On 09/27/2017 12:07 AM, Marcus Müller wrote: > Hi Cinaed, > > interestingly, period() gives me 0b(degree ones) all the time, so I'm > not sure we don't see a bug there.
I looped over degree in range(1,33) src=digital.glfsr_source_f(degree,True,mask,seed) src=digital.glfsr_source_b(degree,True,mask,seed) and I consistently get a period of degree**2-1 both float and byte types. But I did notice running the GLFSR source in a flow graph with type Byte generates an asymmetric frequency spectrum about the center frequency. There are persistent dips in the amplitude at roughly -1.27 Hz and -2.58 Hz which aren't present in the positive frequencies - and are not present in the spectrum for type Float. -- Cinaed > > Best regards, > > Marcus > > > On 09/27/2017 12:01 AM, Cinaed Simson wrote: >> Try >> >> from gnuradio import digital as digital >> src=digital.glfsr_source_f(13,False,0x0000100D,0xA5A5) >> src.period() >> >> src has type <gr_block glfsr_source_f (0)> >> >> Unfortunately, I don't know enough to be able to convert to an array of >> floats need for filter taps. >> >> -- Cinaed >> >> >> On 09/26/2017 05:45 PM, Chad Spooner wrote: >>> All: >>> >>> I've got a working signal generator in GRC that uses the FFT Filter >>> block. In the Taps >>> field of this block, I've hand-entered a length-31 sequence that is an >>> MLSR sequence. >>> These sequences can be generated using the GRC block GLFRS Source as well. >>> >>> What I would like to do is call GLFSR from within the FFT Filter Taps >>> field with arguments >>> that depend on a Parameter. Specifically, the Degree parameter of GLFSR >>> would >>> be tied to a Parameter in the flowgraph. >>> >>> I've been searching around the web for a way to do this, but I can't >>> seem to find how >>> to call things like GLFSR as opposed to using the GLFSR block in GRC. My >>> Google >>> searches do not seem to contain the correct keywords to get me to the >>> help I need. >>> >>> I'd appreciate any hints, especially links to explanations on the web. >>> >>> Thanks! >>> >>> Chad >>> >>> -- >>> Chad M. Spooner >>> NorthWest Research Associates >>> 301 Webster Street >>> Monterey, CA 93940 >>> cmspoo...@nwra.com >>> 831 582 4904 >>> cyclostationary.blog >>> >>> >>> >>> _______________________________________________ >>> Discuss-gnuradio mailing list >>> Discuss-gnuradio@gnu.org >>> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio >>> >> >> _______________________________________________ >> Discuss-gnuradio mailing list >> Discuss-gnuradio@gnu.org >> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
