and how far it is
Which direction should I take?
Select a different more reasonable project that has more realistic goals.
You will need to use multiple receivers so that you can triangulate the position of the transmitting object. You can use the difference in intensity of each signal to work out a bearing.No, at such short range the signal strength from the swarm of RF emitters will not have enough variation to be able to be used as a discrimination measurement. On this path only lies tears.Your Arduino will need to be able to sample both the intensity of the RF signal, and also be able record the signal so that they can be individually identified.A receiver on a single channel cannot demodulate multiple transmitters to obtain any useful information, it would like listening to twelve people talking at you at the same time. You would have to have a more sophisticated receiver that could scan multiple channel frequencies so that it could receive signals from each transmitter that were each using a unique channel frequency.There are many practical difficulties in this however. Some research will give you more.
This is the sort of thing I was thinking about.
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This is the sort of thing I was thinking about.www.daintree.net/downloads/.../appnote_016_sna_ti_locationing.pdfMind you it is not an Arduino project.