On Mon, Dec 16, 2013 at 11:22 PM, Dan CaJacob <dan.caja...@gmail.com> wrote: > I'd like to report some signal metrics for satellite downlinks. SNR would > seem to be one example, but most algorithms I see for SNR assume that you > are generating a signal from a separate clean signal and noise source, each > with known power. What I have are recordings of real, narrow-band, digital > FM signals. I don't have a very strong DSP background. > > Can anyone point me to a good textbook that covers such practical > applications? > > Thanks for your help!
Hi Dan, SNR estimations are quite tricky in real life. If you look at the digital::mpsk_snr_est blocks, there are multiple implementation inside that do SNR estimations for M-ary PSK constellations. The different algorithms have varying accuracy and (mostly) proportional complexity. But as the name implies, this won't work for FM. Looking at Google, I found a short paper from Virginia Tech, co-authored by Steve Ellingson. I know Steve a bit, though he came just as I was finishing up my work there, and he tends to be pretty good with these things. So it's likely a good start mathematically for what you need. http://www.ece.vt.edu/swe/asmr/docs/ASMR_R16_Kumar2.pdf Tom _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
