GNU Radio 3.6.4 C++ API
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A rate 1/2, k=7 convolutional decoder for the CCSDS standardThis block performs soft-decision convolutional decoding using the Viterbi algorithm. More...
#include <gr_decode_ccsds_27_fb.h>
Public Member Functions | |
~gr_decode_ccsds_27_fb () | |
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. | |
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_decode_ccsds_27_fb_sptr | gr_make_decode_ccsds_27_fb () |
Additional Inherited Members | |
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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) | |
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gr_sync_block (void) | |
gr_sync_block (const std::string &name, gr_io_signature_sptr input_signature, gr_io_signature_sptr output_signature) | |
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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. | |
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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. | |
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) |
A rate 1/2, k=7 convolutional decoder for the CCSDS standard
This block performs soft-decision convolutional decoding using the Viterbi algorithm.
The input is a stream of (possibly noise corrupted) floating point values nominally spanning [-1.0, 1.0], representing the encoded channel symbols 0 (-1.0) and 1 (1.0), with erased symbols at 0.0.
The output is MSB first packed bytes of decoded values.
As a rate 1/2 code, there will be one output byte for every 16 input symbols.
This block is designed for continuous data streaming, not packetized data. The first 32 bits out will be zeroes, with the output delayed four bytes from the corresponding inputs.
gr_decode_ccsds_27_fb::~gr_decode_ccsds_27_fb | ( | ) |
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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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friend |