Infinite Impulse Response (IIR) Filter design (Butterworth and Chebyshev).
DSP is best understood by doing. Take the filter design problems or FFT sequences from Ganesh Rao's chapters and write short MATLAB or Python scripts to simulate them. Seeing the filter response animate on a screen bridges the gap between text and reality. digital signal processing pdf by ganesh rao better
Review of continuous-time vs. discrete-time signals, linearity, time-invariance, and convolution. digital signal processing pdf by ganesh rao better
Alan V. Oppenheim’s text is revered by researchers and MIT students. It focuses deeply on discrete-time signal processing theory. Like Proakis, it requires a stellar mathematical foundation. Ganesh Rao acts as an excellent companion book to Oppenheim, breaking down the abstract concepts of the latter into digestible, actionable steps. Ganesh Rao vs. P. Ramesh Babu digital signal processing pdf by ganesh rao better