A discrete-time sequence is obtained from as follows:                      y n( ) x n() 2 += x n( )  What is the resulting z-transform, ? What is the maximum amount of downsampling that can be applied...

A discrete-time sequence is obtained from as follows:

                     y n( ) x n() 2 += x n( )

 What is the resulting z-transform, ?

What is the maximum amount of downsampling that can be applied to in Example 13.1 before aliasing occurs?