The keyword is your starting line, not your finish line. Obtain the resource legally, work through the problems with a Jupyter notebook open, and you will master the art of building modern wireless links.
If the Heath & Shabany book remains elusive, consider these signal-processing-focused alternatives (all available legally as PDFs): The keyword is your starting line, not your finish line
On the mahogany desk before him sat the heavy, blue-spined gatekeeper of his degree: Introduction to Wireless Digital Communication: A Signal Processing Perspective . To the other students, it was a collection of intimidating Greek symbols and Fourier transforms. To Leo, it was a map of the invisible world. The keyword is your starting line