GNU Radio 3.7.0-50 C++ API
gr::fec::decode_ccsds_27_fb Class Reference

A rate 1/2, k=7 convolutional decoder for the CCSDS standard. More...

#include <decode_ccsds_27_fb.h>

Inheritance diagram for gr::fec::decode_ccsds_27_fb:
gr::sync_decimator gr::sync_block gr::block gr::basic_block gr::msg_accepter gr::messages::msg_accepter

Public Types

typedef boost::shared_ptr
< decode_ccsds_27_fb
sptr

Static Public Member Functions

static sptr make ()

Additional Inherited Members

- Public Member Functions inherited from gr::sync_decimator
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.
- Protected Types inherited from gr::basic_block
enum  vcolor { WHITE, GREY, BLACK }
- Protected Member Functions inherited from gr::sync_decimator
 sync_decimator (void)
 sync_decimator (const std::string &name, gr::io_signature::sptr input_signature, gr::io_signature::sptr output_signature, unsigned decimation)
- Protected Attributes inherited from gr::block
std::vector< long > d_max_output_buffer
std::vector< long > d_min_output_buffer
gr::thread::mutex d_setlock
gr::logger_ptr d_logger
gr::logger_ptr d_debug_logger

Detailed Description

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.

Member Typedef Documentation

Member Function Documentation

static sptr gr::fec::decode_ccsds_27_fb::make ( )
static

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