first of all i want make many divices comunicate with each other in duplex without any data curption and they could comunicate simultanusly
Why do they need to communicate simultaneously in duplex? You are not going to solve an extremely complicated problem with an Arduino library. Why do you think CDMA is the answer when cellphone networks are busily engineering it out in 4G and 5G? You're jumping straight from what you are trying to achieve in your application to a presumed solution. Computer networks in effect do what you are asking all the time using well established protocols - it would be much better to formulate your problem in a way that can make use of these.
Feels like an XY issue there
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