I actually was going to start a blog with posts from cellular technology (basically what I did during my final semester -- RF specialized soon to be graduated EE) which would explain a little bit about the differences. CDMA is a complex scheme to handle who is using the channel for the time being. TDMA is much simpler to understand.
This is required to handle all the connections a base station can have for example. If you want to learn more about it and cellular technologies I recommend the Yonsei University Coursera Course which is very well explained.
I am working on my master's thesis right now but I will try to get back to writing the blog and maybe I post it here and you guys can give me some feedback. I will also try to do a mini post what I have in notes from classes and readings here later on