RE: [Discuss-gnuradio] gnuradio based spectrum analyzer

[Matthew Francey]

John R. Ackermann (N8UR) is:

>[looking for sharp spectral features at high resolution]

If "real time" is a requirement, you may encounter problems using the FFT
for this:  0.01Hz resolution -> sample lengths of 100s.  The MEM (maximum
entropy method) for spectrum estimation doesn't have the blinding speed of
the FFT, but it can find very narrow spectral features with much less data.
Numerical Recipies (Press, et al.) has a small section on the technique
(description, code, and even an example) if you can't google up anything.