GNU Radio 3.6.4 C++ API
gr_pfb_synthesizer_ccf Class Reference

Polyphase synthesis filterbank with gr_complex input, gr_complex output and float taps. More...

#include <gr_pfb_synthesizer_ccf.h>

Inheritance diagram for gr_pfb_synthesizer_ccf:
gr_sync_interpolator gr_sync_block gr_block gr_basic_block gr_msg_accepter gruel::msg_accepter

List of all members.

Public Member Functions

 ~gr_pfb_synthesizer_ccf ()
void set_taps (const std::vector< float > &taps)
void print_taps ()
std::vector< std::vector< float > > taps () const
void set_channel_map (const std::vector< int > &map)
std::vector< int > channel_map () const
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
- Public Member Functions inherited from gr_sync_interpolator
unsigned interpolation () const
void set_interpolation (unsigned interpolation)
void forecast (int noutput_items, gr_vector_int &ninput_items_required)
 Estimate input requirements given output request.
int general_work (int noutput_items, gr_vector_int &ninput_items, gr_vector_const_void_star &input_items, gr_vector_void_star &output_items)
 compute output items from input items
int fixed_rate_ninput_to_noutput (int ninput)
 Given ninput samples, return number of output samples that will be produced. N.B. this is only defined if fixed_rate returns true. Generally speaking, you don't need to override this.
int fixed_rate_noutput_to_ninput (int noutput)
 Given noutput samples, return number of input samples required to produce noutput. N.B. this is only defined if fixed_rate returns true. Generally speaking, you don't need to override this.

Friends

GR_CORE_API
gr_pfb_synthesizer_ccf_sptr 
gr_make_pfb_synthesizer_ccf (unsigned int numchans, const std::vector< float > &taps, bool twox)

Additional Inherited Members

- Protected Member Functions inherited from gr_sync_interpolator
 gr_sync_interpolator (void)
 gr_sync_interpolator (const std::string &name, gr_io_signature_sptr input_signature, gr_io_signature_sptr output_signature, unsigned interpolation)
- Protected Member Functions inherited from gr_sync_block
 gr_sync_block (void)
 gr_sync_block (const std::string &name, gr_io_signature_sptr input_signature, gr_io_signature_sptr output_signature)
- Protected Member Functions inherited from gr_block
 gr_block (void)
 gr_block (const std::string &name, gr_io_signature_sptr input_signature, gr_io_signature_sptr output_signature)
void set_fixed_rate (bool fixed_rate)
void add_item_tag (unsigned int which_output, uint64_t abs_offset, const pmt::pmt_t &key, const pmt::pmt_t &value, const pmt::pmt_t &srcid=pmt::PMT_F)
 Adds a new tag onto the given output buffer.
void add_item_tag (unsigned int which_output, const gr_tag_t &tag)
 Adds a new tag onto the given output buffer.
void remove_item_tag (unsigned int which_input, uint64_t abs_offset, const pmt::pmt_t &key, const pmt::pmt_t &value, const pmt::pmt_t &srcid=pmt::PMT_F)
 Removes a tag from the given input buffer.
void remove_item_tag (unsigned int which_input, const gr_tag_t &tag)
 Removes a tag from the given input buffer.
void get_tags_in_range (std::vector< gr_tag_t > &v, unsigned int which_input, uint64_t abs_start, uint64_t abs_end)
 Given a [start,end), returns a vector of all tags in the range.
void get_tags_in_range (std::vector< gr_tag_t > &v, unsigned int which_input, uint64_t abs_start, uint64_t abs_end, const pmt::pmt_t &key)
 Given a [start,end), returns a vector of all tags in the range with a given key.
- Protected Member Functions inherited from gr_basic_block
 gr_basic_block (void)
 gr_basic_block (const std::string &name, gr_io_signature_sptr input_signature, gr_io_signature_sptr output_signature)
 Protected constructor prevents instantiation by non-derived classes.
void set_input_signature (gr_io_signature_sptr iosig)
 may only be called during constructor
void set_output_signature (gr_io_signature_sptr iosig)
 may only be called during constructor
void set_color (vcolor color)
 Allow the flowgraph to set for sorting and partitioning.
vcolor color () const
virtual void dispatch_msg (pmt::pmt_t which_port, pmt::pmt_t msg)

Detailed Description

Polyphase synthesis filterbank with gr_complex input, gr_complex output and float taps.


Constructor & Destructor Documentation

gr_pfb_synthesizer_ccf::~gr_pfb_synthesizer_ccf ( )

Member Function Documentation

std::vector<int> gr_pfb_synthesizer_ccf::channel_map ( ) const

Gets the current channel map.

void gr_pfb_synthesizer_ccf::print_taps ( )

Print all of the filterbank taps to screen.

void gr_pfb_synthesizer_ccf::set_channel_map ( const std::vector< int > &  map)

Set the channel map. Channels are numbers as: N/2+1 | ... | N-1 | 0 | 1 | 2 | ... | N/2 <——————- 0 ——————–> freq

So input stream 0 goes to channel 0, etc. Setting a new channel map allows the user to specify where in frequency he/she wants the input stream to go. This is especially useful to avoid putting signals into the channels on the edge of the spectrum which can either wrap around (in the case of odd number of channels) and be affected by filter rolloff in the transmitter.

The map must be at least the number of streams being sent to the block. Less and the algorithm will not have enough data to properly setup the buffers. Any more channels specified will be ignored.

void gr_pfb_synthesizer_ccf::set_taps ( const std::vector< float > &  taps)

Resets the filterbank's filter taps with the new prototype filter

Parameters:
taps(vector/list of floats) The prototype filter to populate the filterbank.
std::vector<std::vector<float> > gr_pfb_synthesizer_ccf::taps ( ) const

Return a vector<vector<>> of the filterbank taps

int gr_pfb_synthesizer_ccf::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_pfb_synthesizer_ccf_sptr gr_make_pfb_synthesizer_ccf ( unsigned int  numchans,
const std::vector< float > &  taps,
bool  twox 
)
friend

Build the polyphase synthesis filterbank.

Parameters:
numchans(unsigned integer) Specifies the number of channels M
taps(vector/list of floats) The prototype filter to populate the filterbank.
twox(bool) use 2x oversampling or not (default is no)

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