu_Biomedical Engineering_Shandong Univ. ◆Express the complex variable z in polar form as Relationship between z-transform and Fourier transform jw z = re ( ) (   )  =− − − = n j w n jwn X re x n r e ◆The Fourier transform of the product of and the exponential sequence xn n r − 1, ( ) ( ) jw If r X Z X e = ⎯⎯→