On 04/14/2014 05:40 PM, Michael Ossmann wrote: > On Mon, Apr 14, 2014 at 01:25:48PM +0200, Andre Puschmann wrote: >> >> Attached is a screenshot of a GRC waveform I used to capture the >> preamble of a single packet. Channel 2 is simply the output of a >> quadrature demod block connected to a scope GUI block. I'd like to >> decode that into a sequence of bits to run preamble detection etc. >> >> I've seen a few OOT modules that do similar stuff but was wondering if >> there is a GR'ish way to this, maybe a set of generic blocks that >> could be used for that? > > It looks like you are on the right track! For the next steps, I > recommend a low pass filter (with perhaps 20 kHz cut-off) followed by > M&M clock recovery and binary slicer. Check out the recent "ASK > demodulation help" thread for more details. Try setting the decimation > of the LPF to something that gives you 2 to 5 samples per symbol.
Hi Mike, thanks! That's exactly what I was looking for. I think I have to play around with the synchronizer settings but the results are already quite promising. I'll keep you updated. Thanks again Andre _______________________________________________ Discuss-gnuradio mailing list [email protected] https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
