Ultra-Wideband (UWB) Indoor Locator Recommendations for Centimeter-Level Accuracy

Hi everybody
I am looking for locator that can locate a object in a room. Works like a GPS, but must be very precise ( error with in several CMs). Tried to find, but didnt have any luck. Hope someone here may help.

Thank you

Very odd request METAL DETECTOR , Rf detector , Light detector , gas detector , or as collin says, " Buy a dog "which i thought was classic i did laugh at this comment It was funny !!

Yes, you must provide a great deal more information.

But, shot in the dark, consider the same kind of technology that is used for 3D scanning. But, that's the best I can do with the current level of information.

Or, if I get what you are saying, you need something that can produce a signal that indicates it's (what is "it", exactly) location (referenced to what?). I suppose it will send a signal with this information (to where, using what method, or what are the conditions to consider in choosing what method)???

Or can it just scream "Marco!" over an over?!?