sure, feel free to look into the gr-trellis documentation and provide some feedback. If you have further questions please let us know.
best, Achilleas On Mon, Apr 3, 2017 at 9:02 AM, Andy Walls <a...@silverblocksystems.net> wrote: > Ah, OK. Thank you. > I don't need anything that adaptive or automatic myself. > > I plan to play around with viterbi demodulation of GMSK and maybe SOQPSK > this week. > > As I dig into the gr-trellis implementation I may have more questions. > > Regards, > Andy > > On Mon, 2017-04-03 at 08:50 -0400, Achilleas Anastasopoulos wrote: > > Here is what needs to be done (simple). > > > > > > N is the dimensionality of the signal space (found earlier in the > > code). > > Now we need to set up a filter bank to project the incoming signal to > > all its dimensions. These filters are held on the MF[] array. > > Now (due to laziness) i didn't write a for loop that instantiates N > > filter blocks, but I just instantiated them manually for the case of > > N=2 in > > > > > > filter_fir_filter_xxx_0_0 = filter.fir_filter_ccc(Q, > > MF[0].conjugate()) > > > > filter_fir_filter_xxx_0_0_0 = filter.fir_filter_ccc(Q, > > MF[1].conjugate()) > > > > > > > > So what needs to be done is (through a for loop) instantiate these N > > filter blocks > > and appropriately modify the code (in the "connections" part) to make > > the right > > connections to and from these blocks. > > > > > > best, > > Achilleas > > > > > > > > On Sun, Apr 2, 2017 at 6:58 PM, Andy Walls > > <a...@silverblocksystems.net> wrote: > > Hi Achilleas: > > > > In the test_cpm.py example under gr-trellis, there is a > > comment: > > > > "# only works for N=2, do it manually for N>2..." > > https://github.com/gnuradio/gnuradio/blob/master/gr- > trellis/examples/python/test_cpm.py#L108 > > > > Could you, or anyone else, elaborate on what need to be done > > manually for N>2? > > > > Thanks, > > Andy > > > > > > >
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