On Fri, Oct 18, 2013 at 10:05 PM, Tommy Tracy II <tj...@virginia.edu> wrote: > Hello, > > I'm trying to make an FFT block in my hierarchical block, but I cannot seem > to find the correct syntax. > I'm trying to make it with a BLACKMAN_HARRIS windowing function, and it's > easy in a python program: > > fft_forward = fft.fft_vfc(window_size, True, > (fft.blackmanharris(window_size)), 1) > fft_backward = fft.fft_vcc(window_size, False, > (fft.blackmanharris(window_size)), False, 1) > > > But in a c++ program it gets hairy. Does anyone have any experience with > this? > > gr::fft::fft_vfc::sptr fft_forward = gr::fft::fft_vfc::make(SIZE, true, > gr::filter::firdes::WIN_BLACKMAN_HARRIS, num_threads); > gr::fft::fft:vcc::sptr fft_reverse = gr::fft::fft_vcc::make(SIZE, false, > gr::filter::firdes::WIN_BLACKMAN_HARRIS, false, num_threads); > > I believe what I have wrong is the Windowing, which is of the form: > > const std::vector< float > & window
I have only used gr::fft::fft_complex in C++ but I think it uses the same window type. If that's true you can create the window using: window = gr::filter::firdes::window(gr::filter::firdes::WIN_BLACKMAN_HARRIS, SIZE, 6.76); Alex _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
