diff options
| author |   Jacob Gilbert <mrjacobagilbert@gmail.com> | 2020-04-25 13:10:32 -0600 |
|---|---|---|
| committer |   mormj <34754695+mormj@users.noreply.github.com> | 2020-04-26 11:17:00 -0400 |
| commit | 76a9d742f26621291eaa6956b8769f991c50c459 (patch) | |
| tree | c25abc6f7eeb9b00bad1f982974b9905e0ea8ad5 /gr-fft | |
| parent | gr-fft: added tukey window generation (diff) | |
| download | gnuradio-76a9d742f26621291eaa6956b8769f991c50c459.tar.xz gnuradio-76a9d742f26621291eaa6956b8769f991c50c459.zip | |
gr-fft: added documentation for flat top window design
a note about differences between other popular flat top window generators
Diffstat (limited to 'gr-fft')
| -rw-r--r-- | gr-fft/include/gnuradio/fft/window.h | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/gr-fft/include/gnuradio/fft/window.h b/gr-fft/include/gnuradio/fft/window.h index 6b4411393..9fc15c123 100644 --- a/gr-fft/include/gnuradio/fft/window.h +++ b/gr-fft/include/gnuradio/fft/window.h @@ -211,9 +211,20 @@ public: static std::vector<float> nuttal_cfd(int ntaps); /*! - * \brief Build a flat top window. + * \brief Build a flat top window per the SRS specification * - * See: http://en.wikipedia.org/wiki/Window_function#Flat_top_window + * See: + * <pre> + * Stanford Research Systems, "Model SR785 Dynamic Signal + * Analyzer: Operating Manual and Programming Reference," + * 2017, pp 2-13 + * </pre> + * + * Note: there are many flat top windows, and this implementation is different from + * SciPY and Matlab which use the coefficients from D’Antona et al. "Digital Signal + * Processing for Measurement Systems" with the following cosine coefficients: <pre> + * [0.21557895, 0.41663158, 0.277263158, 0.083578947, 0.006947368] + * </pre> * * \param ntaps Number of coefficients in the window. */ |