Locating RFID in space
I was searching for possibilities of using RFID chips to locate people in space. Apparently it isn't as straightforward as I thought - and as I found out it is very difficult, if not impossible. There are some methods out there, but the results are questionable. One such technology is called RFID-radar.
It was mentioned on a very interesting thread on RFID-Toys forum, where they are talking about the same topic - detecting RFID chip location in space.
Even though the RFID-radar does give promises, by the look of things the RFID isn't really for location detection, as it was stated on the RFID-Toys forum:
"The reality is, RFID is not suitable for positioning. Period. Passive tags are near impossible to use for this purpose because of the way they work (near field, inductive power and data transfer). Active tags which work more like typical RF transmitter devices do have some promise of being used for triangulation. However, the problem with triangulation based on signal power levels (RSSI in RFID terms) is that these measurements are never accurate. So many factors are involved which cause dynamic variations in the signal strength levels detected (RSSI value) by the RFID reader that you'll end up with a giant error factor, expanding your position precision to several meters cubed. That's why the GPS system uses timing, not signal strength, to determine your position. Signal strength just is not accurate enough."