gr_freq_xlating_fir_filter_ccc Class Reference
[Filters]

#include <gr_freq_xlating_fir_filter_ccc.h>

Inheritance diagram for gr_freq_xlating_fir_filter_ccc:

[legend]Collaboration diagram for gr_freq_xlating_fir_filter_ccc:

[legend]List of all members.

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Detailed Description

FIR filter combined with frequency translation with gr_complex input, gr_complex output and gr_complex 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.

Public Member Functions
virtual	~gr_freq_xlating_fir_filter_ccc ()
void	set_center_freq (double center_freq)
void	set_taps (const std::vector< gr_complex > &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_ccc (int decimation, const std::vector< gr_complex > &taps, double center_freq, double sampling_freq)
Protected Attributes
std::vector< gr_complex >	d_proto_taps
gr_fir_ccc *	d_composite_fir
gr_rotator	d_r
double	d_center_freq
double	d_sampling_freq
bool	d_updated
Friends
gr_freq_xlating_fir_filter_ccc_sptr	gr_make_freq_xlating_fir_filter_ccc (int decimation, const std::vector< gr_complex > &taps, double center_freq, double sampling_freq)

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Constructor & Destructor Documentation

gr_freq_xlating_fir_filter_ccc::~gr_freq_xlating_fir_filter_ccc (   )  [virtual]

gr_freq_xlating_fir_filter_ccc::gr_freq_xlating_fir_filter_ccc (  int  decimation, const std::vector< gr_complex > &  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.

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Member Function Documentation

void gr_freq_xlating_fir_filter_ccc::build_composite_fir (   )  [protected, virtual]

void gr_freq_xlating_fir_filter_ccc::set_center_freq (  double  center_freq  )

void gr_freq_xlating_fir_filter_ccc::set_taps (  const std::vector< gr_complex > &  taps  )

int gr_freq_xlating_fir_filter_ccc::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.

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Friends And Related Function Documentation

gr_freq_xlating_fir_filter_ccc_sptr gr_make_freq_xlating_fir_filter_ccc (  int  decimation, const std::vector< gr_complex > &  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.

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Member Data Documentation

double gr_freq_xlating_fir_filter_ccc::d_center_freq [protected]

gr_fir_ccc* gr_freq_xlating_fir_filter_ccc::d_composite_fir [protected]

std::vector<gr_complex> gr_freq_xlating_fir_filter_ccc::d_proto_taps [protected]

gr_rotator gr_freq_xlating_fir_filter_ccc::d_r [protected]

double gr_freq_xlating_fir_filter_ccc::d_sampling_freq [protected]

bool gr_freq_xlating_fir_filter_ccc::d_updated [protected]

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The documentation for this class was generated from the following files:

• gr_freq_xlating_fir_filter_ccc.h
• gr_freq_xlating_fir_filter_ccc.cc

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