Dear Jonathan,
If you use the USRP, you will obtain a complex baseband representation of your satellite signal. From this, you will need to implement a demodulator for the particular signal involved. From the output of
As far as I know there already exist demodulators for (A)FSK, BPSK and MSK - which covers the majority of the small satellites we focus on.
the demodulator, there are several ways to estimate signal-to-noise ratio that do not require prior knowledge of the bit pattern. From the signal-to-noise ratio, you can estimate the theoretical bit error rate for the type of modulation in use. See: http://www.comsoc.org/comm/private/2000/oct/1681_48comm10-pauluzzi.html GNU Radio is very suitable for this sort of thing
That are very good news for me! I'm aware about the relations between SNR and BER - I just wonder about the several ways to estimate the SNR in GnuRadio. That's exactly the information I lack of - do you have any documentation/examples/sources for how to accomplish that?
And what about the usage of sound cards as ADC? Can I also obtain SNR information when I just have an audio stream as source?
Many thanks and best regards Bastian _______________________________________________ Discuss-gnuradio mailing list [email protected] http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
