  Printing process uses carbon nanotubes           Comments    
Threshold   RE: How's that gonna work? By Solandri on 3/21/2010
5:37:14 AM , Rating: 2 No. A FFT just transforms a signal from
the time to frequency domain or vice versa. If you have one
signal of a certain frequency buried in noise of million
different frequencies, a fourier transform can extract it...but
if you have several thousand transmitters all on the same
frequency, it's not going to help.  Some combination of discrete
time signal processing and adaptive beamforming on the receiver
end might work in theory, though...essentially taking advantage
of the fact that each tag has its own unique position in 3D
space.  Actually, he has a good point. A FT will also do spatial
convolution/deconvolution. e.g. If you have the amplitude and
phase information for light passing through a window in a
certain direction, a FT applied to it will act like a lens, and
"focus" the light to create an image of what the scene looks
like through that window. I had