FIR filter combined with frequency translation with short input, gr_complex output and float tapsThis class efficiently combines a frequency translation (typically "down conversion") with a FIR filter (typically low-pass) and decimation. It is ideally suited for a "channel selection filter" and can be efficiently used to select and decimate a narrow band signal out of wide bandwidth input. More...
#include <gr_freq_xlating_fir_filter_scf.h>
Public Member Functions | |
| virtual | ~gr_freq_xlating_fir_filter_scf () |
| void | set_center_freq (double center_freq) |
| void | set_taps (const std::vector< float > &taps) |
| int | work (int noutput_items, gr_vector_const_void_star &input_items, gr_vector_void_star &output_items) |
| just like gr_block::general_work, only this arranges to call consume_each for you | |
Protected Member Functions | |
| virtual void | build_composite_fir () |
| gr_freq_xlating_fir_filter_scf (int decimation, const std::vector< float > &taps, double center_freq, double sampling_freq) | |
Protected Attributes | |
| std::vector< float > | d_proto_taps |
| gr_fir_scc * | d_composite_fir |
| gr_rotator | d_r |
| double | d_center_freq |
| double | d_sampling_freq |
| bool | d_updated |
Friends | |
| GR_CORE_API gr_freq_xlating_fir_filter_scf_sptr | gr_make_freq_xlating_fir_filter_scf (int decimation, const std::vector< float > &taps, double center_freq, double sampling_freq) |
Detailed Description
FIR filter combined with frequency translation with short input, gr_complex output and float taps
This class efficiently combines a frequency translation (typically "down conversion") with a FIR filter (typically low-pass) and decimation. It is ideally suited for a "channel selection filter" and can be efficiently used to select and decimate a narrow band signal out of wide bandwidth input.
Uses a single input array to produce a single output array. Additional inputs and/or outputs are ignored.
Constructor & Destructor Documentation
| virtual gr_freq_xlating_fir_filter_scf::~gr_freq_xlating_fir_filter_scf | ( | ) | [virtual] |
| gr_freq_xlating_fir_filter_scf::gr_freq_xlating_fir_filter_scf | ( | int | decimation, |
| const std::vector< float > & | taps, | ||
| double | center_freq, | ||
| double | sampling_freq | ||
| ) | [protected] |
Construct a FIR filter with the given taps and a composite frequency translation that shifts center_freq down to zero Hz. The frequency translation logically comes before the filtering operation.
Member Function Documentation
| virtual void gr_freq_xlating_fir_filter_scf::build_composite_fir | ( | ) | [protected, virtual] |
| void gr_freq_xlating_fir_filter_scf::set_center_freq | ( | double | center_freq | ) |
| void gr_freq_xlating_fir_filter_scf::set_taps | ( | const std::vector< float > & | taps | ) |
| int gr_freq_xlating_fir_filter_scf::work | ( | int | noutput_items, |
| gr_vector_const_void_star & | input_items, | ||
| gr_vector_void_star & | output_items | ||
| ) | [virtual] |
just like gr_block::general_work, only this arranges to call consume_each for you
The user must override work to define the signal processing code
Implements gr_sync_block.
Friends And Related Function Documentation
| GR_CORE_API gr_freq_xlating_fir_filter_scf_sptr gr_make_freq_xlating_fir_filter_scf | ( | int | decimation, |
| const std::vector< float > & | taps, | ||
| double | center_freq, | ||
| double | sampling_freq | ||
| ) | [friend] |
Construct a FIR filter with the given taps and a composite frequency translation that shifts center_freq down to zero Hz. The frequency translation logically comes before the filtering operation.
Member Data Documentation
double gr_freq_xlating_fir_filter_scf::d_center_freq [protected] |
std::vector<float> gr_freq_xlating_fir_filter_scf::d_proto_taps [protected] |
gr_rotator gr_freq_xlating_fir_filter_scf::d_r [protected] |
double gr_freq_xlating_fir_filter_scf::d_sampling_freq [protected] |
bool gr_freq_xlating_fir_filter_scf::d_updated [protected] |
The documentation for this class was generated from the following file:
