Finite Impulse Response (FIR) filter design functions. More...
#include <gnuradio/filter/firdes.h>
Static Public Member Functions  
static std::vector< float >  window (fft::window::win_type type, int ntaps, double beta) 
static std::vector< float >  low_pass (double gain, double sampling_freq, double cutoff_freq, double transition_width, fft::window::win_type window=fft::window::win_type::WIN_HAMMING, double beta=6.76) 
Use "window method" to design a lowpass FIR filter. The normalized width of the transition band is what sets the number of taps required. Narrow > more taps. Window type determines maximum attenuation and passband ripple. More...  
static std::vector< float >  low_pass_2 (double gain, double sampling_freq, double cutoff_freq, double transition_width, double attenuation_dB, fft::window::win_type window=fft::window::win_type::WIN_HAMMING, double beta=6.76) 
Use "window method" to design a lowpass FIR filter. The normalized width of the transition band and the required stop band attenuation is what sets the number of taps required. Narrow > more taps More attenuation > more taps. The window type determines maximum attentuation and passband ripple. More...  
static std::vector< float >  high_pass (double gain, double sampling_freq, double cutoff_freq, double transition_width, fft::window::win_type window=fft::window::win_type::WIN_HAMMING, double beta=6.76) 
Use "window method" to design a highpass FIR filter. The normalized width of the transition band is what sets the number of taps required. Narrow > more taps. The window determines maximum attenuation and passband ripple. More...  
static std::vector< float >  high_pass_2 (double gain, double sampling_freq, double cutoff_freq, double transition_width, double attenuation_dB, fft::window::win_type window=fft::window::win_type::WIN_HAMMING, double beta=6.76) 
Use "window method" to design a highpass FIR filter. The normalized width of the transition band and the required stop band attenuation is what sets the number of taps required. Narrow > more taps More attenuation > more taps. The window determines maximum attenuation and passband ripple. More...  
static std::vector< float >  band_pass (double gain, double sampling_freq, double low_cutoff_freq, double high_cutoff_freq, double transition_width, fft::window::win_type window=fft::window::win_type::WIN_HAMMING, double beta=6.76) 
Use "window method" to design a bandpass FIR filter. The normalized width of the transition band is what sets the number of taps required. Narrow > more taps. The window determines maximum attenuation and passband ripple. More...  
static std::vector< float >  band_pass_2 (double gain, double sampling_freq, double low_cutoff_freq, double high_cutoff_freq, double transition_width, double attenuation_dB, fft::window::win_type window=fft::window::win_type::WIN_HAMMING, double beta=6.76) 
Use "window method" to design a bandpass FIR filter. The normalized width of the transition band and the required stop band attenuation is what sets the number of taps required. Narrow > more taps. More attenuation > more taps. Window type determines maximum attenuation and passband ripple. More...  
static std::vector< gr_complex >  complex_band_reject (double gain, double sampling_freq, double low_cutoff_freq, double high_cutoff_freq, double transition_width, fft::window::win_type window=fft::window::win_type::WIN_HAMMING, double beta=6.76) 
Use the "window method" to design a complex bandreject FIR filter. The normalized width of the transition band is what sets the number of taps required. Narrow > more taps. The window type determines maximum attenuation and passband ripple. More...  
static std::vector< gr_complex >  complex_band_reject_2 (double gain, double sampling_freq, double low_cutoff_freq, double high_cutoff_freq, double transition_width, double attenuation_dB, fft::window::win_type window=fft::window::win_type::WIN_HAMMING, double beta=6.76) 
Use "window method" to design a complex bandreject FIR filter. The normalized width of the transition band and the required stop band attenuation is what sets the number of taps required. Narrow > more taps More attenuation > more taps. Window type determines maximum attenuation and passband ripple. More...  
static std::vector< gr_complex >  complex_band_pass (double gain, double sampling_freq, double low_cutoff_freq, double high_cutoff_freq, double transition_width, fft::window::win_type window=fft::window::win_type::WIN_HAMMING, double beta=6.76) 
Use the "window method" to design a complex bandpass FIR filter. The normalized width of the transition band is what sets the number of taps required. Narrow > more taps. The window type determines maximum attenuation and passband ripple. More...  
static std::vector< gr_complex >  complex_band_pass_2 (double gain, double sampling_freq, double low_cutoff_freq, double high_cutoff_freq, double transition_width, double attenuation_dB, fft::window::win_type window=fft::window::win_type::WIN_HAMMING, double beta=6.76) 
Use "window method" to design a complex bandpass FIR filter. The normalized width of the transition band and the required stop band attenuation is what sets the number of taps required. Narrow > more taps More attenuation > more taps. Window type determines maximum attenuation and passband ripple. More...  
static std::vector< float >  band_reject (double gain, double sampling_freq, double low_cutoff_freq, double high_cutoff_freq, double transition_width, fft::window::win_type window=fft::window::win_type::WIN_HAMMING, double beta=6.76) 
Use "window method" to design a bandreject FIR filter. The normalized width of the transition band is what sets the number of taps required. Narrow > more taps. Window type determines maximum attenuation and passband ripple. More...  
static std::vector< float >  band_reject_2 (double gain, double sampling_freq, double low_cutoff_freq, double high_cutoff_freq, double transition_width, double attenuation_dB, fft::window::win_type window=fft::window::win_type::WIN_HAMMING, double beta=6.76) 
Use "window method" to design a bandreject FIR filter. The normalized width of the transition band and the required stop band attenuation is what sets the number of taps required. Narrow > more taps More attenuation > more taps. Window type determines maximum attenuation and passband ripple. More...  
static std::vector< float >  hilbert (unsigned int ntaps=19, fft::window::win_type windowtype=fft::window::win_type::WIN_RECTANGULAR, double beta=6.76) 
design a Hilbert Transform Filter More...  
static std::vector< float >  root_raised_cosine (double gain, double sampling_freq, double symbol_rate, double alpha, int ntaps) 
design a Root Cosine FIR Filter (do we need a window?) More...  
static std::vector< float >  gaussian (double gain, double spb, double bt, int ntaps) 
design a Gaussian filter More...  
Finite Impulse Response (FIR) filter design functions.

static 
Use "window method" to design a bandpass FIR filter. The normalized width of the transition band is what sets the number of taps required. Narrow > more taps. The window determines maximum attenuation and passband ripple.
gain  overall gain of filter (typically 1.0) 
sampling_freq  sampling freq (Hz) 
low_cutoff_freq  center of transition band (Hz) 
high_cutoff_freq  center of transition band (Hz) 
transition_width  width of transition band (Hz). 
window  one of fft::window::win_type 
beta  parameter for Kaiser, Exp., Gaussian, Tukey windows, the name beta is used for API compatibility but will be changed to param in 3.10. 

static 
Use "window method" to design a bandpass FIR filter. The normalized width of the transition band and the required stop band attenuation is what sets the number of taps required. Narrow > more taps. More attenuation > more taps. Window type determines maximum attenuation and passband ripple.
gain  overall gain of filter (typically 1.0) 
sampling_freq  sampling freq (Hz) 
low_cutoff_freq  center of transition band (Hz) 
high_cutoff_freq  center of transition band (Hz) 
transition_width  width of transition band (Hz). 
attenuation_dB  out of band attenuation 
window  one of fft::window::win_type 
beta  parameter for Kaiser, Exp., Gaussian, Tukey windows, the name beta is used for API compatibility but will be changed to param in 3.10. 

static 
Use "window method" to design a bandreject FIR filter. The normalized width of the transition band is what sets the number of taps required. Narrow > more taps. Window type determines maximum attenuation and passband ripple.
gain  overall gain of filter (typically 1.0) 
sampling_freq  sampling freq (Hz) 
low_cutoff_freq  center of transition band (Hz) 
high_cutoff_freq  center of transition band (Hz) 
transition_width  width of transition band (Hz) 
window  one of fft::window::win_type 
beta  parameter for Kaiser, Exp., Gaussian, Tukey windows, the name beta is used for API compatibility but will be changed to param in 3.10. 

static 
Use "window method" to design a bandreject FIR filter. The normalized width of the transition band and the required stop band attenuation is what sets the number of taps required. Narrow > more taps More attenuation > more taps. Window type determines maximum attenuation and passband ripple.
gain  overall gain of filter (typically 1.0) 
sampling_freq  sampling freq (Hz) 
low_cutoff_freq  center of transition band (Hz) 
high_cutoff_freq  center of transition band (Hz) 
transition_width  width of transition band (Hz). 
attenuation_dB  out of band attenuation 
window  one of fft::window::win_type 
beta  parameter for Kaiser, Exp., Gaussian, Tukey windows, the name beta is used for API compatibility but will be changed to param in 3.10. 

static 
Use the "window method" to design a complex bandpass FIR filter. The normalized width of the transition band is what sets the number of taps required. Narrow > more taps. The window type determines maximum attenuation and passband ripple.
gain  overall gain of filter (typically 1.0) 
sampling_freq  sampling freq (Hz) 
low_cutoff_freq  center of transition band (Hz) 
high_cutoff_freq  center of transition band (Hz) 
transition_width  width of transition band (Hz) 
window  one of fft::window::win_type 
beta  parameter for Kaiser, Exp., Gaussian, Tukey windows, the name beta is used for API compatibility but will be changed to param in 3.10. 

static 
Use "window method" to design a complex bandpass FIR filter. The normalized width of the transition band and the required stop band attenuation is what sets the number of taps required. Narrow > more taps More attenuation > more taps. Window type determines maximum attenuation and passband ripple.
gain  overall gain of filter (typically 1.0) 
sampling_freq  sampling freq (Hz) 
low_cutoff_freq  center of transition band (Hz) 
high_cutoff_freq  center of transition band (Hz) 
transition_width  width of transition band (Hz) 
attenuation_dB  out of band attenuation 
window  one of fft::window::win_type 
beta  parameter for Kaiser, Exp., Gaussian, Tukey windows, the name beta is used for API compatibility but will be changed to param in 3.10. 

static 
Use the "window method" to design a complex bandreject FIR filter. The normalized width of the transition band is what sets the number of taps required. Narrow > more taps. The window type determines maximum attenuation and passband ripple.
gain  overall gain of filter (typically 1.0) 
sampling_freq  sampling freq (Hz) 
low_cutoff_freq  center of transition band (Hz) 
high_cutoff_freq  center of transition band (Hz) 
transition_width  width of transition band (Hz) 
window  one of fft::window::win_type 
beta  parameter for Kaiser, Exp., Gaussian, Tukey windows, the name beta is used for API compatibility but will be changed to param in 3.10. 

static 
Use "window method" to design a complex bandreject FIR filter. The normalized width of the transition band and the required stop band attenuation is what sets the number of taps required. Narrow > more taps More attenuation > more taps. Window type determines maximum attenuation and passband ripple.
gain  overall gain of filter (typically 1.0) 
sampling_freq  sampling freq (Hz) 
low_cutoff_freq  center of transition band (Hz) 
high_cutoff_freq  center of transition band (Hz) 
transition_width  width of transition band (Hz) 
attenuation_dB  out of band attenuation 
window  one of fft::window::win_type 
beta  parameter for Kaiser, Exp., Gaussian, Tukey windows, the name beta is used for API compatibility but will be changed to param in 3.10. 

static 
design a Gaussian filter
gain  overall gain of filter (typically 1.0) 
spb  symbol rate, must be a factor of sample rate 
bt  bandwidth to bitrate ratio 
ntaps  number of taps 

static 
Use "window method" to design a highpass FIR filter. The normalized width of the transition band is what sets the number of taps required. Narrow > more taps. The window determines maximum attenuation and passband ripple.
gain  overall gain of filter (typically 1.0) 
sampling_freq  sampling freq (Hz) 
cutoff_freq  center of transition band (Hz) 
transition_width  width of transition band (Hz) 
window  one of fft::window::win_type 
beta  parameter for Kaiser, Exp., Gaussian, Tukey windows, the name beta is used for API compatibility but will be changed to param in 3.10. 

static 
Use "window method" to design a highpass FIR filter. The normalized width of the transition band and the required stop band attenuation is what sets the number of taps required. Narrow > more taps More attenuation > more taps. The window determines maximum attenuation and passband ripple.
gain  overall gain of filter (typically 1.0) 
sampling_freq  sampling freq (Hz) 
cutoff_freq  center of transition band (Hz) 
transition_width  width of transition band (Hz). 
attenuation_dB  out of band attenuation 
window  one of fft::window::win_type 
beta  parameter for Kaiser, Exp., Gaussian, Tukey windows, the name beta is used for API compatibility but will be changed to param in 3.10. 

static 
design a Hilbert Transform Filter
ntaps  number of taps, must be odd 
windowtype  one kind of fft::window::win_type 
beta  parameter for Kaiser, Exp., Gaussian, Tukey windows, the name beta is used for API compatibility but will be changed to param in 3.10. 

static 
Use "window method" to design a lowpass FIR filter. The normalized width of the transition band is what sets the number of taps required. Narrow > more taps. Window type determines maximum attenuation and passband ripple.
gain  overall gain of filter (typically 1.0) 
sampling_freq  sampling freq (Hz) 
cutoff_freq  center of transition band (Hz) 
transition_width  width of transition band (Hz) 
window  one of fft::window::win_type 
beta  parameter for Kaiser, Exp., Gaussian, Tukey windows, the name beta is used for API compatibility but will be changed to param in 3.10. 

static 
Use "window method" to design a lowpass FIR filter. The normalized width of the transition band and the required stop band attenuation is what sets the number of taps required. Narrow > more taps More attenuation > more taps. The window type determines maximum attentuation and passband ripple.
gain  overall gain of filter (typically 1.0) 
sampling_freq  sampling freq (Hz) 
cutoff_freq  beginning of transition band (Hz) 
transition_width  width of transition band (Hz) 
attenuation_dB  required stopband attenuation 
window  one of fft::window::win_type 
beta  parameter for Kaiser, Exp., Gaussian, Tukey windows, the name beta is used for API compatibility but will be changed to param in 3.10. 

static 
design a Root Cosine FIR Filter (do we need a window?)
gain  overall gain of filter (typically 1.0) 
sampling_freq  sampling freq (Hz) 
symbol_rate  symbol rate, must be a factor of sample rate 
alpha  excess bandwidth factor 
ntaps  number of taps 

static 