Great science talk from Professor Emil Björnson presenting the motivation behind Cell-free Massive MIMO and how it can be implemented in 6G using radio stripes.
Watch the 5 videos on the playlist, it’ll be worth it. 
All videos are informative and well explained - you don’t find this kink of help anywhere. Enjoy.
The playlist lasts only 2 hours - and will contribute much more to your growth than a movie of the same duration on Netflix!
Tip: you can active Subtitles/closed captions in videos.
Watch the playlist (Youtube) → Basics of Cell-free Massive MIMO - YouTube