FIR filter combined with frequency translation with float input, gr_complex output and gr_complex 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.
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Public Member Functions |
virtual | ~gr_freq_xlating_fir_filter_fcc () |
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
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unsigned | decimation () const |
void | set_decimation (unsigned decimation) |
void | forecast (int noutput_items, gr_vector_int &ninput_items_required) |
| Estimate input requirements given output request.
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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
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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.
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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.
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Protected Member Functions |
virtual void | build_composite_fir () |
| gr_freq_xlating_fir_filter_fcc (int decimation, const std::vector< gr_complex > &taps, double center_freq, double sampling_freq) |
| gr_sync_decimator (void) |
| gr_sync_decimator (const std::string &name, gr_io_signature_sptr input_signature, gr_io_signature_sptr output_signature, unsigned decimation) |
| gr_sync_block (void) |
| gr_sync_block (const std::string &name, gr_io_signature_sptr input_signature, gr_io_signature_sptr output_signature) |
| 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.
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void | add_item_tag (unsigned int which_output, const gr_tag_t &tag) |
| Adds a new tag onto the given output buffer.
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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.
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void | remove_item_tag (unsigned int which_input, const gr_tag_t &tag) |
| Removes a tag from the given input buffer.
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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.
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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.
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| 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.
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void | set_input_signature (gr_io_signature_sptr iosig) |
| may only be called during constructor
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void | set_output_signature (gr_io_signature_sptr iosig) |
| may only be called during constructor
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void | set_color (vcolor color) |
| Allow the flowgraph to set for sorting and partitioning.
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vcolor | color () const |
bool | has_msg_handler (pmt::pmt_t which_port) |
| Tests if there is a handler attached to port which_port .
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virtual void | dispatch_msg (pmt::pmt_t which_port, pmt::pmt_t msg) |
FIR filter combined with frequency translation with float 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.