I think you are going about it wrong then. Set up multiple APs or a single AP and multiple receivers. For a simple example think of four APs located in the corners of a square room. Want to get really fancy? Measure the time of flight of a single to all the receivers. The more APs the more accurate. To allow for interference put an AP point at the center and us that as a reference. Not perfect but without time of flight you might get pretty good numbers. With time of flight you could get pretty accurate.
I actually really want this. It would be great if somehow I could get my location in a store down to a foot or so. Where do I find the drill bits? A map pops up and shows you exactly where on the isle it is and points to it when you get near. You see creepy I see convenient. When I pay with a credit card they already know I was there. What I really want is for my freaking bank ATM to know that I do not speak Spanish!.