I have all three (WT1J) and I found them to be thin on digital signaling, SDRs, and understanding real world signals. I’d suggest getting a cheap SDR and starting here: https://greatscottgadgets.com/sdr/
You’ll learn how to build a basic fm radio using gnuradio along with other cool stuff, like a simple explanation of decibels among other things.
You’ll learn how to build a basic fm radio using gnuradio along with other cool stuff, like a simple explanation of decibels among other things.