There are a lot of strategies for indoor autonomous driving. SLAM, for example seems to be getting really popular. What I've really been hoping for is some sort of indoor GPS solution. I've been keeping an eye out for something like this for years. Until about a year ago, the best bet I could see was some sort of a system that used the time of flight of an ultrasonic signal from multiple beacons (or receivers) along with an RF communication channel to determine location. There are a number of solutions that use wifi and the like for positioning, but precision is on the order of meters. But, in the last year, high precision indoor positioning has come a *long* way.

Pozyx hit the Kickstarter scene last summer, and promised an UWB tome-of-flight solution that promised 10cm precision. I picked one up this spring, and when I first set it up, it was awesome to see my positioning moving around the room as I did. But long story short, it's pretty susceptible to multipath interference and just not reliable enough for what I need.

I'd also considered taping fiducial markers all over my ceiling and using a camera to determine location. While this may work, I never spent enough time going down this path go get it to work.

Then, the Vive came out. If you haven't read up on the tracking technology, it's pretty ingenious. And it sports sub-millimeter precision!!! Right now, I'm waiting for the ts3633-cm1 modules to be available. Once I can get my hands on some, I'll be able to move forward.