n 2n
A discrete-time signal is given by x[n] = a u[n] + b u[-n-1],
where u[n] is the unit step function
Find the bilateral z-transform and region of covergence of x[n].
2 2
我算出來 X(Z) = 2 + a/(z-a) + -b (2a-1)/a * 1/(z-b )
感覺怪怪的......
另 region of covergence怎麼算呢?
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