gr::filter::pfb_interpolator_ccf
gr::sync_interpolator
gnuradio/filter/pfb_interpolator_ccf.h
std::shared_ptr< pfb_interpolator_ccf > typedef std::shared_ptr<pfb_interpolator_ccf> gr::filter::pfb_interpolator_ccf::sptr sptr gr::filter::pfb_interpolator_ccf::sptr
sptr static sptr gr::filter::pfb_interpolator_ccf::make (unsigned int interp, const std::vector< float > &taps) make gr::filter::pfb_interpolator_ccf::make unsigned int interp const std::vector< float > & taps

Build the polyphase filterbank interpolator. interp

(unsigned integer) Specifies the interpolation rate to use

taps

(vector/list of floats) The prototype filter to populate the filterbank. The taps should be generated at the interpolated sampling rate.

taps
void virtual void gr::filter::pfb_interpolator_ccf::set_taps (const std::vector< float > &taps)=0 set_taps gr::filter::pfb_interpolator_ccf::set_taps const std::vector< float > & taps

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

(vector/list of floats) The prototype filter to populate the filterbank. The taps should be generated at the interpolated sampling rate.

taps
std::vector< std::vector< float > > virtual std::vector< std::vector< float > > gr::filter::pfb_interpolator_ccf::taps () const =0 taps gr::filter::pfb_interpolator_ccf::taps

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

make
set_taps
void virtual void gr::filter::pfb_interpolator_ccf::print_taps ()=0 print_taps gr::filter::pfb_interpolator_ccf::print_taps

Print all of the filterbank taps to screen.

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

This block takes in a signal stream and performs integer up- sampling (interpolation) with a polyphase filterbank. The first input is the integer specifying how much to interpolate by. The second input is a vector (Python list) of floating-point taps of the prototype filter.

The filter's taps should be based on the interpolation rate specified. That is, the bandwidth specified is relative to the bandwidth after interpolation.

For example, using the GNU Radio's firdes utility to building filters, we build a low-pass filter with a sampling rate of fs, a 3-dB bandwidth of BW and a transition bandwidth of TB. We can also specify the out-of-band attenuation to use, ATT, and the filter window function (a Blackman-harris window in this case). The first input is the gain, which is also specified as the interpolation rate so that the output levels are the same as the input (this creates an overall increase in power).

self._taps = filter.firdes.low_pass_2(interp, interp*fs, BW, TB, attenuation_dB=ATT, window=fft.window.WIN_BLACKMAN_hARRIS)

The PFB interpolator code takes the taps generated above and builds a set of filters. The set contains interp filters and each filter contains ceil(taps.size()/interp) taps. Each tap from the filter prototype is sequentially inserted into the next filter. When all of the input taps are used, the remaining filters in the filterbank are filled out with 0's to make sure each filter has the same number of taps.

The theory behind this block can be found in Chapter 7.1 of the following book:

f. harris, "Multirate Signal Processing for Communication Systems</EM>," Upper Saddle River, NJ: Prentice Hall, Inc. 2004.

gr::basic_block
gr::block
gr::filter::pfb_interpolator_ccf
gr::messages::msg_accepter
gr::msg_accepter
gr::sync_block
gr::sync_interpolator
std::enable_shared_from_this< basic_block >
gr::basic_block
d_name
d_symbol_alias
d_symbol_name
d_input_signature
d_output_signature
d_debug_logger
d_logger
msg_queue
d_rpc_vars
d_message_subscribers
gr::block
d_max_output_buffer
d_min_output_buffer
d_pmt_done
d_system_port
gr::filter::pfb_interpolator_ccf
gr::messages::msg_accepter
gr::msg_accepter
gr::sync_block
gr::sync_interpolator
std::basic_string< Char >
std::enable_shared_from_this< basic_block >
std::map< pmt::pmt_t, msg_queue_t, msg_queue_comparator >
std::shared_ptr< io_signature >
std::shared_ptr< logger >
std::shared_ptr< pmt_base >
std::shared_ptr< rpcbasic_base >
std::string
std::vector< long >
std::vector< rpcbasic_sptr >
elements
p
- gr::filter::pfb_interpolator_ccf
  _post
- gr::filter::pfb_interpolator_ccf
  active_thread_priority
- gr::filter::pfb_interpolator_ccf
  add_item_tag
- gr::filter::pfb_interpolator_ccf
  add_item_tag
- gr::filter::pfb_interpolator_ccf
  alias
- gr::filter::pfb_interpolator_ccf
  alias_pmt
- gr::filter::pfb_interpolator_ccf
  alias_set
- gr::filter::pfb_interpolator_ccf
  alignment
- gr::filter::pfb_interpolator_ccf
  allocate_buffer
- gr::filter::pfb_interpolator_ccf
  allocate_detail
- gr::filter::pfb_interpolator_ccf
  basic_block
- gr::filter::pfb_interpolator_ccf
  basic_block
- gr::filter::pfb_interpolator_ccf
  BLACK
- gr::filter::pfb_interpolator_ccf
  blkd_input_timer_value
- gr::filter::pfb_interpolator_ccf
  block
- gr::filter::pfb_interpolator_ccf
  block
- gr::filter::pfb_interpolator_ccf
  check_topology
- gr::filter::pfb_interpolator_ccf
  clear_finished
- gr::filter::pfb_interpolator_ccf
  color
- gr::filter::pfb_interpolator_ccf
  consume
- gr::filter::pfb_interpolator_ccf
  consume_each
- gr::filter::pfb_interpolator_ccf
  d_blkd_input_timer_value
- gr::filter::pfb_interpolator_ccf
  d_color
- gr::filter::pfb_interpolator_ccf
  d_debug_logger
- gr::filter::pfb_interpolator_ccf
  d_input_signature
- gr::filter::pfb_interpolator_ccf
  d_logger
- gr::filter::pfb_interpolator_ccf
  d_max_output_buffer
- gr::filter::pfb_interpolator_ccf
  d_message_subscribers
- gr::filter::pfb_interpolator_ccf
  d_min_output_buffer
- gr::filter::pfb_interpolator_ccf
  d_name
- gr::filter::pfb_interpolator_ccf
  d_output_signature
- gr::filter::pfb_interpolator_ccf
  d_pmt_done
- gr::filter::pfb_interpolator_ccf
  d_rpc_set
- gr::filter::pfb_interpolator_ccf
  d_rpc_vars
- gr::filter::pfb_interpolator_ccf
  d_setlock
- gr::filter::pfb_interpolator_ccf
  d_symbol_alias
- gr::filter::pfb_interpolator_ccf
  d_symbol_name
- gr::filter::pfb_interpolator_ccf
  d_symbolic_id
- gr::filter::pfb_interpolator_ccf
  d_system_port
- gr::filter::pfb_interpolator_ccf
  d_unique_id
- gr::filter::pfb_interpolator_ccf
  declare_sample_delay
- gr::filter::pfb_interpolator_ccf
  declare_sample_delay
- gr::filter::pfb_interpolator_ccf
  delete_head_nowait
- gr::filter::pfb_interpolator_ccf
  detail
- gr::filter::pfb_interpolator_ccf
  dispatch_msg
- gr::filter::pfb_interpolator_ccf
  empty_handled_p
- gr::filter::pfb_interpolator_ccf
  empty_handled_p
- gr::filter::pfb_interpolator_ccf
  empty_p
- gr::filter::pfb_interpolator_ccf
  empty_p
- gr::filter::pfb_interpolator_ccf
  enable_update_rate
- gr::filter::pfb_interpolator_ccf
  erase_msg
- gr::filter::pfb_interpolator_ccf
  expand_minmax_buffer
- gr::filter::pfb_interpolator_ccf
  finished
- gr::filter::pfb_interpolator_ccf
  fixed_rate
- gr::filter::pfb_interpolator_ccf
  fixed_rate_ninput_to_noutput
- gr::filter::pfb_interpolator_ccf
  fixed_rate_noutput_to_ninput
- gr::filter::pfb_interpolator_ccf
  forecast
- gr::filter::pfb_interpolator_ccf
  general_work
- gr::filter::pfb_interpolator_ccf
  get_iterator
- gr::filter::pfb_interpolator_ccf
  get_msg_map
- gr::filter::pfb_interpolator_ccf
  get_tags_in_range
- gr::filter::pfb_interpolator_ccf
  get_tags_in_range
- gr::filter::pfb_interpolator_ccf
  get_tags_in_window
- gr::filter::pfb_interpolator_ccf
  get_tags_in_window
- gr::filter::pfb_interpolator_ccf
  GREY
- gr::filter::pfb_interpolator_ccf
  has_msg_handler
- gr::filter::pfb_interpolator_ccf
  has_msg_port
- gr::filter::pfb_interpolator_ccf
  history
- gr::filter::pfb_interpolator_ccf
  identifier
- gr::filter::pfb_interpolator_ccf
  input_signature
- gr::filter::pfb_interpolator_ccf
  insert_tail
- gr::filter::pfb_interpolator_ccf
  interpolation
- gr::filter::pfb_interpolator_ccf
  is_pc_rpc_set
- gr::filter::pfb_interpolator_ccf
  is_rpc_set
- gr::filter::pfb_interpolator_ccf
  is_set_max_noutput_items
- gr::filter::pfb_interpolator_ccf
  is_unaligned
- gr::filter::pfb_interpolator_ccf
  log_level
- gr::filter::pfb_interpolator_ccf
  make
- gr::filter::pfb_interpolator_ccf
  max_noutput_items
- gr::filter::pfb_interpolator_ccf
  max_output_buffer
- gr::filter::pfb_interpolator_ccf
  message_port_is_hier
- gr::filter::pfb_interpolator_ccf
  message_port_is_hier_in
- gr::filter::pfb_interpolator_ccf
  message_port_is_hier_out
- gr::filter::pfb_interpolator_ccf
  message_port_pub
- gr::filter::pfb_interpolator_ccf
  message_port_register_in
- gr::filter::pfb_interpolator_ccf
  message_port_register_out
- gr::filter::pfb_interpolator_ccf
  message_port_sub
- gr::filter::pfb_interpolator_ccf
  message_port_unsub
- gr::filter::pfb_interpolator_ccf
  message_ports_in
- gr::filter::pfb_interpolator_ccf
  message_ports_out
- gr::filter::pfb_interpolator_ccf
  message_subscribers
- gr::filter::pfb_interpolator_ccf
  min_noutput_items
- gr::filter::pfb_interpolator_ccf
  min_output_buffer
- gr::filter::pfb_interpolator_ccf
  mp_relative_rate
- gr::filter::pfb_interpolator_ccf
  msg_accepter
- gr::filter::pfb_interpolator_ccf
  msg_queue
- gr::filter::pfb_interpolator_ccf
  name
- gr::filter::pfb_interpolator_ccf
  nitems_read
- gr::filter::pfb_interpolator_ccf
  nitems_written
- gr::filter::pfb_interpolator_ccf
  nmsgs
- gr::filter::pfb_interpolator_ccf
  no_pc_rpc
- gr::filter::pfb_interpolator_ccf
  notify_msg_neighbors
- gr::filter::pfb_interpolator_ccf
  output_multiple
- gr::filter::pfb_interpolator_ccf
  output_multiple_set
- gr::filter::pfb_interpolator_ccf
  output_signature
- gr::filter::pfb_interpolator_ccf
  pc_input_buffers_full
- gr::filter::pfb_interpolator_ccf
  pc_input_buffers_full
- gr::filter::pfb_interpolator_ccf
  pc_input_buffers_full_avg
- gr::filter::pfb_interpolator_ccf
  pc_input_buffers_full_avg
- gr::filter::pfb_interpolator_ccf
  pc_input_buffers_full_var
- gr::filter::pfb_interpolator_ccf
  pc_input_buffers_full_var
- gr::filter::pfb_interpolator_ccf
  pc_noutput_items
- gr::filter::pfb_interpolator_ccf
  pc_noutput_items_avg
- gr::filter::pfb_interpolator_ccf
  pc_noutput_items_var
- gr::filter::pfb_interpolator_ccf
  pc_nproduced
- gr::filter::pfb_interpolator_ccf
  pc_nproduced_avg
- gr::filter::pfb_interpolator_ccf
  pc_nproduced_var
- gr::filter::pfb_interpolator_ccf
  pc_output_buffers_full
- gr::filter::pfb_interpolator_ccf
  pc_output_buffers_full
- gr::filter::pfb_interpolator_ccf
  pc_output_buffers_full_avg
- gr::filter::pfb_interpolator_ccf
  pc_output_buffers_full_avg
- gr::filter::pfb_interpolator_ccf
  pc_output_buffers_full_var
- gr::filter::pfb_interpolator_ccf
  pc_output_buffers_full_var
- gr::filter::pfb_interpolator_ccf
  pc_throughput_avg
- gr::filter::pfb_interpolator_ccf
  pc_work_time
- gr::filter::pfb_interpolator_ccf
  pc_work_time_avg
- gr::filter::pfb_interpolator_ccf
  pc_work_time_total
- gr::filter::pfb_interpolator_ccf
  pc_work_time_var
- gr::filter::pfb_interpolator_ccf
  post
- gr::filter::pfb_interpolator_ccf
  print_taps
- gr::filter::pfb_interpolator_ccf
  processor_affinity
- gr::filter::pfb_interpolator_ccf
  produce
- gr::filter::pfb_interpolator_ccf
  relative_rate
- gr::filter::pfb_interpolator_ccf
  relative_rate_d
- gr::filter::pfb_interpolator_ccf
  relative_rate_i
- gr::filter::pfb_interpolator_ccf
  remove_item_tag
- gr::filter::pfb_interpolator_ccf
  remove_item_tag
- gr::filter::pfb_interpolator_ccf
  replace_buffer
- gr::filter::pfb_interpolator_ccf
  reset_perf_counters
- gr::filter::pfb_interpolator_ccf
  rpc_set
- gr::filter::pfb_interpolator_ccf
  sample_delay
- gr::filter::pfb_interpolator_ccf
  set_alignment
- gr::filter::pfb_interpolator_ccf
  set_blkd_input_timer_value
- gr::filter::pfb_interpolator_ccf
  set_block_alias
- gr::filter::pfb_interpolator_ccf
  set_color
- gr::filter::pfb_interpolator_ccf
  set_detail
- gr::filter::pfb_interpolator_ccf
  set_fixed_rate
- gr::filter::pfb_interpolator_ccf
  set_history
- gr::filter::pfb_interpolator_ccf
  set_input_signature
- gr::filter::pfb_interpolator_ccf
  set_interpolation
- gr::filter::pfb_interpolator_ccf
  set_inverse_relative_rate
- gr::filter::pfb_interpolator_ccf
  set_is_unaligned
- gr::filter::pfb_interpolator_ccf
  set_log_level
- gr::filter::pfb_interpolator_ccf
  set_max_noutput_items
- gr::filter::pfb_interpolator_ccf
  set_max_output_buffer
- gr::filter::pfb_interpolator_ccf
  set_max_output_buffer
- gr::filter::pfb_interpolator_ccf
  set_min_noutput_items
- gr::filter::pfb_interpolator_ccf
  set_min_output_buffer
- gr::filter::pfb_interpolator_ccf
  set_min_output_buffer
- gr::filter::pfb_interpolator_ccf
  set_msg_handler
- gr::filter::pfb_interpolator_ccf
  set_output_multiple
- gr::filter::pfb_interpolator_ccf
  set_output_signature
- gr::filter::pfb_interpolator_ccf
  set_processor_affinity
- gr::filter::pfb_interpolator_ccf
  set_relative_rate
- gr::filter::pfb_interpolator_ccf
  set_relative_rate
- gr::filter::pfb_interpolator_ccf
  set_tag_propagation_policy
- gr::filter::pfb_interpolator_ccf
  set_taps
- gr::filter::pfb_interpolator_ccf
  set_thread_priority
- gr::filter::pfb_interpolator_ccf
  set_unaligned
- gr::filter::pfb_interpolator_ccf
  setup_pc_rpc
- gr::filter::pfb_interpolator_ccf
  setup_rpc
- gr::filter::pfb_interpolator_ccf
  shared_from_base
- gr::filter::pfb_interpolator_ccf
  sptr
- gr::filter::pfb_interpolator_ccf
  start
- gr::filter::pfb_interpolator_ccf
  stop
- gr::filter::pfb_interpolator_ccf
  symbol_name
- gr::filter::pfb_interpolator_ccf
  symbolic_id
- gr::filter::pfb_interpolator_ccf
  sync_block
- gr::filter::pfb_interpolator_ccf
  sync_block
- gr::filter::pfb_interpolator_ccf
  sync_interpolator
- gr::filter::pfb_interpolator_ccf
  sync_interpolator
- gr::filter::pfb_interpolator_ccf
  system_handler
- gr::filter::pfb_interpolator_ccf
  tag_propagation_policy
- gr::filter::pfb_interpolator_ccf
  tag_propagation_policy_t
- gr::filter::pfb_interpolator_ccf
  taps
- gr::filter::pfb_interpolator_ccf
  thread_priority
- gr::filter::pfb_interpolator_ccf
  to_basic_block
- gr::filter::pfb_interpolator_ccf
  TPP_ALL_TO_ALL
- gr::filter::pfb_interpolator_ccf
  TPP_CUSTOM
- gr::filter::pfb_interpolator_ccf
  TPP_DONT
- gr::filter::pfb_interpolator_ccf
  TPP_ONE_TO_ONE
- gr::filter::pfb_interpolator_ccf
  unaligned
- gr::filter::pfb_interpolator_ccf
  unique_id
- gr::filter::pfb_interpolator_ccf
  unset_max_noutput_items
- gr::filter::pfb_interpolator_ccf
  unset_processor_affinity
- gr::filter::pfb_interpolator_ccf
  update_rate
- gr::filter::pfb_interpolator_ccf
  vcolor
- gr::filter::pfb_interpolator_ccf
  WHITE
- gr::filter::pfb_interpolator_ccf
  work
- gr::filter::pfb_interpolator_ccf
  WORK_CALLED_PRODUCE
- gr::filter::pfb_interpolator_ccf
  WORK_DONE
- gr::filter::pfb_interpolator_ccf
  work_return_t
- gr::filter::pfb_interpolator_ccf
  ~basic_block
- gr::filter::pfb_interpolator_ccf
  ~block
- gr::filter::pfb_interpolator_ccf
  ~msg_accepter