Hi Marcin, Thanks again for your help! I was a little busy and finally got around to looking at the two C++ fir filter documents you sent me.
I tried to design an OOT C++ FIR lowpass filter block based on my understanding of these documents but my code shows error (squidly). In the OOT C++ code, I included all the #include header files shown in the documents. Then using the first document above for the lowpass design, I wrote the following: vector <float> lpfilter; then, I defined all the filter parameters (give them value) and tried to use the filter method: lpfilter = gr::filter::firdes::low_pass(gain, sampling_freq, cutoff_freq, transition_bandwidth, fft::window::win_type <https://www.gnuradio.org/doc/doxygen/classgr_1_1fft_1_1window.html#a599d7e9625d6cc77203a8b877c4911e2> window = fft::window::win_type::WIN_HAMMING, beta = 6.76); This failed and showed a squidly across the line with fft::window::win_type....! I also tried leaving off the gr::filter::firdes nothing worked and I included the fft window header file! Please send me code examples if you have any that shows how to use these functions/methods. One more question: on a search on the second document, it says the remez filter_types are: one of "bandpass", "hilbert" or "differentiator", I would have thought lowpass filters would be included?? Thank you! George On Mon, Feb 14, 2022 at 12:05 AM Marcin Puchlik <m.puch...@is-wireless.com> wrote: > Hello George, > Yes, there is. Check this out: > https://www.gnuradio.org/doc/doxygen/firdes_8h_source.html > https://www.gnuradio.org/doc/doxygen/pm__remez_8h.html > BR, > Marcin > > pon., 14 lut 2022 o 00:07 George Edwards <gedwards....@gmail.com> > napisał(a): > >> Hello GNURadio Community, >> >> I am designing a Gnuradio OOT block in C++. Are there firls and kaiser >> filter methods (analogous to the scipy package methods that one would use >> in Python OOT) that I can call to generate coefficients. >> >> Thank you! >> >> Regards, >> George >> >
