| I would like to recommend "The Scientist and Engineer's Guide to Digital Signal Processing" by Steven W. Smith. It is free to read online or download at https://www.dspguide.com/ It is suited for the reader that does not possess a heavy mathematical background; in fact, the author writes: "This book was written for scientists and engineers in a wide variety of fields: physics, bio-engineering, geology, oceanography, mechanical and electrical engineering, to name just a few. The goal is to present practical techniques while avoiding the barriers of detailed mathematics and abstract theory. To achieve this goal, three strategies were employed in writing this book: First, the techniques are explained, not simply proven to be true through mathematical derivations. While much of the mathematics is included, it is not used as the primary means of conveying the information. Nothing beats a few well written paragraphs supported by good illustrations. [...] Second, complex numbers are treated as an advanced topic, something to be learned after the fundamental principles are understood. [...] Third, very simple computer programs are used." |