Signals and Systems acts as a prerequisite for more advanced fields. Signals and Systems by A. Anand Kumar | PDF - Scribd

Let us test the book’s efficacy. Suppose you have a typical exam question: "Determine the Fourier Transform of a rectangular pulse."

While classics like Oppenheim and Willsky are often cited as the gold standard, many students—especially those preparing for competitive exams like GATE or university semester exams—turn to a different name: