GNU Radio 3.6.2 C++ API
gr::filter::pfb_synthesizer_ccf Class Reference

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

#include <pfb_synthesizer_ccf.h>

Inheritance diagram for gr::filter::pfb_synthesizer_ccf:

Public Types

typedef boost::shared_ptr
< pfb_synthesizer_ccf
sptr

Public Member Functions

virtual void set_taps (const std::vector< float > &taps)=0
virtual void print_taps ()=0
virtual std::vector
< std::vector< float > > 
taps () const =0
virtual void set_channel_map (const std::vector< int > &map)=0
virtual std::vector< int > channel_map () const =0
- 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.
- Public Member Functions inherited from gr_sync_block
virtual int work (int noutput_items, gr_vector_const_void_star &input_items, gr_vector_void_star &output_items)=0
 just like gr_block::general_work, only this arranges to call consume_each for you
- Public Member Functions inherited from gr_block
virtual ~gr_block ()
unsigned history () const
void set_history (unsigned history)
bool fixed_rate () const
 Return true if this block has a fixed input to output rate.
virtual bool start ()
 Called to enable drivers, etc for i/o devices.
virtual bool stop ()
 Called to disable drivers, etc for i/o devices.
void set_output_multiple (int multiple)
 Constrain the noutput_items argument passed to forecast and general_work.
int output_multiple () const
bool output_multiple_set () const
void set_alignment (int multiple)
 Constrains buffers to work on a set item alignment (for SIMD)
int alignment () const
void set_unaligned (int na)
int unaligned () const
void set_is_unaligned (bool u)
bool is_unaligned () const
void consume (int which_input, int how_many_items)
 Tell the scheduler how_many_items of input stream which_input were consumed.
void consume_each (int how_many_items)
 Tell the scheduler how_many_items were consumed on each input stream.
void produce (int which_output, int how_many_items)
 Tell the scheduler how_many_items were produced on output stream which_output.
void set_relative_rate (double relative_rate)
 Set the approximate output rate / input rate.
double relative_rate () const
 return the approximate output rate / input rate
uint64_t nitems_read (unsigned int which_input)
 Return the number of items read on input stream which_input.
uint64_t nitems_written (unsigned int which_output)
 Return the number of items written on output stream which_output.
tag_propagation_policy_t tag_propagation_policy ()
 Asks for the policy used by the scheduler to moved tags downstream.
void set_tag_propagation_policy (tag_propagation_policy_t p)
 Set the policy by the scheduler to determine how tags are moved downstream.
gr_block_detail_sptr detail () const
void set_detail (gr_block_detail_sptr detail)
- Public Member Functions inherited from gr_basic_block
virtual ~gr_basic_block ()
long unique_id () const
std::string name () const
gr_io_signature_sptr input_signature () const
gr_io_signature_sptr output_signature () const
gr_basic_block_sptr to_basic_block ()
virtual bool check_topology (int ninputs, int noutputs)
 Confirm that ninputs and noutputs is an acceptable combination.
template<typename T >
void set_msg_handler (T msg_handler)
 Set the callback that is fired when messages are available.
- Public Member Functions inherited from gr_msg_accepter
 gr_msg_accepter ()
 ~gr_msg_accepter ()
void post (pmt::pmt_t msg)
 send msg to msg_accepter
- Public Member Functions inherited from gruel::msg_accepter
 msg_accepter ()
virtual ~msg_accepter ()

Static Public Member Functions

static sptr make (unsigned int numchans, const std::vector< float > &taps, bool twox=false)

Additional Inherited Members

- Protected Types inherited from gr_basic_block
enum  vcolor { WHITE, GREY, BLACK }
- 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 Attributes inherited from gr_basic_block
std::string d_name
gr_io_signature_sptr d_input_signature
gr_io_signature_sptr d_output_signature
long d_unique_id
vcolor d_color

Detailed Description

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

Member Typedef Documentation

Member Function Documentation

virtual std::vector<int> gr::filter::pfb_synthesizer_ccf::channel_map ( ) const
pure virtual

Gets the current channel map.

Implemented in gr::filter::pfb_synthesizer_ccf_impl.

static sptr gr::filter::pfb_synthesizer_ccf::make ( unsigned int  numchans,
const std::vector< float > &  taps,
bool  twox = false 
)
static

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)
virtual void gr::filter::pfb_synthesizer_ccf::print_taps ( )
pure virtual

Print all of the filterbank taps to screen.

Implemented in gr::filter::pfb_synthesizer_ccf_impl.

virtual void gr::filter::pfb_synthesizer_ccf::set_channel_map ( const std::vector< int > &  map)
pure virtual

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.

Implemented in gr::filter::pfb_synthesizer_ccf_impl.

virtual void gr::filter::pfb_synthesizer_ccf::set_taps ( const std::vector< float > &  taps)
pure virtual

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

Parameters
taps(vector/list of floats) The prototype filter to populate the filterbank.

Implemented in gr::filter::pfb_synthesizer_ccf_impl.

virtual std::vector<std::vector<float> > gr::filter::pfb_synthesizer_ccf::taps ( ) const
pure virtual

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

Implemented in gr::filter::pfb_synthesizer_ccf_impl.


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