If you are an undergraduate engineering student struggling to connect convolution sums to real filters, or if you need to pass a university exam with limited time, the is one of the most efficient tools you can find. It prioritizes clarity, exam relevance, and solved numericals over abstract mathematical rigor.
The heart of Digital Signal Processing lies in the transforms—the Discrete Fourier Transform (DFT) and the Fast Fourier Transform (FFT). These topics are mathematically heavy. Rao’s treatment of these subjects focuses on the mechanics of solving the problems. He breaks down the butterfly diagrams and radix algorithms into a procedural format, making it easier for students to visualize data flow. digital signal processing pdf by ganesh rao