I was yesterday searching for the same topic. It seems that the DIDO term has been suggested only by pCell founders. You may refer to the below US patent for more information. I didn't go through it yet, but " if " pCell claim is true this would be a real breakthrough in Wireless Communications. The concept is similar to CoMP (Coordinated MultiPoint) which is for long time under study in 3GPP.
http://www.google.com/patents/US7418053
yes Akram i also think that it is somewhat similar to CoMP but in the video demonstration the CEO was talking about some kind of wave forms. Also i am not sure what kind of antenna they are using and how it can serve so many users.
I also have this white paper the only document available other than the patent regarding this technology.
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