aka Signal Conditioning, software defined radio, gnu radio, rtl-sdr

Good intro:
http://pyageng.mpastell.com/book/dsp.html
http://pyageng.mpastell.com/book/sampling.html#cid7

Textbook list:
https://dspguru.com/dsp/books/favorites/

DSP Guide:
http://www.dspguide.com/

GNU Radio cookbook:
https://cdn.hackaday.io/files/1648847054397056/GRC%20Cook%20Book.pdf

SDR assignments:
https://greatscottgadgets.com/sdr/