Have there been any 'proper' field trials of Automated Air Traffic Control? Have there been any 'proper' field trials of Automated Air Traffic Control?

Specifically, something that has been tested on larger aircraft and has come beyond the drawing board. By automated I'm implying that all decisions on movements are made by computers and instructions would be for instance transmitted digitally to the cockpit.
No

Short answer, but there has never been anything resembling a "proper" trial. There have been a few small scale, limited and tightly controlled trials, but nothing over any significant time frame, involving a significant number of aircraft, or even involving aircraft in "normal" use.