Solved Problems On Signals And Systems By Ramesh Babu |link|

A signature feature of the solved problems found in Ramesh Babu’s books is the gradation of difficulty. The problems are typically categorized into:

Find the inverse Z-transform of ( X(z) = \fracz(z-1)(z-2) ) for ROC: ( |z| > 2 ) (causal), ( |z| < 1 ) (anti-causal), and ( 1 < |z| < 2 ) (non-causal). He shows that the same algebraic expression yields three different time-domain sequences based solely on ROC. solved problems on signals and systems by ramesh babu