Yeah, you'll be working with cellular tech. I would use this book, at least this is what my professor uses: https://www.amazon.com/5G-NR-Generation-Wireless-Technology-dp-0128223200/dp/0128223200/ref=dp_ob_image_bk
Btw, by RF chain I mean...
https://www.rfwireless-world.com/Articles/difference-between-SC-FDMA-and-OFDM.html
the first picture in this. understand the components that make up the chain.